团队作业六

1、系统框架

 　　Java jdk+ eclipse + mysql数据库

2、系统结构图

　　

3、各模块详细设计

　　由于这次我们的项目主要是用来熟悉软件工程的流程，所以难度不大。主要模块介绍如下：

　　1、帐号

package cn.edu.sau.model;

public class User {
    private int id;
    private String userName;
    private String userPassword;
    private int role = 0; //默认为0->读者 、 1->图书管理员
    private String pname;
    
    public User(){
        this.id = -1;
    }
    
    public User(int id, String userName) {
        super();
        this.id = id;
        this.userName = userName;
    }

    public User(String userName, String userPassword) {
        super();
        this.userName = userName;
        this.userPassword = userPassword;
    }
    
    public User(int id,String userName, String userPassword, int role,String pname) {
        super();
        this.id = id;
        this.userName = userName;
        this.userPassword = userPassword;
        this.role = role;
        this.pname = pname;
    }

    public int getId() {
        return id;
    }
    public void setId(int id) {
        this.id = id;
    }
    public String getUserName() {
        return userName;
    }
    public void setUserName(String userName) {
        this.userName = userName;
    }
    public String getUserPassword() {
        return userPassword;
    }
    public void setUserPassword(String userPassword) {
        this.userPassword = userPassword;
    }

    public int getRole() {
        return role;
    }

    public void setRole(int role) {
        this.role = role;
    }

    public String getPname() {
        return pname;
    }

    public void setPname(String pname) {
        this.pname = pname;
    }
    
}

　　User类实现了对帐号的抽象描述，主要包括用户名，密码,帐号角色以及账号所有人名称。

package cn.edu.sau.dao;

import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;

import cn.edu.sau.model.User;

public class UserDao {
    public User login(Connection con,User user) throws Exception{
        User returnUser = null;
        String sql = "select * from t_user where userName=? and password=?";
        PreparedStatement pstmt = con.prepareStatement(sql);
        pstmt.setString(1, user.getUserName());
        pstmt.setString(2, user.getUserPassword());
        ResultSet rs = pstmt.executeQuery();
        if(rs.next()){
            returnUser = new User(rs.getString("userName"),rs.getString("password"),rs.getInt("role"));
        }
        return returnUser;
    }
}

　　UserDao提供帐号验证的方法并返回帐号对象，为空则帐号不存在。

package cn.edu.sau.view;

import java.awt.EventQueue;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.sql.Connection;
import java.sql.SQLException;

import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JPasswordField;
import javax.swing.JTextField;
import javax.swing.border.EmptyBorder;


import cn.edu.sau.dao.UserDao;
import cn.edu.sau.model.User;
import cn.edu.sau.util.DbUtil;
import cn.edu.sau.util.StringUtil;
import javax.swing.ImageIcon;

public class LogonFrm extends JFrame {

    private JPanel contentPane;
    private JTextField userNameTxt;
    private JPasswordField userPasswordTxt;

    /**
     * Launch the application.
     */
    public static void main(String[] args) {
        EventQueue.invokeLater(new Runnable() {
            public void run() {
                try {
                    LogonFrm frame = new LogonFrm();
                    frame.setVisible(true);
                } catch (Exception e) {
                    e.printStackTrace();
                }
            }
        });
    }

    /**
     * Create the frame.
     */
    public LogonFrm() {
        setTitle("u56FEu4E66u7BA1u7406u7CFBu7EDF");
        UserDao userDao = new UserDao();
        DbUtil dbUtil = new DbUtil();
        
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        setBounds(100, 100, 450, 300);
        //设置frame居中
        this.setLocationRelativeTo(null);
        contentPane = new JPanel();
        contentPane.setBorder(new EmptyBorder(5, 5, 5, 5));
        setContentPane(contentPane);
        contentPane.setLayout(null);
        init();
    }
    private void reset(){
        userNameTxt.setText("");
        userPasswordTxt.setText("");
    }
    private void init() {
        DbUtil dbUtil = new DbUtil();
        UserDao userDao = new UserDao();
        JLabel lb_userName = new JLabel("u7528u6237u540DuFF1A");
        lb_userName.setBounds(102, 75, 54, 15);
        contentPane.add(lb_userName);
        
        userNameTxt = new JTextField();
        userNameTxt.setBounds(166, 72, 152, 21);
        contentPane.add(userNameTxt);
        userNameTxt.setColumns(10);
        
        JLabel lb_userPassword = new JLabel("u5BC6  u7801uFF1A");
        lb_userPassword.setBounds(102, 129, 54, 15);
        contentPane.add(lb_userPassword);
        
        JButton jb_login = new JButton("u767Bu5F55");
        jb_login.setIcon(new ImageIcon("D:\java\MyBookManager\image\login.png"));
        jb_login.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                String userName = userNameTxt.getText();
                String userPassword = new String(userPasswordTxt.getPassword());
                if(StringUtil.isEmpty(userName)){
                    JOptionPane.showMessageDialog(null, "用户名不能为空");
                    return;
                }
                if(StringUtil.isEmpty(userPassword)){
                    JOptionPane.showMessageDialog(null, "密码不能为空");
                    return;
                }
                User user = new User(userName,userPassword);
                Connection con = null;
                
                try {
                    con = dbUtil.getCon();
                    User reUser = userDao.login(con, user);
                    if(reUser != null){
                        dispose();//销毁登录框
                        if(1 == reUser.getRole()){
                            new MainFrm().setVisible(true);//创建管理员主界面Firme
                        }
                        else if(0 == reUser.getRole()){
                             new UserMainFrm(reUser).setVisible(true);
                        }
                    }else{
                        JOptionPane.showMessageDialog(null, "用户名或密码不正确");
                    }
                } catch (Exception e1) {
                    JOptionPane.showMessageDialog(null, "登录失败");
                    e1.printStackTrace();
                } finally{
                    try {
                        con.close();
                    } catch (SQLException e1) {
                        e1.printStackTrace();
                    }
                }
                
            }
        });
        jb_login.setBounds(102, 191, 93, 23);
        contentPane.add(jb_login);
        
        JButton jb_reset = new JButton("u91CDu7F6E");
        jb_reset.setIcon(new ImageIcon("D:\java\MyBookManager\image\reset.png"));
        jb_reset.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                reset();
            }
        });
        jb_reset.setBounds(225, 191, 93, 23);
        contentPane.add(jb_reset);
        
        userPasswordTxt = new JPasswordField();
        userPasswordTxt.setBounds(166, 126, 152, 21);
        contentPane.add(userPasswordTxt);
        
        JLabel lblNewLabel = new JLabel(" ");
        lblNewLabel.setIcon(new ImageIcon("D:\java\MyBookManager\image\logo.png"));
        lblNewLabel.setBounds(182, 10, 99, 52);
        contentPane.add(lblNewLabel);
    }
}

　　登录框界面通过验证逻辑层返回的帐号数据判断帐号是否存在，以及判断帐号权限，打开新的界面。

　　2、图书类别维护

package cn.edu.sau.model;

public class BookType {
    private int id;
    private String bookTypeName;
    private String bookTypeDesc;
    
    
    public BookType() {
        super();
    }
    
    public BookType(String bookTypeName, String bookTypeDesc) {
        super();
        this.bookTypeName = bookTypeName;
        this.bookTypeDesc = bookTypeDesc;
    }

    public int getId() {
        return id;
    }
    public void setId(int id) {
        this.id = id;
    }
    public String getBookTypeName() {
        return bookTypeName;
    }
    public void setBookTypeName(String bookTypeName) {
        this.bookTypeName = bookTypeName;
    }
    public String getBookTypeDesc() {
        return bookTypeDesc;
    }
    public void setBookTypeDesc(String bookTypeDesc) {
        this.bookTypeDesc = bookTypeDesc;
    }

    @Override
    public String toString() {
        return this.getBookTypeName();
    }
    
    
}

 　　BookType类实现了对图书类别的对象描述，主要有图书类别名称以及图书类别的描述。

package cn.edu.sau.dao;

import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;

import cn.edu.sau.model.BookType;
import cn.edu.sau.util.StringUtil;

public class BookTypeDao {
    public int bookTypeAdd(Connection con, BookType bookType) throws Exception{
        String sql = "insert into t_booktype values(null,?,?)";
        PreparedStatement pstmt = con.prepareStatement(sql);
        pstmt.setString(1,bookType.getBookTypeName());
        pstmt.setString(2,bookType.getBookTypeDesc());
        return pstmt.executeUpdate();
    }
    
    public ResultSet bookTypeList(Connection con , BookType bookType) throws Exception{
        StringBuffer sb = new StringBuffer("select * from t_booktype");
        String bookTypeName = bookType.getBookTypeName();
        if(!StringUtil.isEmpty(bookTypeName)){
            sb.append(" and bookTypeName like '%"+bookType.getBookTypeName()+"%'");
        }
        PreparedStatement pstmt = con.prepareStatement(sb.toString().replaceAll("and", "where"));
        return pstmt.executeQuery();
    }
    
    public int bookTypeModify(Connection con,BookType bookType) throws Exception{
        String sql = "update t_bookType set booktypename=? , booktypedesc=? where id=?";
        PreparedStatement pstmt = con.prepareStatement(sql);
        pstmt.setString(1, bookType.getBookTypeName());
        pstmt.setString(2, bookType.getBookTypeDesc());
        pstmt.setInt(3, bookType.getId());
        return pstmt.executeUpdate();
    }
    
    public int bookTypeDelete(Connection con,String id) throws Exception{
        String sql = "delete from t_bookType where id=?";
        PreparedStatement pstmt = con.prepareStatement(sql);
        pstmt.setString(1,id);
        return pstmt.executeUpdate();
    }
}

　　BookTypeDao类提供了添加图书类别，获取图书类别列表，更改图书类别以及删除图书类别方法。

                String bookTypeName = bookTypeNameTxt.getText();
                String bookTypeDesc = bookTypeDescTxt.getText();
                if(StringUtil.isEmpty(bookTypeName)){
                    JOptionPane.showMessageDialog(null,"图书类别名称不能为空");
                }else{
                    Connection con = null;
                    
                    try {
                        con = dbUtil.getCon();
                        BookType bookType = new BookType(bookTypeName,bookTypeDesc);
                        int ret = bookTypeDao.bookTypeAdd(con, bookType);
                        if(1 == ret){
                            JOptionPane.showMessageDialog(null, "图书类别添加成功");
                            reset();
                        }else{
                            JOptionPane.showMessageDialog(null, "图书类别添加失败");
                        }
                    } catch (Exception e1) {
                        JOptionPane.showMessageDialog(null, "图书类别添加失败");
                        e1.printStackTrace();
                    }
                }
            }

　　图书类别添加界面获取用户输入，进行图书类别的添加。

private void fillTable(BookType bookType){
        DefaultTableModel dtm = (DefaultTableModel)bookTypeTable.getModel();
        dtm.setRowCount(0);
        Connection con = null;
        try {
            con = dbUtil.getCon();
            ResultSet res = bookTypeDao.bookTypeList(con, bookType);
            while(res.next()){
                Vector v = new Vector();
                v.add(res.getString("id"));
                v.add(res.getString("bookTypeName"));
                v.add(res.getString("bookTypeDesc"));
                dtm.addRow(v);
            }
        } catch (Exception e) {
            e.printStackTrace();
        } finally{
            try {
                dbUtil.closeCon(con);
            } catch (Exception e) {
                e.printStackTrace();
            }
        }
    }

//鼠标点击表格填充内容至相应位置
bookTypeTable.addMouseListener(new MouseAdapter() {
            @Override
            public void mousePressed(MouseEvent e) {
                int row = bookTypeTable.getSelectedRow();
                idTxt.setText((String)bookTypeTable.getValueAt(row, 0));
                bookTypeNameTxt.setText((String)bookTypeTable.getValueAt(row, 1));
                bookTypeDescTxt.setText((String)bookTypeTable.getValueAt(row, 2));
            }
        });
//修改图书类别函数体
                String bookTypeName = bookTypeNameTxt.getText();
                String bookTypeDesc = bookTypeDescTxt.getText();
                if(StringUtil.isEmpty(bookTypeName)){
                    JOptionPane.showMessageDialog(null, "图书类别名称不能为空");
                }
                BookType bookType = new BookType(bookTypeName,bookTypeDesc);
                bookType.setId(Integer.parseInt(idTxt.getText()));
                Connection con = null;
                try {
                    con = dbUtil.getCon();
                    int re = bookTypeDao.bookTypeModify(con, bookType);
                    if(1 == re){
                        JOptionPane.showMessageDialog(null, "修改成功");
                        fillTable(new BookType("",""));
                        reset();
                    }else{
                        JOptionPane.showMessageDialog(null, "修改失败");
                    }
                } catch (Exception e1) {
                    JOptionPane.showMessageDialog(null, "修改失败");
                    e1.printStackTrace();
                }finally{
                    try {
                        dbUtil.closeCon(con);
                    } catch (Exception e1) {
                        e1.printStackTrace();
                    }
                }        
//删除图书类别函数体
                String id = idTxt.getText();
                Connection con = null;
                try {
                    con = dbUtil.getCon();
                    int re = bookTypeDao.bookTypeDelete(con, id);
                    if(1 == re){
                        JOptionPane.showMessageDialog(null, "删除成功");
                        fillTable(new BookType("",""));
                        reset();
                    }else{
                        JOptionPane.showMessageDialog(null, "删除失败");
                    }
                } catch (Exception e1) {
                    JOptionPane.showMessageDialog(null, "删除失败");
                    e1.printStackTrace();
                } finally{
                    try {
                        dbUtil.closeCon(con);
                    } catch (Exception e1) {
                        e1.printStackTrace();
                    }
                }        

　　fillTable为图书类别管理界面函数，填充界面表格元素的内容。其余函数在代码中有注释，分别为表格的点击自动填充、修改图书类别、删除图书类别代码实现

 　　3、图书维护

package cn.edu.sau.model;
/**
 * 图书类
 * */
public class Book {
    private int id;
    private String bookName;
    private String bookAuthor;
    private float bookPrice;
    private String bookDesc;
    private int bookTypeId;
    private String bookTypeName;
    
    public Book() {
        super();
        this.id = -1;
        this.bookName = "";
        this.bookAuthor = "";
        this.bookPrice = 0;
        this.bookDesc = "";
        this.bookTypeId = -1;
    }
    
    public Book(int id, String bookName) {
        super();
        this.id = id;
        this.bookName = bookName;
    }

    public Book(int id, String bookName, String bookAuthor, float bookPrice,
            String bookDesc, int bookTypeId) {
        super();
        this.id = id;
        this.bookName = bookName;
        this.bookAuthor = bookAuthor;
        this.bookPrice = bookPrice;
        this.bookDesc = bookDesc;
        this.bookTypeId = bookTypeId;
    }

    public int getId() {
        return id;
    }
    public void setId(int id) {
        this.id = id;
    }
    public String getBookName() {
        return bookName;
    }
    public void setBookName(String bookName) {
        this.bookName = bookName;
    }
    public String getBookAuthor() {
        return bookAuthor;
    }
    public void setBookAuthor(String bookAuthor) {
        this.bookAuthor = bookAuthor;
    }
    public float getBookPrice() {
        return bookPrice;
    }
    public void setBookPrice(float bookPrice) {
        this.bookPrice = bookPrice;
    }
    public String getBookDesc() {
        return bookDesc;
    }
    public void setBookDesc(String bookDesc) {
        this.bookDesc = bookDesc;
    }
    public int getBookTypeId() {
        return bookTypeId;
    }
    public void setBookTypeId(int bookTypeId) {
        this.bookTypeId = bookTypeId;
    }
    public String getBookTypeName() {
        return bookTypeName;
    }
    public void setBookTypeName(String bookTypeName) {
        this.bookTypeName = bookTypeName;
    }
}

　　该类为图书的抽象类，完成了对图书的抽象描述。

package cn.edu.sau.dao;

import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;

import cn.edu.sau.model.Book;
import cn.edu.sau.model.BookType;
import cn.edu.sau.util.StringUtil;


public class BookDao {
    public static int bookAdd(Connection con , Book book) throws Exception{
        String sql = "insert into t_book values(null,?,?,?,?,?)";
        PreparedStatement pstmt = con.prepareStatement(sql);
        pstmt.setString(1,book.getBookName());
        pstmt.setString(2,book.getBookAuthor());
        pstmt.setFloat(3,book.getBookPrice());
        pstmt.setString(4,book.getBookDesc());
        pstmt.setInt(5,book.getBookTypeId());
        return pstmt.executeUpdate();    
    }
    
    public ResultSet bookList(Connection con,Book book)throws Exception{
        StringBuffer sb=new StringBuffer("select * from t_book b,t_bookType bt where b.bookTypeId=bt.id");
        if(StringUtil.isNotEmpty(book.getBookName())){
            sb.append(" and b.bookName like '%"+book.getBookName()+"%'");
        }
        if(StringUtil.isNotEmpty(book.getBookAuthor())){
            sb.append(" and b.author like '%"+book.getBookAuthor()+"%'");
        }
        
        if(book.getBookTypeId()!=-1){
            sb.append(" and b.bookTypeId = "+book.getBookTypeId());
        }
        PreparedStatement pstmt=con.prepareStatement(sb.toString());
        return pstmt.executeQuery();
    }
    
    public int bookDelete(Connection con,String id)throws Exception{
        String sql="delete from t_book where id=?";
        PreparedStatement pstmt=con.prepareStatement(sql);
        pstmt.setString(1, id);
        return pstmt.executeUpdate();
    }
    
    public int bookModify(Connection con,Book book) throws Exception{
            String sql="update t_book set bookName=?,author=?,price=?,bookDesc=?,bookTypeId=? where id=?";
            PreparedStatement pstmt=con.prepareStatement(sql);
            pstmt.setString(1, book.getBookName());
            pstmt.setString(2, book.getBookAuthor());
            pstmt.setFloat(3, book.getBookPrice());
            pstmt.setString(4, book.getBookDesc());
            pstmt.setInt(5, book.getBookTypeId());
            pstmt.setInt(6, book.getId());
            return pstmt.executeUpdate();
    }
    
    public boolean getBookByBookTypeId(Connection con,String bookTypeId)throws Exception{
        String sql="select * from t_book where bookTypeId=?";
        PreparedStatement pstmt=con.prepareStatement(sql);
        pstmt.setString(1, bookTypeId);
        ResultSet rs=pstmt.executeQuery();
        return rs.next();
    }
}

　　该类和图书类别维护的Dao层类相似，实现了图书添加，图书类别，图书修改以及图书删除的方法。

package cn.edu.sau.view;

import java.awt.EventQueue;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.sql.Connection;
import java.sql.ResultSet;
import java.sql.SQLException;

import javax.swing.JButton;
import javax.swing.JComboBox;
import javax.swing.JInternalFrame;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JTextArea;
import javax.swing.JTextField;

import cn.edu.sau.dao.BookDao;
import cn.edu.sau.dao.BookTypeDao;
import cn.edu.sau.model.Book;
import cn.edu.sau.model.BookType;
import cn.edu.sau.util.DbUtil;
import cn.edu.sau.util.StringUtil;
import javax.swing.ImageIcon;

public class BookAddInterFrm extends JInternalFrame {
    DbUtil dbUtil = new DbUtil();
    BookTypeDao bookTypeDao = new BookTypeDao();
    BookDao bookDao = new BookDao();
    
    private JTextField bookNameTxt;
    private JTextField bookAuthorTxt;
    private JTextField bookPriceTxt;
    private JComboBox jcb_bookType;
    private JTextArea bookDescTxt;

    /**
     * Launch the application.
     */
    public static void main(String[] args) {
        EventQueue.invokeLater(new Runnable() {
            public void run() {
                try {
                    BookAddInterFrm frame = new BookAddInterFrm();
                    frame.setVisible(true);
                } catch (Exception e) {
                    e.printStackTrace();
                }
            }
        });
    }

    /**
     * Create the frame.
     */
    public BookAddInterFrm() {
        
        
        
        setClosable(true);
        setIconifiable(true);
        setTitle("u56FEu4E66u6DFBu52A0");
        setBounds(100, 100, 474, 443);
        setLocation(500, 100);
        getContentPane().setLayout(null);
        
        init();
        fillBookType();

    }
    
    
    private void init() {
        JLabel lb_bookName = new JLabel("u56FEu4E66u540Du79F0uFF1A");
        lb_bookName.setBounds(29, 39, 72, 15);
        getContentPane().add(lb_bookName);
        
        bookNameTxt = new JTextField();
        bookNameTxt.setBounds(112, 36, 106, 21);
        getContentPane().add(bookNameTxt);
        bookNameTxt.setColumns(10);
        
        JLabel lb_bookAuthor = new JLabel("u56FEu4E66u4F5Cu8005uFF1A");
        lb_bookAuthor.setBounds(236, 39, 72, 15);
        getContentPane().add(lb_bookAuthor);
        
        bookAuthorTxt = new JTextField();
        bookAuthorTxt.setBounds(304, 36, 101, 21);
        getContentPane().add(bookAuthorTxt);
        bookAuthorTxt.setColumns(10);
        
        JLabel lb_bookPrice = new JLabel("u56FEu4E66u4EF7u683CuFF1A");
        lb_bookPrice.setBounds(29, 100, 72, 15);
        getContentPane().add(lb_bookPrice);
        
        bookPriceTxt = new JTextField();
        bookPriceTxt.setBounds(112, 97, 106, 21);
        getContentPane().add(bookPriceTxt);
        bookPriceTxt.setColumns(10);
        
        JLabel lb_bookType = new JLabel("u56FEu4E66u7C7Bu522BuFF1A");
        lb_bookType.setBounds(236, 100, 74, 15);
        getContentPane().add(lb_bookType);
        
        jcb_bookType = new JComboBox();
        jcb_bookType.setBounds(304, 97, 101, 21);
        getContentPane().add(jcb_bookType);
        
        JLabel lb_bookDesc = new JLabel("u56FEu4E66u7B80u4ECBuFF1A");
        lb_bookDesc.setBounds(28, 176, 73, 15);
        getContentPane().add(lb_bookDesc);
        
        bookDescTxt = new JTextArea();
        bookDescTxt.setBounds(112, 172, 297, 127);
        getContentPane().add(bookDescTxt);
        
        JButton jb_bookAdd = new JButton("u6DFBu52A0");
        jb_bookAdd.setIcon(new ImageIcon("D:\java\MyBookManager\image\add.png"));
        jb_bookAdd.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                String bookName = bookNameTxt.getText();
                String bookAuthor = bookAuthorTxt.getText();
                String bookPrice = bookPriceTxt.getText();
                String bookDesc = bookDescTxt.getText();
                if(StringUtil.isEmpty(bookName)){
                    JOptionPane.showMessageDialog(null, "图书名称不能为空");
                    return;
                }
                if(StringUtil.isEmpty(bookAuthor)){
                    JOptionPane.showMessageDialog(null, "图书作者不能为空");
                    return;
                }
                if(StringUtil.isEmpty(bookPrice)){
                    JOptionPane.showMessageDialog(null, "图书价格不能为空");
                    return;
                }
                BookType bookType = (BookType)jcb_bookType.getSelectedItem();
                int bookTypeId = bookType.getId();
                Book book = new Book(-1,bookName,bookAuthor,Float.parseFloat(bookPrice),bookDesc,bookTypeId);
                Connection con = null;
                try{
                    con = dbUtil.getCon();
                    int addNum = BookDao.bookAdd(con,book);
                    if(1 == addNum){
                        JOptionPane.showMessageDialog(null, "添加成功");
                        resetValue();
                    }else{
                        JOptionPane.showMessageDialog(null, "添加失败");
                    }
                }catch(Exception ex){
                    ex.printStackTrace();
                    JOptionPane.showMessageDialog(null, "添加失败");
                }finally{
                    try {
                        con.close();
                    } catch (SQLException e1) {
                        e1.printStackTrace();
                    }
                }
            }
        });
        jb_bookAdd.setBounds(115, 339, 93, 23);
        getContentPane().add(jb_bookAdd);
        
        JButton jb_bookReset = new JButton("u91CDu7F6E");
        jb_bookReset.setIcon(new ImageIcon("D:\java\MyBookManager\image\reset.png"));
        jb_bookReset.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                resetValue();
            }
        });
        jb_bookReset.setBounds(264, 339, 93, 23);
        getContentPane().add(jb_bookReset);
    }
    
    private void fillBookType(){
        Connection con = null;
        BookType bookType = null;
        try{
            con = dbUtil.getCon();
            ResultSet rs = bookTypeDao.bookTypeList(con, new BookType("",""));
            while(rs.next()){
                bookType = new BookType();
                bookType.setId(rs.getInt("id"));
                bookType.setBookTypeName(rs.getString("bookTypeName"));
                jcb_bookType.addItem(bookType);
            }
        }catch(Exception ex){
            ex.printStackTrace();
        }finally{
            try {
                con.close();
            } catch (SQLException e) {
                e.printStackTrace();
            }
        }
    }
    
    private void resetValue(){
        bookNameTxt.setText("");
        bookAuthorTxt.setText("");
        bookPriceTxt.setText("");
        jcb_bookType.setSelectedIndex(0);
        bookDescTxt.setText("");
    }
}

　　界面中提供了添加图书的具体实现，以及其中将图书类别添加进下拉框的方法。

package cn.edu.sau.view;

import java.awt.Component;
import java.awt.EventQueue;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.sql.Connection;
import java.sql.ResultSet;
import java.util.Vector;

import javax.swing.JButton;
import javax.swing.JComboBox;
import javax.swing.JInternalFrame;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.JTextArea;
import javax.swing.JTextField;
import javax.swing.border.TitledBorder;
import javax.swing.table.DefaultTableModel;

import org.eclipse.wb.swing.FocusTraversalOnArray;

import cn.edu.sau.dao.BookDao;
import cn.edu.sau.dao.BookTypeDao;
import cn.edu.sau.model.Book;
import cn.edu.sau.model.BookType;
import cn.edu.sau.util.DbUtil;
import cn.edu.sau.util.StringUtil;

import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import javax.swing.ImageIcon;

public class BookManageInterFrm extends JInternalFrame {
    DbUtil dbUtil = new DbUtil();
    BookTypeDao bookTypeDao = new BookTypeDao();
    BookDao bookDao = new BookDao();
    
    
    private JTextField s_bookNameTxt;
    private JTextField s_bookAuthorTxt;
    private JTable bookTable;
    private JTextField idTxt;
    private JTextField bookNameTxt;
    private JTextField bookAuthorTxt;
    private JTextField bookPriceTxt;
    private JTextArea bookDescTxt;
    private JScrollPane scrollPane;
    private JComboBox<BookType> s_jcbBookType;
    private JComboBox<BookType> jcb_bookType;

    /**
     * Launch the application.
     */
    public static void main(String[] args) {
        EventQueue.invokeLater(new Runnable() {
            public void run() {
                try {
                    BookManageInterFrm frame = new BookManageInterFrm();
                    frame.setVisible(true);
                } catch (Exception e) {
                    e.printStackTrace();
                }
            }
        });
    }

    /**
     * Create the frame.
     */
    public BookManageInterFrm() {
        setClosable(true);
        setIconifiable(true);
        setTitle("u56FEu4E66u7BA1u7406");
        setBounds(100, 100, 812, 618);
        setLocation(300, 20);
        getContentPane().setLayout(null);
        
        init();
        
        fillTable(new Book());
        this.fillBookType("search");
        this.fillBookType("modify");


    }

    private void fillBookType(String type) {
        Connection con = null;
        BookType bookType = null;
        try {
            con = dbUtil.getCon();
            ResultSet rs = bookTypeDao.bookTypeList(con, new BookType());
            if ("search".equals(type)) {
                bookType = new BookType();
                bookType.setBookTypeName("请选择...");
                bookType.setId(-1);
                this.s_jcbBookType.addItem(bookType);
            }
            while (rs.next()) {
                bookType = new BookType();
                bookType.setId(rs.getInt("id"));
                bookType.setBookTypeName(rs.getString("bookTypeName"));
                if ("search".equals(type)) {
                    this.s_jcbBookType.addItem(bookType);
                } else if ("modify".equals(type)) {
                    this.jcb_bookType.addItem(bookType);
                }
            }
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            try {
                dbUtil.closeCon(con);
            } catch (Exception e) {
                e.printStackTrace();
            }
        }
    }
    
    private void fillTable(Book book) {
        DefaultTableModel dtm = (DefaultTableModel)bookTable.getModel();    
        dtm.setRowCount(0);
        Connection con = null;
        try {
            con = dbUtil.getCon();
            ResultSet rs = bookDao.bookList(con, book);
            while (rs.next()) {
                Vector v = new Vector();
                v.add(rs.getInt("id"));
                v.add(rs.getString("bookName"));
                v.add(rs.getString("author"));
                v.add(rs.getFloat("price"));
                v.add(rs.getString("bookDesc"));
                v.add(rs.getString("bookTypeName"));
                dtm.addRow(v);
            }
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            try {
                dbUtil.closeCon(con);
            } catch (Exception e) {
                e.printStackTrace();
            }
        }
    }
    
    private void init() {
        scrollPane = new JScrollPane();
        scrollPane.setToolTipText("");
        scrollPane.setBounds(30, 91, 732, 178);
        getContentPane().add(scrollPane);
        
        bookTable = new JTable();
        bookTable.addMouseListener(new MouseAdapter() {
            @Override
            public void mousePressed(MouseEvent e) {
                int row = bookTable.getSelectedRow();
                idTxt.setText((Integer)bookTable.getValueAt(row, 0)+"");
                bookNameTxt.setText((String) bookTable.getValueAt(row, 1));
                bookAuthorTxt.setText((String) bookTable.getValueAt(row, 2));
                bookPriceTxt.setText((Float) bookTable.getValueAt(row, 3) + "");
                bookDescTxt.setText(bookTable.getValueAt(row, 4) + "");
                String bookTypeName = (String) bookTable.getValueAt(row, 5);
                int n = jcb_bookType.getItemCount();
                for (int i = 0; i < n; i++) {
                    BookType item = (BookType) jcb_bookType.getItemAt(i);
                    if (item.getBookTypeName().equals(bookTypeName)) {
                        jcb_bookType.setSelectedIndex(i);
                    }
                }
            }
        });
        bookTable.setToolTipText("u56FEu4E66");
        bookTable.setSurrendersFocusOnKeystroke(true);
        bookTable.setModel(new DefaultTableModel(
            new Object[][] {
                {null, null, null, null, null, null},
            },
            new String[] {
                "u56FEu4E66u7F16u53F7", "u56FEu4E66u540Du79F0", "u56FEu4E66u4F5Cu8005", "u56FEu4E66u4EF7u683C", "u56FEu4E66u63CFu8FF0", "u56FEu4E66u7C7Bu522B"
            }
        ) {
            boolean[] columnEditables = new boolean[] {
                true, false, false, false, false, false
            };
            public boolean isCellEditable(int row, int column) {
                return columnEditables[column];
            }
        });
        bookTable.getColumnModel().getColumn(1).setPreferredWidth(100);
        bookTable.getColumnModel().getColumn(2).setPreferredWidth(92);
        bookTable.getColumnModel().getColumn(3).setPreferredWidth(94);
        bookTable.getColumnModel().getColumn(4).setPreferredWidth(164);
        bookTable.getColumnModel().getColumn(5).setPreferredWidth(97);
        scrollPane.setViewportView(bookTable);
        
        JPanel panel = new JPanel();
        panel.setBorder(new TitledBorder(null, "u641Cu7D22u6761u4EF6", TitledBorder.LEADING, TitledBorder.TOP, null, null));
        panel.setToolTipText("u641Cu7D22u6761u4EF6");
        panel.setBounds(31, 14, 732, 68);
        getContentPane().add(panel);
        panel.setLayout(null);
        
        JLabel label = new JLabel("u56FEu4E66u7C7Bu522BuFF1A
");
        label.setBounds(410, 29, 72, 15);
        panel.add(label);
        
        JLabel lblNewLabel_1 = new JLabel("u56FEu4E66u4F5Cu8005uFF1A");
        lblNewLabel_1.setBounds(209, 29, 72, 15);
        panel.add(lblNewLabel_1);
        
        JLabel lblNewLabel = new JLabel("u56FEu4E66u540Du79F0uFF1A");
        lblNewLabel.setBounds(10, 29, 67, 15);
        panel.add(lblNewLabel);
        
        s_bookNameTxt = new JTextField();
        s_bookNameTxt.setBounds(84, 26, 114, 21);
        panel.add(s_bookNameTxt);
        s_bookNameTxt.setColumns(10);
        
        s_bookAuthorTxt = new JTextField();
        s_bookAuthorTxt.setBounds(285, 26, 114, 21);
        panel.add(s_bookAuthorTxt);
        s_bookAuthorTxt.setColumns(10);
        
        JButton jb_search = new JButton("u67E5u8BE2");
        jb_search.setIcon(new ImageIcon("D:\java\MyBookManager\image\search.png"));
        jb_search.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                Book book = new Book();
                String bookName = s_bookNameTxt.getText();
                String bookAuthor = s_bookAuthorTxt.getText();
                
                BookType bookType = (BookType)s_jcbBookType.getSelectedItem();
                int bookTypeId = bookType.getId();
                
                
                book.setBookName(bookName);
                book.setBookAuthor(bookAuthor);
                book.setBookTypeId(bookTypeId);
                fillTable(book);
            }
        });
        jb_search.setBounds(629, 25, 93, 23);
        panel.add(jb_search);
        
        s_jcbBookType = new JComboBox<BookType>();
        s_jcbBookType.setBounds(472, 26, 131, 21);
        panel.add(s_jcbBookType);
        panel.setFocusTraversalPolicy(new FocusTraversalOnArray(new Component[]{label, lblNewLabel_1, lblNewLabel, s_bookNameTxt, s_bookAuthorTxt, jb_search, s_jcbBookType}));
        
        JPanel panel_1 = new JPanel();
        panel_1.setBorder(new TitledBorder(null, "u8868u5355u64CDu4F5C", TitledBorder.LEADING, TitledBorder.TOP, null, null));
        panel_1.setToolTipText("u8868u5355u64CDu4F5C");
        panel_1.setBounds(32, 283, 732, 274);
        getContentPane().add(panel_1);
        panel_1.setLayout(null);
        
        JLabel label_1 = new JLabel("u7F16u53F7uFF1A");
        label_1.setBounds(10, 41, 57, 15);
        panel_1.add(label_1);
        
        idTxt = new JTextField();
        idTxt.setEditable(false);
        idTxt.setBounds(96, 38, 118, 21);
        panel_1.add(idTxt);
        idTxt.setColumns(10);
        
        JLabel label_2 = new JLabel("u56FEu4E66u540Du79F0uFF1A");
        label_2.setBounds(10, 81, 76, 15);
        panel_1.add(label_2);
        
        bookNameTxt = new JTextField();
        bookNameTxt.setBounds(96, 78, 118, 21);
        panel_1.add(bookNameTxt);
        bookNameTxt.setColumns(10);
        
        JLabel label_3 = new JLabel("u56FEu4E66u4F5Cu8005uFF1A");
        label_3.setBounds(224, 81, 65, 15);
        panel_1.add(label_3);
        
        bookAuthorTxt = new JTextField();
        bookAuthorTxt.setColumns(10);
        bookAuthorTxt.setBounds(299, 78, 118, 21);
        panel_1.add(bookAuthorTxt);
        
        JLabel label_4 = new JLabel("u56FEu4E66u4EF7u683CuFF1A");
        label_4.setBounds(10, 160, 76, 15);
        panel_1.add(label_4);
        
        bookPriceTxt = new JTextField();
        bookPriceTxt.setBounds(96, 157, 117, 21);
        panel_1.add(bookPriceTxt);
        bookPriceTxt.setColumns(10);
        
        JLabel label_5 = new JLabel("u56FEu4E66u7C7Bu522BuFF1A");
        label_5.setBounds(224, 160, 65, 15);
        panel_1.add(label_5);
        
        jcb_bookType = new JComboBox<BookType>();
        jcb_bookType.setBounds(299, 157, 118, 21);
        panel_1.add(jcb_bookType);
        
        JLabel label_6 = new JLabel("u56FEu4E66u63CFu8FF0uFF1A");
        label_6.setBounds(439, 81, 65, 15);
        panel_1.add(label_6);
        
        bookDescTxt = new JTextArea();
        bookDescTxt.setBounds(514, 77, 208, 98);
        panel_1.add(bookDescTxt);
        
        JButton jb_modify = new JButton("u4FEEu6539");
        jb_modify.setIcon(new ImageIcon("D:\java\MyBookManager\image\modify.png"));
        jb_modify.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                String id = idTxt.getText();
                if (StringUtil.isEmpty(id)) {
                    JOptionPane.showMessageDialog(null, "请选择要修改的记录！");
                    return;
                }
                
                String bookName=bookNameTxt.getText();
                String author=bookAuthorTxt.getText();
                String price=bookPriceTxt.getText();
                String bookDesc=bookDescTxt.getText();
                
                if(StringUtil.isEmpty(bookName)){
                    JOptionPane.showMessageDialog(null, "图书名称不能为空！");
                    return;
                }
                if(StringUtil.isEmpty(author)){
                    JOptionPane.showMessageDialog(null, "图书作者不能为空！");
                    return;
                }
                if(StringUtil.isEmpty(price)){
                    JOptionPane.showMessageDialog(null, "图书价格不能为空！");
                    return;
                }
                
                BookType bookType=(BookType) jcb_bookType.getSelectedItem();
                int bookTypeId=bookType.getId();
                
                Book book=new Book(Integer.parseInt(id),bookName,author,Float.parseFloat(price), bookDesc, bookTypeId);
                Connection con = null;
                try {
                    con = dbUtil.getCon();
                    int modifyNum = bookDao.bookModify(con, book);
                    if (modifyNum == 1) {
                        JOptionPane.showMessageDialog(null, "修改成功");
                        resetValue();
                        fillTable(new Book());
                    } else {
                        JOptionPane.showMessageDialog(null, "修改失败");
                    }
                } catch (Exception ex) {
                    ex.printStackTrace();
                    JOptionPane.showMessageDialog(null, "修改失败");
                } finally {
                    try {
                        dbUtil.closeCon(con);
                    } catch (Exception ec) {
                        ec.printStackTrace();
                    }
                }
            }
        });
        jb_modify.setBounds(66, 225, 93, 23);
        panel_1.add(jb_modify);
        
        JButton jb_delete = new JButton("u5220u9664");
        jb_delete.setIcon(new ImageIcon("D:\java\MyBookManager\image\delete.png"));
        jb_delete.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                String id = idTxt.getText();
                if (StringUtil.isEmpty(id)) {
                    JOptionPane.showMessageDialog(null, "请选择要删除的记录！");
                    return;
                }
                int n = JOptionPane.showConfirmDialog(null, "确定要删除这条记录吗？");
                if (n == 0) {
                    Connection con=null;
                    try {
                        con = dbUtil.getCon();
                        int re = bookDao.bookDelete(con, id);
                        if(1 == re){
                            JOptionPane.showMessageDialog(null, "删除成功");
                            resetValue();
                            fillTable(new Book());
                        }else
                            JOptionPane.showMessageDialog(null, "删除失败");
                    } catch (Exception e1) {
                        JOptionPane.showMessageDialog(null, "删除失败");
                        e1.printStackTrace();
                    }
                }
            }
        });
        jb_delete.setBounds(257, 225, 93, 23);
        panel_1.add(jb_delete);
    }
    
    private void resetValue() {
        this.idTxt.setText("");
        this.bookNameTxt.setText("");
        this.bookAuthorTxt.setText("");
        this.bookPriceTxt.setText("");
        this.bookDescTxt.setText("");
        if (jcb_bookType.getItemCount() > 0) {
            jcb_bookType.setSelectedIndex(0);
        }
    }
}

　　提供图书管理功能，主要功能和图书类别管理类似，这里不再赘述。

　 4、读者借阅图书

package cn.edu.sau.dao;

import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;

import cn.edu.sau.model.Book;
import cn.edu.sau.model.User;
import cn.edu.sau.util.StringUtil;

public class UserDao {
    public User login(Connection con, User user) throws Exception {
        User returnUser = null;
        String sql = "select * from t_user where userName=? and password=?";
        PreparedStatement pstmt = con.prepareStatement(sql);
        pstmt.setString(1, user.getUserName());
        pstmt.setString(2, user.getUserPassword());
        ResultSet rs = pstmt.executeQuery();
        if (rs.next()) {
            returnUser = new User(rs.getInt("id"), rs.getString("userName"),
                    rs.getString("password"), rs.getInt("role"),
                    rs.getString("pname"));
        }
        return returnUser;
    }

    // 借书
    public int lendBook(Connection con, int userId, int bookId)
            throws Exception {
        String sql = "insert into t_lendbook values(null,?,?)";
        PreparedStatement pstmt = con.prepareStatement(sql);
        pstmt.setInt(1, userId);
        pstmt.setInt(2, bookId);
        return pstmt.executeUpdate();
    }

    // 还书
    public int returnBook(Connection con, String id) throws Exception {
        String sql = "delete from t_lendbook where id=?";
        PreparedStatement pstmt = con.prepareStatement(sql);
        pstmt.setString(1, id);
        return pstmt.executeUpdate();
    }

    public ResultSet lendBookList(Connection con, User user, Book book)
            throws Exception {
        StringBuffer sb = new StringBuffer("select * from t_lendbook ");
        if(user!=null && user.getId()!= -1){
            sb.append(" and userid = "+user.getId());
        }
        if(book!=null && book.getId()!=-1){
            sb.append(" and bookid ="+book.getId());
        }
        PreparedStatement pstmt = con.prepareStatement(sb.toString().replaceFirst("and", "where"));
        return pstmt.executeQuery();
    }

    public String getPnameById(Connection con, int userId) throws Exception {
        String sql = "select * from t_user where id=?";
        PreparedStatement pstmt = con.prepareStatement(sql);
        pstmt.setInt(1, userId);
        ResultSet rs = pstmt.executeQuery();
        if (rs.next())
            return rs.getString("pname");
        else
            return null;
    }
}

　　提供借书，还书，读取借书类别清单，以及辅助函数（根据用户id获取用户姓名）等方法。

package cn.edu.sau.view;

import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.sql.Connection;
import java.sql.ResultSet;
import java.util.Vector;

import javax.swing.JButton;
import javax.swing.JComboBox;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JMenu;
import javax.swing.JMenuBar;
import javax.swing.JMenuItem;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.JTextField;
import javax.swing.border.EmptyBorder;
import javax.swing.border.TitledBorder;
import javax.swing.table.DefaultTableModel;

import cn.edu.sau.dao.BookDao;
import cn.edu.sau.dao.BookTypeDao;
import cn.edu.sau.dao.UserDao;
import cn.edu.sau.model.Book;
import cn.edu.sau.model.BookType;
import cn.edu.sau.model.User;
import cn.edu.sau.util.DbUtil;
import java.awt.Window.Type;
import javax.swing.ImageIcon;


public class UserMainFrm extends JFrame {
    private User user;
    DbUtil dbUtil = new DbUtil();
    BookDao bookDao = new BookDao();
    BookTypeDao bookTypeDao = new BookTypeDao();
    UserDao userDao = new UserDao();
    
    private JPanel contentPane;
    private JPanel panel;
    private JTextField bookNameTxt;
    private JTextField bookAuthorTxt;
    private JComboBox<BookType> jcb_bookType;
    private JButton jb_search;
    private JTable table;
    private JTextField s_idTxt;
    private JButton jb_lendBook;
    private JTextField s_bookNameTxt;
    
    /**
     * Launch the application.
     */
    /*public static void main(String[] args) {
        EventQueue.invokeLater(new Runnable() {
            public void run() {
                try {
                    
                    UserMainFrm frame = new UserMainFrm();
                    frame.setVisible(true);
                } catch (Exception e) {
                    e.printStackTrace();
                }
            }
        });
    }*/

    /**
     * Create the frame.
     */
    public UserMainFrm(User user) {
        
        setTitle("u501Fu9605u7CFBu7EDF");
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        setBounds(100, 100, 835, 445);
        this.user = user;
        JOptionPane.showMessageDialog(null, "欢迎"+user.getPname()+"使用我们的系统");
        
        init();
        fillTable(new Book());
        this.fillBookType("search");
        this.fillBookType("modify");
    }
    
    

    private void fillBookType(String type) {
        Connection con = null;
        BookType bookType = null;
        try {
            con = dbUtil.getCon();
            ResultSet rs = bookTypeDao.bookTypeList(con, new BookType());
            if ("search".equals(type)) {
                bookType = new BookType();
                bookType.setBookTypeName("请选择...");
                bookType.setId(-1);
                this.jcb_bookType.addItem(bookType);
            }
            while (rs.next()) {
                bookType = new BookType();
                bookType.setId(rs.getInt("id"));
                bookType.setBookTypeName(rs.getString("bookTypeName"));
                if ("search".equals(type)) {
                    this.jcb_bookType.addItem(bookType);
                } else if ("modify".equals(type)) {
                    this.jcb_bookType.addItem(bookType);
                }
            }
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            try {
                dbUtil.closeCon(con);
            } catch (Exception e) {
                e.printStackTrace();
            }
        }
    }
    
    private void fillTable(Book book) {
        DefaultTableModel dtm = (DefaultTableModel)table.getModel();    
        dtm.setRowCount(0);
        Connection con = null;
        try {
            con = dbUtil.getCon();
            ResultSet rs = bookDao.bookList(con, book);
            while (rs.next()) {
                Vector v = new Vector();
                v.add(rs.getInt("id"));
                v.add(rs.getString("bookName"));
                v.add(rs.getString("author"));
                v.add(rs.getFloat("price"));
                v.add(rs.getString("bookDesc"));
                v.add(rs.getString("bookTypeName"));
                String state = rs.getInt("state")==1?"借阅中":"正常";
                v.add(state);
                dtm.addRow(v);
            }
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            try {
                dbUtil.closeCon(con);
            } catch (Exception e) {
                e.printStackTrace();
            }
        }
    }
    
    private void init() {
        contentPane = new JPanel();
        contentPane.setBorder(new EmptyBorder(5, 5, 5, 5));
        setContentPane(contentPane);
        contentPane.setLayout(null);
        
        panel = new JPanel();
        panel.setLayout(null);
        panel.setToolTipText("u641Cu7D22u6761u4EF6");
        panel.setBorder(new TitledBorder(null, "u641Cu7D22u6761u4EF6", TitledBorder.LEADING, TitledBorder.TOP, null, null));
        panel.setBounds(43, 28, 732, 68);
        contentPane.add(panel);
        
        JLabel label = new JLabel("u56FEu4E66u7C7Bu522BuFF1A
");
        label.setBounds(410, 29, 72, 15);
        panel.add(label);
        
        JLabel label_1 = new JLabel("u56FEu4E66u4F5Cu8005uFF1A");
        label_1.setBounds(209, 29, 72, 15);
        panel.add(label_1);
        
        JLabel label_2 = new JLabel("u56FEu4E66u540Du79F0uFF1A");
        label_2.setBounds(10, 29, 67, 15);
        panel.add(label_2);
        
        bookNameTxt = new JTextField();
        bookNameTxt.setColumns(10);
        bookNameTxt.setBounds(84, 26, 114, 21);
        panel.add(bookNameTxt);
        
        bookAuthorTxt = new JTextField();
        bookAuthorTxt.setColumns(10);
        bookAuthorTxt.setBounds(285, 26, 114, 21);
        panel.add(bookAuthorTxt);
        
        jb_search = new JButton("u67E5u8BE2");
        jb_search.setIcon(new ImageIcon("D:\java\MyBookManager\image\search.png"));
        jb_search.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                Book book = new Book();
                String bookName = bookNameTxt.getText();
                String bookAuthor = bookAuthorTxt.getText();
                
                BookType bookType = (BookType)jcb_bookType.getSelectedItem();
                int bookTypeId = bookType.getId();
                
                
                book.setBookName(bookName);
                book.setBookAuthor(bookAuthor);
                book.setBookTypeId(bookTypeId);
                fillTable(book);
            }
        });
        jb_search.setBounds(629, 25, 93, 23);
        panel.add(jb_search);
        
        jcb_bookType = new JComboBox<BookType>();
        jcb_bookType.setBounds(472, 26, 131, 21);
        panel.add(jcb_bookType);
        
        JScrollPane scrollPane = new JScrollPane();
        scrollPane.setToolTipText("");
        scrollPane.setBounds(43, 120, 732, 178);
        contentPane.add(scrollPane);
        
        table = new JTable();
        table.addMouseListener(new MouseAdapter() {
            @Override
            public void mousePressed(MouseEvent e) {
                int row = table.getSelectedRow();
                s_idTxt.setText((Integer)table.getValueAt(row, 0)+"");
                s_bookNameTxt.setText(table.getValueAt(row, 1)+"");
            }
        });
        table.setModel(new DefaultTableModel(
            new Object[][] {
                {null, null, null, null, null, null, null},
            },
            new String[] {
                "u56FEu4E66u7F16u53F7", "u56FEu4E66u540Du79F0", "u56FEu4E66u4F5Cu8005", "u56FEu4E66u4EF7u683C", "u56FEu4E66u63CFu8FF0", "u56FEu4E66u7C7Bu522B", "u56FEu4E66u72B6u6001"
            }
        ));
        table.setToolTipText("u56FEu4E66");
        table.setSurrendersFocusOnKeystroke(true);
        scrollPane.setViewportView(table);
        
        jb_lendBook = new JButton("u501Fu4E66");
        jb_lendBook.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                int row = table.getSelectedRow();
                String state = table.getValueAt(row,6)+"";
                if("借阅中".equals(state)){
                    JOptionPane.showMessageDialog(null, "该书已经被借走，请选择其他书籍");
                }else{
                    Connection con=null;
                    
                    try {
                        con = dbUtil.getCon();
                        int bookId = (Integer)table.getValueAt(row,0);
                        
                        int ret = userDao.lendBook(con, user.getId(), bookId);
                        if(1 == ret){
                            fillTable(new Book());
                            JOptionPane.showMessageDialog(null, "借阅成功");
                            bookDao.bookLend(con, bookId);
                        }
                        else
                            JOptionPane.showMessageDialog(null, "借阅失败");
                    } catch (Exception e1) {
                        JOptionPane.showMessageDialog(null, "借阅失败");
                        e1.printStackTrace();
                    } finally{
                        try {
                            dbUtil.closeCon(con);
                        } catch (Exception e1) {
                            e1.printStackTrace();
                        }
                    }
                }
            }
        });
        jb_lendBook.setBounds(615, 322, 160, 23);
        contentPane.add(jb_lendBook);
        
        JLabel label_3 = new JLabel("u56FEu4E66u7F16u53F7uFF1A");
        label_3.setBounds(43, 326, 66, 15);
        contentPane.add(label_3);
        
        s_idTxt = new JTextField();
        s_idTxt.setEnabled(false);
        s_idTxt.setBounds(119, 323, 135, 21);
        contentPane.add(s_idTxt);
        s_idTxt.setColumns(10);
        
        JLabel label_4 = new JLabel("u56FEu4E66u540Du79F0uFF1A");
        label_4.setBounds(340, 326, 66, 15);
        contentPane.add(label_4);
        
        s_bookNameTxt = new JTextField();
        s_bookNameTxt.setEnabled(false);
        s_bookNameTxt.setColumns(10);
        s_bookNameTxt.setBounds(427, 323, 135, 21);
        contentPane.add(s_bookNameTxt);
    }
}

　　这里书的状态主要由book表的state字段决定，为0正常，为1表示被借走。

　　5、管理员借阅情况管理

package cn.edu.sau.view;

import java.awt.Color;
import java.awt.Component;
import java.awt.EventQueue;
import java.sql.Connection;
import java.sql.ResultSet;
import java.util.Vector;

import javax.swing.JButton;
import javax.swing.JInternalFrame;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.JTextField;
import javax.swing.UIManager;
import javax.swing.border.TitledBorder;
import javax.swing.table.DefaultTableModel;

import org.eclipse.wb.swing.FocusTraversalOnArray;

import cn.edu.sau.dao.BookDao;
import cn.edu.sau.dao.UserDao;
import cn.edu.sau.model.Book;
import cn.edu.sau.model.User;
import cn.edu.sau.util.DbUtil;
import cn.edu.sau.util.StringUtil;

import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;

public class LendBookManageInterFrm extends JInternalFrame {
    DbUtil dbUtil = new DbUtil();
    UserDao userDao = new UserDao();
    BookDao bookDao = new BookDao();
    
    private JTextField userIdTxt;
    private JTextField bookIdTxt;
    private JTable table;
    private JTextField s_idTxt;
    private JTextField s_userNameTxt;
    private JTextField s_bookNameTxt;

    /**
     * Launch the application.
     */
    public static void main(String[] args) {
        EventQueue.invokeLater(new Runnable() {
            public void run() {
                try {
                    LendBookManageInterFrm frame = new LendBookManageInterFrm();
                    frame.setVisible(true);
                } catch (Exception e) {
                    e.printStackTrace();
                }
            }
        });
    }

    /**
     * Create the frame.
     */
    public LendBookManageInterFrm() {
        setIconifiable(true);
        setClosable(true);
        setTitle("u56FEu4E66u501Fu9605u7BA1u7406");
        setBounds(100, 100, 691, 448);
        getContentPane().setLayout(null);
        
        init();
        fillTable(null,null);
    }
    //填充借书记录表格
    private void fillTable(User user,Book book){
        DefaultTableModel dtm = (DefaultTableModel)table.getModel();    
        dtm.setRowCount(0);
        Connection con = null;
        try {
            con = dbUtil.getCon();
            ResultSet rs = userDao.lendBookList(con, user, book);
            while (rs.next()) {
                Vector v = new Vector();
                v.add(rs.getInt("id"));
                v.add(userDao.getPnameById(con, rs.getInt("userid"))+"("+rs.getInt("userid")+")");
                v.add(bookDao.getBookNameById(con, rs.getInt("bookid"))+"("+rs.getInt("bookid")+")");
                dtm.addRow(v);
            }
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            try {
                dbUtil.closeCon(con);
            } catch (Exception e) {
                e.printStackTrace();
            }
        }
    }

    private void init() {
        JPanel panel = new JPanel();
        panel.setBorder(new TitledBorder(UIManager.getBorder("TitledBorder.border"), "u641Cu7D22u6761u4EF6", TitledBorder.LEADING, TitledBorder.TOP, null, new Color(0, 0, 0)));
        panel.setToolTipText("u641Cu7D22u6761u4EF6");
        panel.setBounds(10, 24, 655, 58);
        getContentPane().add(panel);
        panel.setLayout(null);
        
        JLabel lblid = new JLabel("u7528u6237IduFF1A");
        lblid.setBounds(10, 20, 70, 15);
        panel.add(lblid);
        
        userIdTxt = new JTextField();
        userIdTxt.setBounds(78, 17, 150, 21);
        panel.add(userIdTxt);
        userIdTxt.setColumns(10);
        
        JLabel lblid_1 = new JLabel("u56FEu4E66Id
uFF1A");
        lblid_1.setBounds(238, 20, 70, 15);
        panel.add(lblid_1);
        
        bookIdTxt = new JTextField();
        bookIdTxt.setBounds(318, 17, 155, 21);
        panel.add(bookIdTxt);
        bookIdTxt.setColumns(10);
        
        //搜索按钮
        JButton jb_search = new JButton("u641Cu7D22");
        jb_search.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                Connection con=null;
                try {
                    con = dbUtil.getCon();
                    String userId = userIdTxt.getText();
                    String bookId = bookIdTxt.getText();
                    Book book = new Book();
                    User user = new User();
                    if(StringUtil.isNotEmpty(bookId)){
                        book.setId(Integer.parseInt(bookId));
                    }
                    if(StringUtil.isNotEmpty(userId))
                        user.setId(Integer.parseInt(userId));
                    fillTable(user,book);
                } catch (Exception e1) {
                    e1.printStackTrace();
                }finally{
                    try {
                        dbUtil.closeCon(con);
                    } catch (Exception e1) {
                        e1.printStackTrace();
                    }
                }
            }
        });
        jb_search.setBounds(510, 16, 93, 23);
        panel.add(jb_search);
        panel.setFocusTraversalPolicy(new FocusTraversalOnArray(new Component[]{lblid, userIdTxt, lblid_1, bookIdTxt, jb_search}));
        
        JScrollPane scrollPane = new JScrollPane();
        scrollPane.setBounds(10, 92, 655, 174);
        getContentPane().add(scrollPane);
        
        
        //借书记录表格
        table = new JTable();
        table.addMouseListener(new MouseAdapter() {
            @Override
            public void mousePressed(MouseEvent e) {
                int row = table.getSelectedRow();
                s_idTxt.setText(table.getValueAt(row, 0)+"");
                
                String userName = table.getValueAt(row, 1)+"";
                s_userNameTxt.setText(userName.replaceAll("\(\d*\)", ""));
                String bookName = table.getValueAt(row, 2)+"";
                s_bookNameTxt.setText(bookName.replaceAll("\(\d*\)", ""));
                
            }
        });
        table.setModel(new DefaultTableModel(
            new Object[][] {
                {null, null, null},
            },
            new String[] {
                "u7F16u53F7", "u501Fu9605u4EBA", "u501Fu9605u56FEu4E66"
            }
        ));
        table.getColumnModel().getColumn(0).setPreferredWidth(83);
        table.getColumnModel().getColumn(1).setPreferredWidth(162);
        table.getColumnModel().getColumn(2).setPreferredWidth(187);
        scrollPane.setViewportView(table);
        
        JPanel panel_1 = new JPanel();
        panel_1.setBorder(new TitledBorder(null, "u8868u5355u64CDu4F5C", TitledBorder.LEADING, TitledBorder.TOP, null, null));
        panel_1.setBounds(10, 276, 655, 101);
        getContentPane().add(panel_1);
        panel_1.setLayout(null);
        
        JLabel label_2 = new JLabel("u7F16u53F7uFF1A");
        label_2.setBounds(10, 33, 60, 15);
        panel_1.add(label_2);
        
        s_idTxt = new JTextField();
        s_idTxt.setBounds(91, 30, 66, 21);
        panel_1.add(s_idTxt);
        s_idTxt.setColumns(10);
        
        JLabel label_3 = new JLabel("u501Fu9605u4EBAuFF1A");
        label_3.setBounds(195, 33, 65, 15);
        panel_1.add(label_3);
        
        s_userNameTxt = new JTextField();
        s_userNameTxt.setBounds(270, 30, 132, 21);
        panel_1.add(s_userNameTxt);
        s_userNameTxt.setColumns(10);
        
        JLabel label_4 = new JLabel("u56FEu4E66u540Du79F0uFF1A");
        label_4.setBounds(432, 33, 71, 15);
        panel_1.add(label_4);
        
        s_bookNameTxt = new JTextField();
        s_bookNameTxt.setBounds(513, 30, 132, 21);
        panel_1.add(s_bookNameTxt);
        s_bookNameTxt.setColumns(10);
        
        
        //还书按钮
        JButton jb_return = new JButton("u5F52u8FD8");
        jb_return.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                Connection con = null;
                try {
                    con = dbUtil.getCon();
                    String id = s_idTxt.getText();
                    String bookName = s_bookNameTxt.getText();
                    if(StringUtil.isEmpty(bookName)){
                        JOptionPane.showMessageDialog(null, "请选择要归还书籍记录");
                        return ;
                    }
                    userDao.returnBook(con, id);
                    bookDao.bookReturn(con, bookName);
                    fillTable(null, null);
                } catch (Exception e1) {
                    e1.printStackTrace();
                } finally{
                    try {
                        dbUtil.closeCon(con);
                    } catch (Exception e1) {
                        e1.printStackTrace();
                    }
                }
                
            }
        });
        jb_return.setBounds(10, 68, 635, 23);
        panel_1.add(jb_return);
    }
}

　　界面提供了多级连表查询以及还书接口。

　　6、数据库设计

　　　　1）user表

　　　　2）booktype表

　　　　3）book表

　　　　4）lendbook表

 　　根据数据库所学知识，我们将数据库分为4张表，user表中记录用户信息；booktype表中记录图书分类信息；book表中记录图书信息，同时将book表中的booktypeId关联到booktype表的id上；lendbook为借书信息，其中userid和bookid为两个外键，分别对应user表的id和book表的id。这里应该感谢这学期的数据库课程，让我们在设计表结构的时候免去了不少的麻烦。

　　注：代码注释不是很详细，传至coding时会添加完整注释内容以及数据库文件等(虽然我现在不知道这种工程应该怎么传送到coding   T T )。

　　Conding地址：https://coding.net/u/2013040101068/p/alarm-work/git