Swing入门级项目全程实录第3讲

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1、增加数据表t_booktype

 

     1.1创建数据表t_booktype

 

     1.2创建数据表项id int pk auto、bookTypeName varchar 20、bookTypeDesc varchar 20

 

2、创建BookTypeModel

 

     2.1创建BookType类

 

     2.2构造set、get方法

/**
     * @return the id
     */
    public int getId() {
        return id;
    }
    /**
     * @param id the id to set
     */
    public void setId(int id) {
        this.id = id;
    }
    /**
     * @return the bookTypeName
     */
    public String getBookTypeName() {
        return bookTypeName;
    }
    /**
     * @param bookTypeName the bookTypeName to set
     */
    public void setBookTypeName(String bookTypeName) {
        this.bookTypeName = bookTypeName;
    }
    /**
     * @return the bookTypeDesc
     */
    public String getBookTypeDesc() {
        return bookTypeDesc;
    }
    /**
     * @param bookTypeDesc the bookTypeDesc to set
     */
    public void setBookTypeDesc(String bookTypeDesc) {
        this.bookTypeDesc = bookTypeDesc;
    }

3、创建Panel控件

 

     3.1在MainFrm中创建Panel控件，名称改为jp_table;

 

4、创建BookTypeAddInterFrm

 

     4.1创建BookTypeAddInterFrm，title图书类别添加

 

     4.2添加2个jLable、1个jTextField、1个jTextAreaField、2个jButton控件

 

     4.3修改控件属性并美化

 

5、在MainFrm添加BookTypeAddInterFrm

BookTypeAddInterFrm bookTypeAddInterFrm=new BookTypeAddInterFrm();
        bookTypeAddInterFrm.setVisible(true);
        jp_table.add(bookTypeAddInterFrm);

6、BookTypeAddInterFrm添加、重置实现

 

     6.1重置实现

private void resetValue() {
        jt_booktypename.setText("");
        jt_booktypedesc.setText("");
    }

     6.2添加实现

          

          6.2.1创建BookTypeDao，添加bookTypeAdd方法

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();
    }

          6.2.2获取数据，并封装，重建构造器 

String bookTypeName=jt_booktypename.getText();
        String bookTypeDescString=jt_booktypedesc.getText();
        
        if(StringUtil.isEmpty(bookTypeName)){
            JOptionPane.showMessageDialog(null, "图书类别名称不能为空");
            return;
        }
        
        BookType bookType=new BookType(bookTypeName,bookTypeDescString);
        

public BookType() {
        super();
        // TODO Auto-generated constructor stub
    }
    public BookType(String bookTypeName, String bookTypeDesc) {
        super();
        this.bookTypeName = bookTypeName;
        this.bookTypeDesc = bookTypeDesc;
    }

　　 6.2.3建立数据库连接，实现添加数据

DbUtil dbUtil=new DbUtil();
    BookTypeDao bookTypeDao=new BookTypeDao();    

Connection con=null;
        try {
            con=dbUtil.getCon();
            int n=bookTypeDao.bookTypeAdd(con, bookType);
            if(n==1){
                JOptionPane.showMessageDialog(null, "图书类别添加成功");
                resetValue();
            }else{
                JOptionPane.showMessageDialog(null, "图书类别添加失败");
            }
        } catch (Exception e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
            JOptionPane.showMessageDialog(null, "图书类别添加失败");
        }finally{
            try {
                dbUtil.closeCon(con);
            } catch (Exception e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
        }