• Java课程设计---浏览学生(实现根据姓名查询)


    1、修改窗口

     

      

    2、在StudentDao中增加根据姓名查找的方法

    	public List<Student> getStudent(String name)throws SQLException{
    		DbUtil dbUtil = new DbUtil();
    		String sql="select * from tb_student where name LIKE '"+name+"%'";
    		System.out.println(sql);
    		List<Student> list = new ArrayList<Student>();
    		ResultSet rs=dbUtil.executeQuery(sql);
    		while(rs.next()){
    			Student student = new Student();
    			student.setId(rs.getInt("id"));
    			student.setName(rs.getString("name"));
    			student.setSex(rs.getString("sex"));
    			student.setSno(rs.getString("sno"));
    			student.setClassName(rs.getString("classname"));
    			list.add(student);
    		}
    		return list;
    	}

    3、在StudentService中增加服务

    	/**
    	 * 根据姓名模糊查找
    	 * @param name
    	 * @return
    	 * @throws SQLException
    	 */
    	public List<Student> getStudent(String name) throws SQLException {
    		StudentDao studentDao = new StudentDao();
    		return studentDao.getStudent(name);
    }

    4、将窗口和服务绑定

       (1)将表格数据装载分离出来

      fillTable方法

    public void fillTable(List<Student> list) {
    		// 将默认的加载数据去掉,重新定义个表头
    		String[] head = new String[] { "序号", "学号", "姓名", "性别", "班级" };
    		// 创建一个二维数组,5表示列数
    		Object[][] data = new Object[list.size()][5];
    		// 遍历
    		for (int i = 0; i < list.size(); i++) {
    			data[i][0] = list.get(i).getId();
    			data[i][1] = list.get(i).getSno();
    			data[i][2] = list.get(i).getName();
    			data[i][3] = list.get(i).getSex();
    			data[i][4] = list.get(i).getClassName();
    		}
    		// 将数据和表头封装
    		DefaultTableModel datamoModel = new DefaultTableModel(data, head);
    		// 将封装好的数据加载
    		table.setModel(datamoModel);
    	}
    

      修改后的完整代码

    package com.student.view;
    
    import java.awt.EventQueue;
    import java.sql.SQLException;
    import java.util.List;
    
    import javax.swing.JFrame;
    import javax.swing.JPanel;
    import javax.swing.JScrollPane;
    import javax.swing.JTable;
    import javax.swing.border.EmptyBorder;
    import javax.swing.table.DefaultTableModel;
    
    import com.student.model.Student;
    import com.student.service.StudentService;
    import javax.swing.JLabel;
    import javax.swing.JTextField;
    import javax.swing.JButton;
    
    /*
     * 项目名称: 
     * 
     * 文件名称为:ShowStudent.java
     * 文件创建人:daxiang
     * 
     * @author daxiang
     * @version 
     * @time  2018年6月22日 上午8:03:24
     * @copyright daxiang
     */
    public class ShowStudent extends JFrame {
    
    	private static final long serialVersionUID = 1L;
    	private JPanel contentPane;
    	private JTable table;
    	private JTextField textField;
    
    	/**
    	 * Launch the application.
    	 */
    	public static void main(String[] args) {
    		EventQueue.invokeLater(new Runnable() {
    			public void run() {
    				try {
    					ShowTable frame = new ShowTable();
    					frame.setVisible(true);
    				} catch (Exception e) {
    					e.printStackTrace();
    				}
    			}
    		});
    	}
    
    	/**
    	 * Create the frame.
    	 */
    	public ShowStudent() {
    		setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    		setBounds(100, 100, 724, 481);
    		contentPane = new JPanel();
    		contentPane.setBorder(new EmptyBorder(5, 5, 5, 5));
    		setContentPane(contentPane);
    		// 设置无布局
    		contentPane.setLayout(null);
    		// 创建滚动面板
    		JScrollPane scrollPane = new JScrollPane();
    		scrollPane.setBounds(27, 74, 603, 221);
    		contentPane.add(scrollPane);
    		// 创建表格
    		table = new JTable();
    		// 将表格加载到滚动面板
    		scrollPane.setViewportView(table);
    		try {
    			// 创建服务
    			StudentService service = new StudentService();
    			// 查询出所有学生
    			List<Student> list = service.getStudent();
    			// 装载数据
    			fillTable(list);
    
    			JLabel label = new JLabel("请输入学生姓名");
    			label.setBounds(53, 43, 123, 18);
    			contentPane.add(label);
    textField = new JTextField(); textField.setBounds(190, 40, 169, 24); contentPane.add(textField); textField.setColumns(10);
    JButton button = new JButton("查 找"); button.setBounds(394, 39, 113, 27); contentPane.add(button); } catch (SQLException e) { // TODO Auto-generated catch block e.printStackTrace(); }
              setVisible(true); } /** * 表格装载数据 * * @param list */ public void fillTable(List<Student> list) { // 将默认的加载数据去掉,重新定义个表头 String[] head = new String[] { "序号", "学号", "姓名", "性别", "班级" }; // 创建一个二维数组,5表示列数 Object[][] data = new Object[list.size()][5]; // 遍历 for (int i = 0; i < list.size(); i++) { data[i][0] = list.get(i).getId(); data[i][1] = list.get(i).getSno(); data[i][2] = list.get(i).getName(); data[i][3] = list.get(i).getSex(); data[i][4] = list.get(i).getClassName(); } // 将数据和表头封装 DefaultTableModel datamoModel = new DefaultTableModel(data, head); // 将封装好的数据加载 table.setModel(datamoModel); } }

      (2)具体实现

      

     按钮操作代码

    			button.addActionListener(new ActionListener() {
    				public void actionPerformed(ActionEvent e) {
    					try {
    						//获取查询数据
    						//textField.getText().trim()获取文本框数据并且去掉空格
    						List<Student> list1=service.getStudent(textField.getText().trim());
    						//装载到表格
    						fillTable(list1);
    					} catch (SQLException e1) {
    						e1.printStackTrace();
    					}
    				}
    			});
    

      

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  • 原文地址:https://www.cnblogs.com/daxiang2008/p/9212025.html
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