JTable简单介绍，以及tableModel的使用

package com.tr.homework;

import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Container;
import java.awt.FlowLayout;
import java.awt.HeadlessException;
import java.awt.event.FocusEvent;
import java.awt.event.FocusListener;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;
import java.lang.reflect.Field;
import java.util.Iterator;
import java.util.LinkedHashMap;
import java.util.List;
import java.util.Map;

import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.SwingConstants;
import javax.swing.event.TableModelEvent;
import javax.swing.event.TableModelListener;
import javax.swing.table.DefaultTableModel;
import javax.swing.table.TableRowSorter;

import com.dao.*;
import com.entity.Login;

public class JTableDemo extends JFrame {
    private JScrollPane jsp;
    private JTable jt;
    private DefaultTableModel tableModel;

    public static void main(String[] args) {
        new JTableDemo();

    }

    public JTableDemo() {
        init();
        setSize(400, 500);
        setLocationRelativeTo(null);
        setVisible(true);
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    }

    private void init() {
        Container con = getContentPane();
        con.setLayout(new BorderLayout());
        createJTable(con);
    }

    public void createJTable(Container con) {
        JLabel jl = new JLabel("用户信息");
        jl.setHorizontalAlignment(SwingConstants.CENTER);
        addData();
        jt = new JTable(tableModel);
        // 用来获得鼠标点击位置的内容
        jt.addMouseListener(new MouseAdapter() {
            public void mouseClicked(MouseEvent e) {

                int selectRow = jt.getSelectedRow();
                // System.out.println(selectRow);
                // int selectcow = jt.getSelectedColumn();
                for (int i = 0; i < jt.getColumnCount(); i++) {
                    System.out.print(jt.getColumnName(i) + ":");
                    System.out.print(jt.getValueAt(selectRow, i) + "\t");
                }
                System.out.println();
                // System.out.println(selectcow);
                // System.out.println(tableModel.getValueAt(selectRow,
                // selectcow));
            }
        });
        jt.setRowHeight(30);// 设置表格的行高
        // jt.setRowSelectionAllowed(false);// 不能直接选中一行
        // jt.setSelectionMode(1);//里面为0只允许选择一个，为1，可以连续选择多个，为2可以任意选择多个
        // jt.setSelectionBackground(Color.red);//选中的背景颜色
        jt.setSelectionForeground(Color.red);// 设置选中的文字颜色
        // jt.setAutoResizeMode(1);
        // 设置表格的自动调整模式，0-关闭自动调整，1-只调整下一列的宽度，2-比例调整其后所有列的宽度，3-只调整最后一列的宽度
        // 4.按比例调整所有列的宽度
        jt.setRowSorter(new TableRowSorter(tableModel));
        // 增加一个排序器
        jsp = new JScrollPane(jt);
        jsp.setViewportView(jt);
        con.add(jl, BorderLayout.NORTH);
        con.add(jsp, BorderLayout.CENTER);
    }

    public void addData() {

        List list = getData();
        Field[] field = Login.class.getDeclaredFields();
        /**
         * 设置标题
         */
        Object columnNames[] = new Object[field.length];
        for (int i = 0; i < field.length; i++) {
            columnNames[i] = field[i].getName();
        }
        /**
         * 填充内容
         */
        Object rowData[][] = new Object[list.size()][];
        for (int i = 0; i < list.size(); i++) {
            Login l = list.get(i);
            Object ob[] = new Object[field.length];
            for (int j = 0; j < field.length; j++) {
                field[j].setAccessible(true);
                try {
                    ob[j] = field[j].get(l);
                } catch (IllegalArgumentException e) {
                    e.printStackTrace();
                    System.out.println("底层字段不可访问");
                } catch (IllegalAccessException e) {
                    e.printStackTrace();
                    System.out.println("对象不是声明字段的实例");
                }// 返回此对象上此字段的值
                rowData[i] = ob;
            }
        }
        /*
         * Object rowData[][] = { { 1, 2, 3 }, { 2, 3, 4 }, { 5, 6, 7 } };
         * Object columnNames[] = { 1, 2, 3 };
         */
        tableModel = new DefaultTableModel(rowData, columnNames);
    }

    public List getData() {
        String sql = "select * from login";
        Map m = new LinkedHashMap();
        m.put(sql, null);
        return new CRUDDAO(Login.class).selectAll(m).get(1);
    }
}