Swing - JTable

JTable

• 元素不可编辑
• 设置Table-Header和Table-Body
• 使用List填充Table

---

一：元素不可编辑

Idea快捷键复习：Shift*2 + Ctrl+O

1> 自定义MyTable类，继承JTable，重写其中的isSellEditable方法

public class MyTable extends JTable {
    @Override
    public boolean isCellEditable(int row, int column) {
        return false;
    }
}

2> 使用子类向上转型初始化父类

public class FrameTest extends JFrame {

    private final JTable table;

    public FrameTest(){
        table = new MyTable();
        table.setAutoResizeMode(JTable.AUTO_RESIZE_ALL_COLUMNS);
        table.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
        // ...

二：设置表头和表内容

如果不将JTable与JScrollPane绑定，那么JTable的标题栏将不会显示

String[] tableHead = {"学号","姓名","性别","年龄","专业"};
Object[][] tableBody = new Object[stu.size()+1][5];

table.setModel(new DefaultTableModel(tableBody,tableHead));

// DefaultTableModel构造函数原型
    /**
     *  Constructs a <code>DefaultTableModel</code> and initializes the table
     *  by passing <code>data</code> and <code>columnNames</code>
     *  to the <code>setDataVector</code>
     *  method. The first index in the <code>Object[][]</code> array is
     *  the row index and the second is the column index.
     *
     * @param data              the data of the table
     * @param columnNames       the names of the columns
     * @see #getDataVector
     * @see #setDataVector
     */
    public DefaultTableModel(Object[][] data, Object[] columnNames) {
        setDataVector(data, columnNames);
    }

三：使用List填充Table

1> Student.java

package xyz.xx.pojo;

public class Student {
    private int sid;
    private String sname;
    private int sage;
    private int ssex;
    private String smajor;

    public Student() { }

    public Student(int sid, String sname, int sage, int ssex, String smajor) {
        this.sid = sid;
        this.sname = sname;
        this.sage = sage;
        this.ssex = ssex;
        this.smajor = smajor;
    }

    public int getSid() {
        return sid;
    }

    public void setSid(int sid) {
        this.sid = sid;
    }

    public String getSname() {
        return sname;
    }

    public void setSname(String sname) {
        this.sname = sname;
    }

    public int getSage() {
        return sage;
    }

    public void setSage(int sage) {
        this.sage = sage;
    }

    public int getSsex() {
        return ssex;
    }

    public void setSsex(int ssex) {
        this.ssex = ssex;
    }

    public String getSmajor() {
        return smajor;
    }

    public void setSmajor(String smajor) {
        this.smajor = smajor;
    }

    @Override
    public String toString() {
        return "Student{" +
                "sid=" + sid +
                ", sname='" + sname + '\'' +
                ", sage=" + sage +
                ", ssex=" + ssex +
                ", smajor='" + smajor + '\'' +
                '}';
    }
}

2> MyTable.java

package xyz.xx.demo;

import javax.swing.*;

public class MyTable extends JTable {
    @Override
    public boolean isCellEditable(int row, int column) {
        return false;
    }
}

3> FrameTest.java

package xyz.xx.demo;

import xyz.xx.pojo.Student;

import javax.swing.*;
import javax.swing.table.DefaultTableModel;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;

public class FrameTest extends JFrame {

    private final JTable table;

    public FrameTest(){
        table = new MyTable();
        table.setAutoResizeMode(JTable.AUTO_RESIZE_ALL_COLUMNS);
        table.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);


        List<Student> aList = new ArrayList<>();
        aList.add(new Student(1,"小明",18,0,"软件工程"));
        aList.add(new Student(2,"小朋",19,0,"软件工程"));
        aList.add(new Student(3,"小明明",25,1,"软件工程"));
        aList.add(new Student(4,"小明朋",11,0,"软件工程"));


        this.fillTable(aList);


        this.setTitle("测试窗体");
        this.setBounds(100,100,300,300);
        this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        this.setResizable(false);
        this.setVisible(true);

    }

    /**
     * 使用List<Student> 内容填充Table
     * @param stu
     */
    public void fillTable(List<Student> stu){
        String[] tableHead = {"学号","姓名","性别","年龄","专业"};
        Object[][] tableBody = new Object[stu.size()+1][5];

        Iterator<Student> iterator = stu.iterator();
        int current = 0;
        while(iterator.hasNext()){
            Student temp = iterator.next();
            tableBody[current][0] = temp.getSid();
            tableBody[current][1] = temp.getSname();
            if(temp.getSsex()==0) {
                tableBody[current][2] = "女";
            }else{
                tableBody[current][2] = "男";
            }
            tableBody[current][3] = temp.getSage();
            tableBody[current][4] = temp.getSmajor();

            current++;
        }
        // 如果不将JTable与JScrollPane绑定，那么JTable的标题栏将不会显示
        table.setModel(new DefaultTableModel(tableBody,tableHead));
        JScrollPane jsp = new JScrollPane(table);
        this.add(jsp);
    }

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