jtable checkbox render

最新推荐文章于 2021-02-27 13:42:24 发布

转载最新推荐文章于 2021-02-27 13:42:24 发布 · 1.1k 阅读

文章标签：

#object #null #table #string #c #class

本文展示如何在Java中使用JTable创建一个交互式的表格，并实现了选择所有、拖拽行等功能，包括如何在表格中设置复选框进行多选操作，以及鼠标点击事件触发的批量操作。

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package com.ui;

import java.awt.Component;
import java.awt.Graphics;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.ItemEvent;
import java.awt.event.ItemListener;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.beans.PropertyChangeEvent;
import java.beans.PropertyChangeListener;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;
import java.util.Random;

import javax.swing.DefaultCellEditor;
import javax.swing.JCheckBox;
import javax.swing.JFrame;
import javax.swing.JTable;
import javax.swing.event.ChangeEvent;
import javax.swing.event.ChangeListener;
import javax.swing.table.DefaultTableModel;
import javax.swing.table.TableCellRenderer;
import javax.swing.table.TableModel;

public class TestJtable extends JFrame{

private JCheckBox jCheckBox = new JCheckBox();
private Map<Integer,JCheckBox> checkBoxes = new HashMap<Integer, JCheckBox>();
final TestJtable testJtable = this;
TableModel tableModel = null;
Object[][] datas = {
   {"","a","b","c"},
   {"","a1","b1","c1"},
   {"","a2","b2","c2"},
   {"","a3","b3","c3"},
   };
final String[] column = {"checkBox","C_1" , "C_2","C_3"};

public TestJtable(){
  this.setBounds(300, 300, 300, 300);
  layoutCompent();
  this.setVisible(true);
}

public void layoutCompent(){

  tableModel = new DefaultTableModel(datas,column);
  final JTable jtable = new JTable(tableModel);
  DefaultCellEditor cde = new DefaultCellEditor(new JCheckBox()){
   @Override
   public Component getTableCellEditorComponent(JTable table, Object value, boolean isSelected, int row, int column) {
    if(value != null && value instanceof JCheckBox){
     return (Component) value;
    }
    return super.getTableCellEditorComponent(table, value, isSelected, row, column);
   }
  };
  jtable.getColumn("checkBox").setCellEditor(cde);
  jtable.getColumn("checkBox").setCellRenderer(new TableCellRenderer(){

   public Component getTableCellRendererComponent(JTable table, Object value, boolean isSelected, boolean hasFocus,
     int row, int column) {
    JCheckBox jcb = checkBoxes.get(row);
    if(jcb == null){
     jcb = new JCheckBox();
    }
    if(value != null ){
     jcb.setSelected(new Boolean(value.toString()));

     return jcb;
    }

    return jcb;
   }

  });
  jtable.getColumn("checkBox").setMaxWidth(20);
  jtable.addMouseListener(new MouseAdapter(){

   int dragStartRow = 0;
   int dragEndRow = 0;

   public void mouseClicked(MouseEvent e) {

    int selectAll = jtable.getSelectedColumn();
    if(selectAll == 0){
     for(int i =1 ; i<3 ; i++){
      Boolean isSelect = new Boolean(jtable.getModel().getValueAt(i, 0).toString());
      jtable.getModel().setValueAt(!isSelect, i, 0);
      System.out.println(isSelect);
     }
    }
    System.out.println("cc"+jtable.getSelectedRow());
   }

   @Override
   public void mousePressed(MouseEvent e) {
    dragStartRow = jtable.rowAtPoint(e.getPoint());
    System.out.println("dragStartRow : "+dragStartRow);
   }

   @Override
   public void mouseReleased(MouseEvent e) {
    // TODO Auto-generated method stub
    dragEndRow = jtable.rowAtPoint(e.getPoint());
    System.out.println("dragEndRow:"+dragEndRow);
    for(int i = 0 ; i<datas.length;i++){
     jtable.getModel().setValueAt("false", i, 0);
    }
    for(int i = dragStartRow;i<=dragEndRow;i++){
     jtable.getModel().setValueAt("true", i, 0);
    }
    System.out.println("mouseReleased");
   }
  });
  this.add(jtable);
}

public static void main(String[] args) {
  TestJtable tj = new TestJtable();
}

}