clipboardframe.java

Java灵感编程1-101之21-40

package clipboard;

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
//声明使用剪贴板工具
import java.awt.datatransfer.*;

/**
 * <p>Title: ClipBoard Demo</p>
 * <p>Description: This is a ClipBoard demo</p>
 * <p>Copyright: Copyright (c) 2002</p>
 * <p>Company: d6-125</p>
 * @author Liujun
 * @version 1.0
 */

public class ClipBoardFrame extends JFrame {
  JPanel contentPane;
  BorderLayout borderLayout1 = new BorderLayout();
  JPanel jPanel1 = new JPanel();
  JButton jButton1 = new JButton();
  JButton jButton2 = new JButton();
  JButton jButton3 = new JButton();
  JScrollPane jScrollPane1 = new JScrollPane();
  JTextArea jTextArea1 = new JTextArea();
  //声明剪贴板变量clipboard，并初始化
  Clipboard clipboard = getToolkit().getSystemClipboard();

  //Construct the frame
  public ClipBoardFrame() {
    enableEvents(AWTEvent.WINDOW_EVENT_MASK);
    try {
      jbInit();
    }
    catch(Exception e) {
      e.printStackTrace();
    }
  }
  //Component initialization
  private void jbInit() throws Exception  {
    //setIconImage(Toolkit.getDefaultToolkit().createImage(ClipBoardFrame.class.getResource("[Your Icon]")));
    contentPane = (JPanel) this.getContentPane();
    contentPane.setLayout(borderLayout1);
    this.setSize(new Dimension(400, 300));
    this.setTitle("ClipBoard Frame Demo");
    jButton1.setText("剪切");
    jButton1.addActionListener(new java.awt.event.ActionListener() {
      public void actionPerformed(ActionEvent e) {
        jButton1_actionPerformed(e);
      }
    });
    jButton2.setText("复制");
    jButton2.addActionListener(new java.awt.event.ActionListener() {
      public void actionPerformed(ActionEvent e) {
        jButton2_actionPerformed(e);
      }
    });
    jButton3.setText("粘贴");
    jButton3.addActionListener(new java.awt.event.ActionListener() {
      public void actionPerformed(ActionEvent e) {
        jButton3_actionPerformed(e);
      }
    });
    contentPane.add(jPanel1, BorderLayout.NORTH);
    jPanel1.add(jButton1, null);
    jPanel1.add(jButton2, null);
    jPanel1.add(jButton3, null);
    contentPane.add(jScrollPane1, BorderLayout.CENTER);
    jScrollPane1.getViewport().add(jTextArea1, null);
  }
  //Overridden so we can exit when window is closed
  protected void processWindowEvent(WindowEvent e) {
    super.processWindowEvent(e);
    if (e.getID() == WindowEvent.WINDOW_CLOSING) {
      System.exit(0);
    }
  }

  void jButton1_actionPerformed(ActionEvent e) {
    //剪切选中的文本
    String srcData = jTextArea1.getSelectedText();//得到选中的文本
    jTextArea1.cut();//剪切文本
    if (srcData != null) {
      StringSelection contents = new StringSelection(srcData);
      clipboard.setContents(contents, null);//将得到的文本送入剪贴板
    }
  }

  void jButton2_actionPerformed(ActionEvent e) {
   //复制选中的文本
    String srcData = jTextArea1.getSelectedText();//得到选中的文本
    if (srcData != null) {
      StringSelection contents = new StringSelection(srcData);
      clipboard.setContents(contents,null);//将得到的文本送入剪贴板
    }
  }

  void jButton3_actionPerformed(ActionEvent e) {
     Transferable content = clipboard.getContents(jTextArea1);//从剪贴板中取数据
    int insertPos = jTextArea1.getCaretPosition();// 得到文本框的当前位置
    if (content != null) {
      try {
        String dstData = (String)content.getTransferData(DataFlavor.stringFlavor);//转换数据为文本
	jTextArea1.insert(dstData,insertPos);//插入文本到当前位置
      } catch (Exception ei) {
	  System.out.println("Couldn't get contents in format: "+
	  DataFlavor.stringFlavor.getHumanPresentableName());//若剪贴板中不是文本则打印出错
	  }
    }

  }
}