copyfileframe.java

Java灵感编程1-101之41-60

package copyfile;

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import com.borland.jbcl.layout.*;
import java.io.*;

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

public class CopyFileFrame extends JFrame {
  JPanel contentPane;
  XYLayout xYLayout1 = new XYLayout();
  JButton jButton1 = new JButton();
  JButton jButton2 = new JButton();
  JTextArea jTextArea1 = new JTextArea();
  JLabel jLabel1 = new JLabel();
  //定义源文件集和目标文件目录
  File [] source ;
  File target = null;

  //Construct the frame
  public CopyFileFrame() {
    enableEvents(AWTEvent.WINDOW_EVENT_MASK);
    try {
      jbInit();
    }
    catch(Exception e) {
      e.printStackTrace();
    }
  }
  //Component initialization
  private void jbInit() throws Exception  {
    //setIconImage(Toolkit.getDefaultToolkit().createImage(CopyFileFrame.class.getResource("[Your Icon]")));
    contentPane = (JPanel) this.getContentPane();
    jButton1.setText("选择源文件");
    jButton1.addActionListener(new java.awt.event.ActionListener() {
      public void actionPerformed(ActionEvent e) {
        jButton1_actionPerformed(e);
      }
    });
    contentPane.setLayout(xYLayout1);
    this.setSize(new Dimension(363, 219));
    this.setTitle("Copy File Frame Demo");
    jButton2.setText("选择目标文件");
    jButton2.addActionListener(new java.awt.event.ActionListener() {
      public void actionPerformed(ActionEvent e) {
        jButton2_actionPerformed(e);
      }
    });
    jTextArea1.setBackground(Color.lightGray);
    jTextArea1.setLineWrap(true);
    contentPane.add(jTextArea1,      new XYConstraints(168, 11, 187, 147));
    contentPane.add(jLabel1,      new XYConstraints(7, 160, 353, 26));
    contentPane.add(jButton2, new XYConstraints(23, 89, 118, -1));
    contentPane.add(jButton1, new XYConstraints(23, 31, 118, 28));
  }
  //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) {
      JFileChooser JFileCh = new JFileChooser();//创建文件对话框
      JFileCh.setMultiSelectionEnabled(true);//设置可多选文件属性
    int returnVal = JFileCh.showOpenDialog(this);//显示文件对话框
    if(returnVal == JFileChooser.APPROVE_OPTION){
       source = JFileCh.getSelectedFiles();//得到源文件集
       jTextArea1.setText("选择了文件：\n");
      for(int i=0;i<source.length;i++){//显示选择了的文件列表
       jTextArea1.append(source[i].getPath()+"\n");
       }//end for
    }//end if
    else
        jTextArea1.setText("你没有选择文件");
    }

  void jButton2_actionPerformed(ActionEvent e) {
    JFileChooser JFileCh = new JFileChooser();//创一个文件对话框选择目标文件
    String filepath = null;
    int returnVal = JFileCh.showSaveDialog(this);//显示文件对话框选择目标文件
    if(returnVal == JFileChooser.APPROVE_OPTION){//当选择好目标文件后
     target = JFileCh.getSelectedFile();//得到目标文件
     filepath = target.getPath();//给filepath赋值为目标文件串
     if(source !=null){
       try{
       if(source.length>1){//如果复制多个文件，则需要改变目标文件为输出目录
        if(!target.isDirectory())target=target.getParentFile();
       for(int k=0;k<source.length;k++){//根据输入的文件集，创建输入流
           File NewFile1=new File(target,source[k].getName());
       if(NewFile1.createNewFile()){
          jLabel1.setText("正在复制文件："+target.getPath()+"...");
          FileInputStream FileIn=new FileInputStream(source[k]);//创建输入流
          DataInputStream in = new DataInputStream(FileIn);
          FileOutputStream fileout =  new FileOutputStream(NewFile1);//定义输出流
          DataOutputStream out = new DataOutputStream(fileout);
          int c;
          while((c = in.read()) != -1)//写入流
            out.write(c);
          in.close();//关闭一个输入流
          out.close();//关闭输出流，复制完成
          JOptionPane.showMessageDialog(this, "文件复制成功："+NewFile1.getPath());//例外，显示出错信息。
          jLabel1.setText("文件复制成功："+target.getPath());
           }
           else
          jLabel1.setText("文件建立失败："+target.getPath());
           }//end for
         }//end if Length >1
        else{
          jLabel1.setText("正在复制文件："+target.getPath()+"...");
          int   k=0;//只复制一个文件
          FileInputStream FileIn=new FileInputStream(source[k]);
          DataInputStream in = new DataInputStream(FileIn);
          FileOutputStream fileout =  new FileOutputStream(target);//定义输出流
          DataOutputStream out = new DataOutputStream(fileout);
          int c;
          while((c = in.read()) != -1)//写入流
            out.write(c);
          in.close();//关闭一个输入流
          out.close();//关闭输出流，复制完成
          jLabel1.setText("文件复制成功："+target.getPath());
          }//end else
        }catch(Exception ei){
          jLabel1.setText("文件复制失败："+target.getPath());
          }
      }
      else
        jLabel1.setText("请先选择需要复制的文件");
     }
  }
}