compressdialog.java

文件压缩功能：压缩指定单个文件

package zipCompress;

import java.io.*;
import java.util.zip.*;

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;

/**
 * <p>Title: </p>
 * <p>Description: </p>
 * <p>Copyright: Copyright (c) 2005</p>
 * <p>Company: </p>
 * @author not attributable
 * @version 1.0
 */

public class CompressDialog
    extends JDialog {
  //用于压缩的变量：
  byte[] cache = new byte[1024 * 1024]; //1MB大小的缓冲区
  FileInputStream fin;
  FileOutputStream fout;
  ZipEntry entry;
  ZipOutputStream zout;
  CompressFrame parent;
  String defaultPath;
  String defaultFileName;
  boolean ifInput = false;
  String pFrameDirectry;

  File[] filesToCompress;
  JPanel panel1 = new JPanel();
  JLabel jLabel1 = new JLabel();
  JScrollPane jScrollPane1 = new JScrollPane();
  JTextField jTextFeildPath = new JTextField();
  JButton jButtonCd = new JButton();
  JButton jButtonYes = new JButton();
  JButton jButtonCancel = new JButton();
  JScrollPane jScrollPane2 = new JScrollPane();
  JTextArea jTextAreaProgress = new JTextArea();

  public CompressDialog(Frame frame, String title, boolean modal) {
    super(frame, title, modal);
    parent = (CompressFrame) frame;
    this.pFrameDirectry=parent.getCurrentDirectry();
    try {
      jbInit();
      // pack();
    }
    catch (Exception ex) {
      ex.printStackTrace();
    }
  }

  public CompressDialog() {
    this(null, "", false);
  }

  private void jbInit() throws Exception {
    panel1.setLayout(null);
    jLabel1.setFont(new java.awt.Font("新細明體", 0, 11));
    jLabel1.setDebugGraphicsOptions(0);
    jLabel1.setHorizontalAlignment(SwingConstants.LEADING);
    jLabel1.setHorizontalTextPosition(SwingConstants.LEFT);
    jLabel1.setIcon(new ImageIcon(CompressDialog.class.getResource("addTo.png")));
    jLabel1.setIconTextGap(4);
    jLabel1.setText("添加到：");
    jLabel1.setVerticalAlignment(javax.swing.SwingConstants.BOTTOM);
    jLabel1.setVerticalTextPosition(javax.swing.SwingConstants.CENTER);
    jLabel1.setBounds(new Rectangle(19, 13, 89, 35));
    jScrollPane1.setHorizontalScrollBarPolicy(JScrollPane.
                                              HORIZONTAL_SCROLLBAR_ALWAYS);
    jScrollPane1.setVerticalScrollBarPolicy(JScrollPane.
                                            VERTICAL_SCROLLBAR_NEVER);
    jScrollPane1.setBounds(new Rectangle(17, 57, 230, 39));
    jTextFeildPath.setSelectionEnd(11);
    jTextFeildPath.setText("");
    jButtonCd.setBounds(new Rectangle(253, 57, 67, 25));
    jButtonCd.setFont(new java.awt.Font("新細明體", 0, 11));
    jButtonCd.setText("浏览...");
    jButtonCd.addActionListener(new CompressDialog_jButtonCd_actionAdapter(this));
    jButtonYes.setBounds(new Rectangle(69, 321, 71, 25));
    jButtonYes.setFont(new java.awt.Font("新細明體", 0, 11));
    jButtonYes.setForeground(Color.black);
    jButtonYes.setVerifyInputWhenFocusTarget(true);
    jButtonYes.setText("确定");
    jButtonYes.addActionListener(new CompressDialog_jButtonYes_actionAdapter(this));
    jButtonCancel.setBounds(new Rectangle(195, 321, 71, 25));
    jButtonCancel.setFont(new java.awt.Font("新細明體", 0, 11));
    jButtonCancel.setText("取消");
    jButtonCancel.addActionListener(new CompressDialog_jButtonCancel_actionAdapter(this));
    this.setModal(true);
    this.setResizable(false);
    jScrollPane2.setBounds(new Rectangle(20, 121, 301, 175));
    jTextAreaProgress.setText("");
    getContentPane().add(panel1);
    panel1.add(jLabel1, null);
    panel1.add(jScrollPane1, null);
    panel1.add(jScrollPane2, null);
    panel1.add(jButtonCd, null);
    panel1.add(jButtonYes, null);
    panel1.add(jButtonCancel, null);
    jScrollPane2.getViewport().add(jTextAreaProgress, null);
    jScrollPane1.getViewport().add(jTextFeildPath, null);
    this.initializeKeyValues(parent.getFilesSelected());
  }

  /*设置缺省值**/
  private void initializeKeyValues(File[] files) {
    this.defaultPath = files[0].getAbsolutePath();
    if (!this.defaultPath.endsWith("\\")) {
      this.defaultPath = this.defaultPath.substring(0,
          this.defaultPath.
          lastIndexOf('\\') + 1);
    }
    //以第一个文件名为缺省值：
    String tempName = files[0].getName();
    if (files[0].isFile()) {
      tempName = tempName.substring(0, tempName.lastIndexOf('.'));
    }
    this.defaultFileName = tempName + ".zip";
    this.jTextFeildPath.setText(this.defaultPath + this.defaultFileName);
  }

  /*******构建输出流**********/
  private void constructStreams() {
    try {
      fout = new FileOutputStream(this.defaultPath + this.defaultFileName);
      zout = new ZipOutputStream(fout);
      zout.setMethod(ZipOutputStream.DEFLATED);
      zout.setLevel(Deflater.DEFAULT_COMPRESSION);
    }
    catch (IOException ex) {
      JOptionPane.showMessageDialog(this, "无法创建压缩文件", "压缩文件时出错",
                                    JOptionPane.ERROR_MESSAGE);
      this.dispose();
    }
  }

  /*********检测用户输入***********/
  private boolean validateInput() {
    String userInput = this.jTextFeildPath.getText();
    if (userInput.equals(this.defaultPath + this.defaultFileName)) { //没有输入
      return true;
    }
    this.ifInput = true;
    if (userInput == null || userInput.length() == 0) {
      return false;
    }
    if (!userInput.endsWith(".zip")) {
      return false;
    }
    try {
      File f = new File(userInput);
      f.createNewFile();
      f.delete();
    }
    catch (IOException e) {
      return false;
    }
    return true;
  }

  /*******获取合法输入**********/
  private void getValidInput() {
    if (!ifInput) {
      return;
    }
    String userInput = this.jTextFeildPath.getText();
    this.defaultPath = userInput.substring(0, userInput.lastIndexOf('\\'));
    this.defaultFileName = userInput.substring(userInput.lastIndexOf('\\') + 1);
  }

  private void zipAll(File[] files) {
    for (int i = 0; i < files.length; i++) {
      if (files[i].isDirectory()) {
        zipAll(files[i].listFiles());
      }
      else {
        this.zipOneFile(files[i]);
      }
    }
  }

  private void zipOneFile(File f) {
    try {
      fin = new FileInputStream(f);
      entry = new ZipEntry(f.getAbsolutePath().substring(this.pFrameDirectry.length())); //用getPath()在压缩文件内部创建路径
      entry.setTime(f.lastModified());
      this.jTextAreaProgress.append("正在压缩文件："+entry.getName());
      zout.putNextEntry(entry);
      int amount = fin.read(cache);
      while (amount != -1) {
        zout.write(cache, 0, amount);
        amount = fin.read(cache);
      }
      //关闭fin
      fin.close();
      //写入结束标志
      zout.closeEntry();
    }
    catch (FileNotFoundException ex) {
      JOptionPane.showMessageDialog(this, "文件" + f.getName() + "不存在！",
                                    "压缩文件时出错", JOptionPane.ERROR_MESSAGE);
    }
    catch (IOException ex1) {
      JOptionPane.showMessageDialog(this, "无法创建压缩文件：文件拒绝访问", "压缩文件时出错",
                                    JOptionPane.ERROR_MESSAGE);
    }

  }

  void jButtonYes_actionPerformed(ActionEvent e) {
    if (this.validateInput()) {
      this.getValidInput();
    }
    else {
      this.jTextFeildPath.setText(this.defaultPath + this.defaultFileName);
    }
    File testPath=new File(this.defaultPath);
    if(!testPath.exists()){
      testPath.mkdirs();
    }
    constructStreams();
    zipAll(parent.getFilesSelected());
    parent.reDisplay();
    try {
      this.zout.close();
    }
    catch (IOException ex) {
      JOptionPane.showMessageDialog(this, "无法结束压缩文件：未知原因", "压缩文件时出错",
                                    JOptionPane.ERROR_MESSAGE);
    }
    this.dispose();
  }

  void jButtonCancel_actionPerformed(ActionEvent e) {
    this.dispose();
  }

  private void changeDirectory() {
    JFileChooser chooser = new JFileChooser();
    chooser.setCurrentDirectory(new File(this.defaultPath));
    chooser.setFileSelectionMode(JFileChooser.DIRECTORIES_ONLY);
    chooser.setMultiSelectionEnabled(false);
    chooser.showOpenDialog(this);
    if (chooser.getSelectedFile() == null) {
      return;
    }
    this.defaultPath = chooser.getSelectedFile().getAbsolutePath();
    if(this.defaultPath.indexOf(".")!=-1){
      this.defaultPath=this.defaultPath.substring(0,this.defaultPath.lastIndexOf("\\"));
    }
    if (!this.defaultPath.endsWith("\\")) {
      this.defaultPath += "\\";
    }
    this.jTextFeildPath.setText(this.defaultPath + this.defaultFileName);
  }

  void jButtonCd_actionPerformed(ActionEvent e) {
    this.changeDirectory();
  }
}

class CompressDialog_jButtonYes_actionAdapter
    implements java.awt.event.ActionListener {
  CompressDialog adaptee;

  CompressDialog_jButtonYes_actionAdapter(CompressDialog adaptee) {
    this.adaptee = adaptee;
  }

  public void actionPerformed(ActionEvent e) {
    adaptee.jButtonYes_actionPerformed(e);
  }
}

class CompressDialog_jButtonCancel_actionAdapter
    implements java.awt.event.ActionListener {
  CompressDialog adaptee;

  CompressDialog_jButtonCancel_actionAdapter(CompressDialog adaptee) {
    this.adaptee = adaptee;
  }

  public void actionPerformed(ActionEvent e) {
    adaptee.jButtonCancel_actionPerformed(e);
  }
}

class CompressDialog_jButtonCd_actionAdapter
    implements java.awt.event.ActionListener {
  CompressDialog adaptee;

  CompressDialog_jButtonCd_actionAdapter(CompressDialog adaptee) {
    this.adaptee = adaptee;
  }

  public void actionPerformed(ActionEvent e) {
    adaptee.jButtonCd_actionPerformed(e);
  }
}