zip解压文件：

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

public class UnzipTest {
     public static void main(String[] args) {
          if (args.length != 1) {
               System.out.println("请输入正确参数：java UnzipTest 需解压的文件(e.g. d:/test.zip)");
          } else {
               Unzip unzip = new Unzip();
               if (unzip.unzip(args[0])) {
                    System.out.println("文件解压成功。");
               } else {
                    System.out.println("文件解压失败。");
               }
          }    
     }
}

class Unzip {
     public Unzip() {}

     /*
     * @param srcZipFile 需解压的文件名
     * <span class="referer">@return</span>  如果解压成功返回true
     */
     public boolean unzip(String srcZipFile) {
          boolean isSuccessful = true;
          try {
               BufferedInputStream bis = new BufferedInputStream(new FileInputStream(srcZipFile));
               ZipInputStream zis = new ZipInputStream(bis);

               BufferedOutputStream bos = null;

               //byte[] b = new byte[1024];
               ZipEntry entry = null;
               while ((entry=zis.getNextEntry()) != null) {
                    String entryName = entry.getName();
                    bos = new BufferedOutputStream(new FileOutputStream("d:/" + entryName));
                    int b = 0;
                    while ((b = zis.read()) != -1) {
                         bos.write(b);
                    }
                    bos.flush();
                    bos.close();
               }
               zis.close();
          } catch (IOException e) {
               isSuccessful = false;
          }
          return isSuccessful;
     }
}

zip压缩文件：

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

public class ZipTest {
     public static void main(String[] args) {
          if (args.length < 1) {
               System.out.println("请输入参数：javac ZipTest 需压缩的文件名及路径 保存的文件名及路径。(e.g. c:/test.txt)");
          } else {
               ZipCompressor compressor = new ZipCompressor();
               boolean isSuccessful= compressor.zipCompress(args, args[args.length - 1]);
               if (isSuccessful) {
                    System.out.println("文件压缩成功。");
               } else {
                    System.out.println("文件压缩失败。");
               }
          }
     }
}

class ZipCompressor {
     public ZipCompressor() {}

     /**@param srcFiles 需压缩的文件路径及文件名
     * @param desFile 保存的文件名及路径
     * <span class="referer">@return</span>  如果压缩成功返回true
     */
     public boolean zipCompress(String[] srcFiles, String desFile) {
          boolean isSuccessful = false;

          String[] fileNames = new String[srcFiles.length-1];
          for (int i = 0; i < srcFiles.length-1; i++) {
               fileNames[i] = parse(srcFiles[i]);
          }

          try {
                    BufferedOutputStream bos = new BufferedOutputStream(new FileOutputStream(desFile));
                    ZipOutputStream zos = new ZipOutputStream(bos);
                    String entryName = null;
                    entryName = fileNames[0];

                    for (int i = 0; i < fileNames.length; i++) {
                         entryName = fileNames[i];

                         // 创建Zip条目
                         ZipEntry entry = new ZipEntry(entryName);
                         zos.putNextEntry(entry);

                         BufferedInputStream bis = new BufferedInputStream(new FileInputStream(srcFiles[i]));

                         byte[] b = new byte[1024];

                         while (bis.read(b, 0, 1024) != -1) {
                              zos.write(b, 0, 1024);
                         }
                         bis.close();
                         zos.closeEntry();
                    }

                    zos.flush();
                    zos.close();
                    isSuccessful = true;
          } catch (IOException e) {
          }

          return isSuccessful;
     }


     // 解析文件名
     private String parse(String srcFile) {
          int location = srcFile.lastIndexOf("/");
          String fileName = srcFile.substring(location + 1);
          return fileName;
     }
}