文件压缩

package com.jcsoft.transaction.common.action;

import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.zip.ZipEntry;
import java.util.zip.ZipOutputStream;

/**
 * 压缩文件
 */
public class DownPackAction {
     public static File doZip(String sourceDir, String zipFilePath) 
             throws IOException {
              
              File file = new File(sourceDir);
              File zipFile = new File(zipFilePath);
              ZipOutputStream zos = null;
              try {
               // 创建写出流操作
               OutputStream os = new FileOutputStream(zipFile);
               BufferedOutputStream bos = new BufferedOutputStream(os);
               zos = new ZipOutputStream(bos);
               
               String basePath = null;
               
               // 获取目录
               if(file.isDirectory()) {
                basePath = file.getPath();
               }else {
                basePath = file.getParent();
               }
               
               zipFile(file, basePath, zos);
              }finally {
               if(zos != null) {
                zos.closeEntry();
                zos.close();
               }
              }
              
              return zipFile;
             }

             /** 
              * @param source 源文件
              * @param basePath 
              * @param zos 
              */
             private static void zipFile(File source, String basePath, ZipOutputStream zos) 
             throws IOException {
              File[] files = null;
              if (source.isDirectory()) {
               files = source.listFiles();
              } else {
               files = new File[1];
               files[0] = source;
              }
              
              InputStream is = null;
              String pathName;
              byte[] buf = new byte[1024];
              int length = 0;
              try{
               for(File file : files) {
                if(file.isDirectory()) {
                 pathName = file.getPath().substring(basePath.length() + 1) + "/";
                 zos.putNextEntry(new ZipEntry(pathName));
                 zipFile(file, basePath, zos);
                }else {
                 pathName = file.getPath().substring(basePath.length() + 1);
                 is = new FileInputStream(file);
                 BufferedInputStream bis = new BufferedInputStream(is);
                 zos.putNextEntry(new ZipEntry(pathName));
                 while ((length = bis.read(buf)) > 0) {
                  zos.write(buf, 0, length);
                 }
                }
               }
              }finally {
               if(is != null) {
                is.close();
               }
              }
             }
             public static void main(String[] args) {   
                 try {
                     //将D:\test1文件夹打包到D:\test2并命名为test1.zip
                    doZip("D:\test1","D:\test2\test1.zip"); 
                } catch (IOException e) {
                    e.printStackTrace();
                }   
                }   
}