Java压缩解压缩工具类

package com.wdy.tools.utils.pressuitl;
 
import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
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.ZipFile;
import java.util.zip.ZipInputStream;
import java.util.zip.ZipOutputStream;
 
import org.apache.commons.logging.Log;
 
import com.wdy.tools.utils.LogUtil;
 
/**
 * 压缩/解压缩工具类（zip格式）
 * 
 * @author wdy
 * @date 2016-08-23
 */
public class PressUtil {
 
 private static final Log log = LogUtil.getLog(PressUtil.class);
 
 
 
 public static void main(String[] args) {
// PressUtil.ZipMultiFile("d:\\nwp_trans\\nwp_h\\", "d:\\nwp_trans\\nwp_h\\wdy.zip");
 String sourceFilePath = "d:\\nwp_trans\\nwp_h\\"; 
   String zipFilePath = "d:\\nwp_trans\\nwp_h\\"; 
   String fileName = "wdy"; 
   boolean flag = PressUtil.fileToZip(sourceFilePath, zipFilePath, fileName);
   if(flag){ 
   log.info("文件打包成功!"); 
   }else{ 
   log.info("文件打包失败!"); 
   } 
 }
 
 /** 
  * 将存放在sourceFilePath目录下的源文件，打包成fileName名称的zip文件，并存放到zipFilePath路径下 
  * @param sourceFilePath :待压缩的文件路径 
  * @param zipFilePath :压缩后存放路径 
  * @param fileName :压缩后文件的名称(不包括扩展名) 
  * @return 
  */ 
 @SuppressWarnings("resource")
 public static boolean fileToZip(String sourceFilePath,String zipFilePath,String fileName){ 
  boolean flag = false; 
  File sourceFile = new File(sourceFilePath); 
  FileInputStream fis = null; 
  BufferedInputStream bis = null; 
  FileOutputStream fos = null; 
  ZipOutputStream zos = null; 
   
  if(sourceFile.exists() == false){ 
   log.info("待压缩的文件目录："+sourceFilePath+"不存在.");
  }else{ 
   try { 
    File zipFile = new File(zipFilePath + "/" + fileName +".zip"); 
    if(zipFile.exists()){ 
     log.info(zipFilePath + "目录下存在名字为:" + fileName +".zip" +"打包文件.");
    }else{ 
     File[] sourceFiles = sourceFile.listFiles(); 
     if(null == sourceFiles || sourceFiles.length<1){ 
      log.info("待压缩的文件目录：" + sourceFilePath + "里面不存在文件，无需压缩.");
     }else{ 
      fos = new FileOutputStream(zipFile); 
      zos = new ZipOutputStream(new BufferedOutputStream(fos)); 
      byte[] bufs = new byte[1024*10]; 
      for(int i=0;i