java打包文件夹为zip文件

//待压缩的文件目录
String sourceFile=sourceFilePath+"\\"+userName;
//存放压缩文件的目录
String zipFilePath = sourceFilePath;  
//zip文件名字,不加zip 方法里面有
fileName=“****”

//直接粘贴 
public Object fileZip(String sourceFilePath,String zipFilePath,String fileName){  
       String flag = "";  
       File sourceFile = new File(sourceFilePath);  
       FileInputStream fis = null;  
       BufferedInputStream bis = null;  
       FileOutputStream fos = null;  
       ZipOutputStream zos = null;  
         
       if(sourceFile.exists() == false){  
           System.out.println("待压缩的文件目录："+sourceFilePath+"不存在.");  
       }else{  
           try {  
               File zipFile = new File(zipFilePath + "/" + fileName +".zip");  
               if(zipFile.exists()){  
                   System.out.println(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){  
                       System.out.println("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
                           //创建ZIP实体，并添加进压缩包  
                           ZipEntry zipEntry = new ZipEntry(sourceFiles[i].getName());  
                           zos.putNextEntry(zipEntry);  
                           //读取待压缩的文件并写进压缩包里  
                           fis = new FileInputStream(sourceFiles[i]);  
                           bis = new BufferedInputStream(fis, 1024*10);  
                           int read = 0;  
                           while((read=bis.read(bufs, 0, 1024*10)) != -1){  
                               zos.write(bufs,0,read);  
                           }  
                       }  
                       flag = "";  
                   }  
               }  
           } catch (FileNotFoundException e) {  
               e.printStackTrace();  
               throw new RuntimeException(e);  
           } catch (IOException e) {  
               e.printStackTrace();  
               throw new RuntimeException(e);  
           } finally{  
               //关闭流  
               try {  
                   if(null != bis) bis.close();  
                   if(null != zos) zos.close();  
               } catch (IOException e) {  
                   e.printStackTrace();  
                   throw new RuntimeException(e);  
               }  
           }  
       }  
       return flag;  
   }