java实现文件的压缩下载

    String[] names={ "one.jpg" , "two.jpg" , "three.jpg" , "four.jpg" };
    //四个文件流
    FileInputStream input1 = new FileInputStream( new File( "文件路径" ));
    FileInputStream input2 = new FileInputStream( new File( "文件路径" ));
    FileInputStream input3 = new FileInputStream( new File( "文件路径" ));
    FileInputStream input4 = new FileInputStream( new File( "文件路径" ));
    FileInputStream[] inputs={input1,input2,input3,input4};
    //ZIP打包图片
    File zipFile = new File( "压缩文件存放路径" );
    byte [] buf = new byte [ 1024 ];
    int len;
    ZipOutputStream zout= new ZipOutputStream( new FileOutputStream(zipFile));
    for ( int i = 0 ; i < inputs.length; i++) {
      FileInputStream in =inputs[i];
      zout.putNextEntry( new ZipEntry(names[i]));
      while ((len = in.read(buf)) > 0 ) {
        zout.write(buf, 0 , len);
      }
      zout.closeEntry();
      in.close();
    }
    zout.close();
    //下载图片
    FileInputStream zipInput = new FileInputStream(zipFile);
    OutputStream out = response.getOutputStream();
    response.setContentType( "application/octet-stream" );
    response.setHeader( "Content-Disposition" , "attachment; filename=images.zip" );
    while ((len=zipInput.read(buf))!= - 1 ){
      out.write(buf, 0 ,len);
    }
    zipInput.close();
    out.flush();
    out.close();
    //删除压缩包
    zipFile.delete();