Jsp页面实现文件上传下载

        FileInputStream inStream = null;
        ZipOutputStream zos = null;
        InputStream is = null;
        String filepath = null;
        try{
         
            if ( fileType == 0 || fileType == 1){
                if ( fileType == 0 ){
                    filepath = downFileName;  
                }else{
                    filepath = zipFilePath + fileName;
                    String[] fileToZip = zipFileNames;
                                   
                    zos=new ZipOutputStream(new FileOutputStream(filepath));
                    ZipEntry ze=null;
                    byte[] buf=new byte[BUFSIZE];
                    int readLen=0;
                    for (int i= 0;i<fileToZip.length;i++){
                        File f= new File(fileToZip[i]);
       
                        ze=new ZipEntry(f.getName());
                        ze.setSize(f.length());
                        ze.setTime(f.lastModified());
       
                        zos.putNextEntry(ze);
                        is=new BufferedInputStream(new FileInputStream(f));
                        while ((readLen=is.read(buf, 0, BUFSIZE))!=-1) {
                            zos.write(buf, 0, readLen);
                        }
                        is.close();
                    }
                    zos.close();
                }
          
                inStream =new FileInputStream(filepath);  
  
                while((rtnPos=inStream.read(buffs)) >0)  
                    response.getOutputStream().write(buffs,0,rtnPos);  
                response.getOutputStream().close();  
                inStream.close();

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