博客
关于我
java文件上传带进度条_java文件上传带进度条的
阅读量:804 次
发布时间:2023-01-24

本文共 2056 字,大约阅读时间需要 6 分钟。

file upload controller class for handle multipart file upload requestcom.controller.FileUploadControllerclass FileUploadController implements file upload functionality with progress trackinglog = logger.getLogger(FileUploadController.class)upload method implementation@Controller@RequestMapping("/upload.html")public ModelAndView upload(HttpServletRequest request, HttpServletResponse response) throws Exception {create session instancesession = request.getSession()modelAndView = new ModelAndView()check if request is multipartisMultipart = ServletFileUpload.isMultipartContent(request)if (!isMultipart) {    return modelAndView;}create disk file item factoryFileItemFactory factory = new DiskFileItemFactory();initialize file upload serviceuploadService = new ServletFileUpload(factory);set progress listeneruploadService.setProgressListener(new ProgressListener() {    // progress updating logic    public void update(long bytesRead, long contentLength, int items) {        ProcessInfo info = new ProcessInfo();        info.itemNum = items;        info.readSize = bytesRead;        info.totalSize = contentLength;        info.show = String.format("%d/%d byte", bytesRead, contentLength);        info.rate = (int)(Math.round((float)bytesRead / contentLength * 100));        session.setAttribute("processInfo", info);    }});parse requestitems = uploadService.parseRequest(request)process uploaded itemsforeach (item in items) {    if (item is form field) {        // handle common form fields    } else {        // handle file upload fields        String fileName = item.getName();        String contentType = item.getContentType();        File uploadedFile = new File(("c://" + fileName));        item.write(uploadedFile);    }}return modelAndView}process method for getting progress info@RequestMapping("/process.json", method=RequestMethod.GET)@ResponseBodypublic Object process(HttpServletRequest request, HttpServletResponse response) throws Exception {    return session.getAttribute("processInfo");}class ProcessInfo {    // properties and fields}

转载地址:http://dmeyk.baihongyu.com/

你可能感兴趣的文章
mysql 往字段后面加字符串
查看>>
mysql 快照读 幻读_innodb当前读 与 快照读 and rr级别是否真正避免了幻读
查看>>
MySQL 快速创建千万级测试数据
查看>>
mysql 快速自增假数据, 新增假数据,mysql自增假数据
查看>>
MySql 手动执行主从备份
查看>>
Mysql 批量修改四种方式效率对比(一)
查看>>
Mysql 报错 Field 'id' doesn't have a default value
查看>>
MySQL 报错:Duplicate entry 'xxx' for key 'UNIQ_XXXX'
查看>>
Mysql 拼接多个字段作为查询条件查询方法
查看>>
mysql 排序id_mysql如何按特定id排序
查看>>
Mysql 提示:Communication link failure
查看>>
mysql 插入是否成功_PDO mysql:如何知道插入是否成功
查看>>
Mysql 数据库InnoDB存储引擎中主要组件的刷新清理条件:脏页、RedoLog重做日志、Insert Buffer或ChangeBuffer、Undo Log
查看>>
mysql 数据库中 count(*),count(1),count(列名)区别和效率问题
查看>>
mysql 数据库备份及ibdata1的瘦身
查看>>
MySQL 数据库备份种类以及常用备份工具汇总
查看>>
mysql 数据库存储引擎怎么选择?快来看看性能测试吧
查看>>
MySQL 数据库操作指南:学习如何使用 Python 进行增删改查操作
查看>>
MySQL 数据库的高可用性分析
查看>>
MySQL 数据库设计总结
查看>>