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:805 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性能优化(2):数据库索引
查看>>
Mysql性能优化(3):分析执行计划
查看>>
Mysql性能优化(4):优化的注意事项
查看>>
Mysql性能优化(5):主从同步原理与实现
查看>>
Mysql性能优化(6):读写分离
查看>>
MySQL性能优化(八)--
查看>>
MySQL性能测试及调优中的死锁处理方法
查看>>
mysql性能测试工具选择 mysql软件测试
查看>>
mysql恢复root密码
查看>>
Mysql悲观锁
查看>>
MySQL慢查询-开启慢查询
查看>>
MySQL慢查询分析和性能优化的方法和技巧
查看>>
MySQL慢查询日志总结
查看>>
Mysql慢查询日志,查询截取分析
查看>>
MySQL慢查询问题排查
查看>>
mysql截取sql语句
查看>>
mysql截取身份证号前几位_EXCEL中怎样截取身份证号前六位数字
查看>>
mysql手工注入
查看>>
MySQL执行SQL文件出现【Unknown collation ‘utf8mb4_0900_ai_ci‘】的解决方案
查看>>
Mysql执行update by id的过程
查看>>