spring mvc word文件上传之后可预览的实现方法或者步骤
你好!springmvc文件上传1.加入jar包:commons-fileupload-1.2.2.jar commons-io-2.0.1.jar lperson.java中加属性,实现get ,set方法 private String photoPath;2.创建WebRoot/upload目录,存放上传的文件1 2 method="post" 3 modelAttribute="person" 4 enctype="multipart/form-data">5 6 7 name: 8 age: 9 photo: 上面第9行文件上传框,不能和实体对象属性同名,类型不同 controller配置1 12、文件上传功能实现 配置文件上传解析器2 @RequestMapping(value={"/saveOrUpdate"},method=RequestMethod.POST)3 public String saveOrUpdate(Person p,4 @RequestParam("photo") MultipartFile file,5 HttpServletRequest request6 ) throws IOException{7 if(!file.isEmpty()){8 ServletContext sc = request.getSession().getServletContext();9 String dir = sc.getRealPath(“/upload”); //设定文件保存的目录10 11 String filename = file.getOriginalFilename(); //得到上传时的文件名12 FileUtils.writeByteArrayToFile(new File(dir,filename), file.getBytes());13 14 p.setPhotoPath(“/upload/”+filename); //设置图片所在路径15 16 System.out.println("upload over. "+ filename);17 } 18 ps.saveOrUpdate(p); 19 return "redirect:/person/list.action"; //重定向20 }3.文件上传功能实现 spring-mvc.xml 配置文件上传解析器1 2 3 class="org.springframework.web.multipart.commons.CommonsMultipartResolver">4 5 6 7 maxUploadSize以字节为单位:10485760 =10M id名称必须这样写1 映射资源目录2 随即文件名常用的三种方式:文件上传功能(增强:防止文件重名覆盖) fileName = UUID.randomUUID().toString() + extName; fileName = System.nanoTime() + extName; fileName = System.currentTimeMillis() + extName;1 if(!file.isEmpty()){2 ServletContext sc = request.getSession().getServletContext();3 String dir = sc.getRealPath("/upload");4 String filename = file.getOriginalFilename();5 6 7 long _lTime = System.nanoTime();8 String _ext = filename.substring(filename.lastIndexOf("."));9 filename = _lTime + _ext;10 11 FileUtils.writeByteArrayToFile(new File(dir,filename), file.getBytes());12 13 p.setPhotoPath("/upload/"+filename);14 15 System.out.println("upload over. "+ filename);16 } 图片显示 personList.jsp1 ${p.photoPath}
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