转：upload.parseRequest为空

最新推荐文章于 2021-10-13 11:07:48 发布

weixin_30653023

最新推荐文章于 2021-10-13 11:07:48 发布

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原文链接：http://www.cnblogs.com/blueherb/p/3998583.html

FileItemFactory factory = new DiskFileItemFactory();  
ServletFileUpload upload = new ServletFileUpload(factory);  
upload.setHeaderEncoding("UTF-8");  
List items = upload.parseRequest(request);

上传是items一直是空list。导致原因是struts2把原始的原来S2为简化上传功能，把所有的enctype="multipart/form-data"表单做了wrapper最后把HttpServletResquest封装成 org.apache.struts2.dispatcher.multipart.MultiPartRequestWrapper 怪不得我的 ServletFileUpload.parseRequest(request)不行！！！

看我怎么改！废话不多说，直接贴代码

1. MultiPartRequestWrapper wrapper = (MultiPartRequestWrapper) request;
2. File file = wrapper.getFiles("imgFile")[0];
3. String fileName = wrapper.getFileNames("imgFile")[0];
4. //检查文件大小
5. if(file.length() > maxSize){
6. String temStr= "上传文件大小超过限制。";
7. this.writeResponse(response, temStr);
8. return;
9. }
10. //检查扩展名
11. String fileExt = fileName.substring(fileName.lastIndexOf(".") + 1).toLowerCase();
12. if(!Arrays.<String>asList(extMap.get(dirName).split(",")).contains(fileExt)){
13. String temStr= "上传文件扩展名是不允许的扩展名。\n只允许" + extMap.get(dirName) + "格式。";
14. this.writeResponse(response, temStr);
15. return;
16. }
18. SimpleDateFormat df = new SimpleDateFormat("yyyyMMddHHmmss");
19. String newFileName = df.format(new Date()) + "_" + new Random().nextInt(1000) + "." + fileExt;
21. try {
22. InputStream in = new FileInputStream(file);
23. File uploadFile = new File(savePath, newFileName);
24. OutputStream out = new FileOutputStream(uploadFile);
25. byte[] buffer = new byte[1024 * 1024];
26. int length;
27. while ((length = in.read(buffer)) > 0) {
28. out.write(buffer, 0, length);
29. }
31. in.close();
32. out.close();
33. } catch (FileNotFoundException ex) {
34. ex.printStackTrace();
35. } catch (IOException ex) {
36. ex.printStackTrace();
37. }