upload.parseRequest为空

转载:http://blog.csdn.net/happywzc110/article/details/7819037
[java] view plaincopy

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

转载:http://blog.csdn.net/happywzc110/article/details/7819037

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！

[java] view plaincopy

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.         }  
17.   
18.         SimpleDateFormat df = new SimpleDateFormat("yyyyMMddHHmmss");  
19.         String newFileName = df.format(new Date()) + "_" + new Random().nextInt(1000) + "." + fileExt;  
20.   
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.             }    
30.     
31.             in.close();    
32.             out.close();    
33.         } catch (FileNotFoundException ex) {    
34.             ex.printStackTrace();    
35.         } catch (IOException ex) {    
36.             ex.printStackTrace();    
37.         }    
    

转载:http://blog.csdn.net/happywzc110/article/details/7819037