httpURLConnection 模拟post请求 发送图片 在Action中怎么接？

[zhonghuaweixu]

httpURLConnection 模拟post请求 发送图片 在Action中怎么接？

 public  String uploadBitmap1(String urlString,byte[] imageBytes){
			String endString = "\r\n";
			String twoHyphen = "--";
			String boundary = "*****";
			
			try {
				URL url = new URL(urlString);
				HttpURLConnection con = (HttpURLConnection)url.openConnection();
				//con.setRequestProperty("content-type", "text/html");
				//允许input、Output,不使用Cache
				con.setDoInput(true);
				con.setDoOutput(true);
				con.setUseCaches(false);
				
				//设置传送的method=POST
				con.setRequestMethod("POST");
				
				//setRequestProperty
				con.setRequestProperty("Connection", "Keep-Alive");
				con.setRequestProperty("Charset", "utf-8");
				con.setRequestProperty("Content-Type", "multipart/form-data;boundary="+boundary);
				
				//设置DataOutputStream
				DataOutputStream dsDataOutputStream = new DataOutputStream(con.getOutputStream());
				dsDataOutputStream.writeBytes(twoHyphen + boundary + endString);
				dsDataOutputStream.writeBytes("Content-Disposition:form-data;" + "name=\"upload\";filename=\"" +
						"11.jpg\"" + endString);
				dsDataOutputStream.writeBytes(endString);
				
				//取得文件的FileInputStream
				dsDataOutputStream.write(imageBytes,0,imageBytes.length);
				
				dsDataOutputStream.writeBytes(endString);
				dsDataOutputStream.writeBytes(twoHyphen + boundary + twoHyphen + endString);

				dsDataOutputStream.close();
				
				int cah = con.getResponseCode();
				if(cah == 200){
					InputStream isInputStream = con.getInputStream();
					int ch;
					StringBuffer buffer = new StringBuffer();
					while((ch = isInputStream.read()) != -1){
						buffer.append((char)ch);
					}
					return buffer.toString();
				}else{
					return "false";
				}
			} catch (Exception e) {
				e.printStackTrace();
			}
			return "false";
		}

服务器 action中代码

final long MAX_SIZE = 3 * 1024 * 1024;// 设置上传文件最大为 3M
		
		HttpServletRequest request = ServletActionContext.getRequest (); 
		DiskFileItemFactory dfif = new DiskFileItemFactory();
		  dfif.setSizeThreshold(4096);// 设置上传文件时用于临时存放文件的内存大小,这里是4K.多于的部分将临时存在硬盘
		  dfif.setRepository(new File(request.getRealPath("/")
		    + "ImagesUploadTemp"));// 设置存放临时文件的目录,web根目录下的ImagesUploadTemp目录

		  // 用以上工厂实例化上传组件
		  ServletFileUpload sfu = new ServletFileUpload(dfif);
		  // 设置最大上传尺寸
		  sfu.setSizeMax(MAX_SIZE);
		  // 从request得到 所有 上传域的列表
		  System.out.println();
		  List fileList = null;
		  try {
		   fileList = sfu.parseRequest(request);
		  } catch (FileUploadException e) {// 处理文件尺寸过大异常

		   e.printStackTrace();
		  }

接受不到啊
异常信息
2010-09-02 17:23:58 [org.apache.struts2.interceptor.FileUploadInterceptor]-[ERROR] Could not find a Content-Type for upload. Verify that a valid file was submitted.

因为我需要在手机上上传图片 要在网站中接受 可是上面的代码如果在Servlet中就可以接受到文件可是在Action中就被拦截 各位 有哪位懂得 给我看看 帮帮忙 谢谢了

[dr_lou]

http://www.javaeye.com/problems/22318

[zhonghuaweixu]

我上传的是的image图像 这个不是类型问题

[nickycheng]

multipart/form-data的一个文件段应该大致如下，检查下吧，你构造的段落应该是不符合标准的。缺少Content-Type。


------------------------------8cd19635feab242
Content-Disposition: form-data; name="file0"; filename="e:\xx\Release\user\logo.jpg"
Content-Type: application/octet-stream

<文件二进制内容>

[nickycheng]

参考

buff.append("Content-Disposition: form-data; name=\"").append(fileField)
    .append("\"; filename=\"").append(fileName).append("\"\r\n")
    .append("Content-Type: ").append(fileType).append("\r\n\r\n");

[closewbq]

参考：http://lapulande.javaeye.com/blog/719581