Servlet下得不到参数

[贪睡的兔子]

我客户端用

public static String sendRequest(String url, Map<String, String> params,
			Map<String, File> files) throws Exception {
		HttpURLConnection conn = (HttpURLConnection) new URL(url)
				.openConnection();
		String BOUNDARY = java.util.UUID.randomUUID().toString();
		String PREFIX = "--", LINEND = "\r\n";
		String MULTIPART_FROM_DATA = "application/octet-stream";
		String CHARSET = "UTF-8";

		conn.setConnectTimeout(5 * 1000);
		conn.setRequestMethod("POST");
		conn.setRequestProperty("Charset", "UTF-8");
		conn.setRequestProperty("Connection", "Keep-Alive");
		conn.setDoOutput(true);
		conn.setDoInput(true);
		conn.setUseCaches(false);
		conn.setRequestProperty("Content-Type", MULTIPART_FROM_DATA
				+ ";boundary=" + BOUNDARY);

		// 首先组拼文本类型的参数

		StringBuilder sb = new StringBuilder();
		System.out.println(url);
		DataOutputStream outStream = new DataOutputStream(conn.getOutputStream());

	//	outStream.write(sb.toString().getBytes());
		// 发送文件数据

		if (files != null)
			for (Map.Entry<String, File> file : files.entrySet()) {
				StringBuilder sb1 = new StringBuilder();
				sb1.append(PREFIX);
				sb1.append(BOUNDARY);
				sb1.append(LINEND);
				sb1.append("Content-Disposition: form-data; name=\"file\"; filename=\""
						+ file.getKey() + "\"" + LINEND);
				sb1.append("Content-Type: application/octet-stream; charset="
						+ CHARSET + LINEND);
				sb1.append(LINEND);
				outStream.write(sb1.toString().getBytes());
				InputStream is = new FileInputStream(file.getValue());
				byte[] buffer = new byte[1024];
				int len = 0;
				while ((len = is.read(buffer)) != -1) {
					outStream.write(buffer, 0, len);
				}
				is.close();
				outStream.write(LINEND.getBytes());
			}
			byte[] end_data = (PREFIX + BOUNDARY + PREFIX + LINEND).getBytes();
			outStream.write(end_data);
			outStream.flush();

			int res = conn.getResponseCode();
			System.out.println("response Code==="+res);
			if (res == 200) {
				InputStream in = conn.getInputStream();
				int ch;
				StringBuilder sb2 = new StringBuilder();
				BufferedReader bw=new BufferedReader(new InputStreamReader(in,CHARSET));
				String line="";
				
				while((line=bw.readLine())!=null){
					sb2.append(line);
				}
				System.out.println(sb2);
				in.close();
				return sb2.toString();
			}

			outStream.close();
			conn.disconnect();
			return null;
	}

向服务器 发数据 服务器用servlet 得不到 添加的参数
改用struts能直接得到添加的参数， 方法应该没问题，就是servlet下 加的参数全部得不到 ，是不是要另外解析的

[贪睡的兔子]

传参数那块

	StringBuilder sb = new StringBuilder();
	    for (Map.Entry<String, String> entry : params.entrySet())
	    {
	        sb.append(PREFIX);
	        sb.append(BOUNDARY);
	        sb.append(LINEND);
	        sb.append("Content-Disposition: form-data; name=\"" + entry.getKey() + "\"" + LINEND);
	        sb.append("Content-Type: text/plain; charset=" + CHARSET + LINEND);
	        sb.append("Content-Transfer-Encoding: 8bit" + LINEND);
	        sb.append(LINEND);
	        sb.append(entry.getValue());
	        sb.append(LINEND);
	    }

	    DataOutputStream outStream = new DataOutputStream(conn.getOutputStream());
	    outStream.write(sb.toString().getBytes());

[贪睡的兔子]

	InputStream inputStream=request.getInputStream();
			BufferedReader buf=new BufferedReader(new InputStreamReader(inputStream,"utf-8"));
			String line="";
			while((line=buf.readLine())!=null)
				System.out.println(line);

得到的流能打印

--27693a33-29ab-4045-b3a6-f3b716f28a0d
Content-Disposition: form-data; name="pageNo"
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

1
--27693a33-29ab-4045-b3a6-f3b716f28a0d
Content-Disposition: form-data; name="userId"
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

48
--27693a33-29ab-4045-b3a6-f3b716f28a0d
Content-Disposition: form-data; name="pageSize"
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

10
--27693a33-29ab-4045-b3a6-f3b716f28a0d
Content-Disposition: form-data; name="type"
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

74
--27693a33-29ab-4045-b3a6-f3b716f28a0d
Content-Disposition: form-data; name="friendId"
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

101
--27693a33-29ab-4045-b3a6-f3b716f28a0d--


但直接用request.getParamter("userId") 就得不到参数

[xiaozhou10]

我也想求解 我的是url自动生成的后面加？page=* 然后servlet 都得不到 后来我在页面用个 隐藏的name属性

[有爱的小止]

Servlet要一个HttpServletRequest request的Request对象
然后取网址传过来的参数用request.getParameter("name");