http请求中的header和body应用

/**
	 * 获取httpBody中的请求数据处理后并以JSON格式返回到httpBody中 测试@ReponseBody（有） @RequestBody（有）
	 * 
	 * @param userLoginMap
	 * @param request
	 * @return
	 * @throws IOException
	 */
	@RequestMapping(value = "/user/login1.json", method = RequestMethod.POST, headers = { "content-type=application/json" })
	public @ResponseBody
	String login(@RequestBody Map<String, String> userLoginMap,
			HttpServletRequest request) throws IOException {
		if (userLoginMap.get("account") == null
				|| userLoginMap.get("password") == null) {
			return "{\"code\":-400,\"message\":\"参数错误。\"}";
		}
		JSONObject jo = new JSONObject();
		try {
			jo.put("code", "1").put("message", "登录成功！");
		} catch (JSONException e) {
			e.printStackTrace();
		}
		return jo.toString();
	}

	/**
	 * 获取httpBody中的请求数据处理后并以JSON格式返回到httpBody中 测试@ReponseBody（无） @RequestBody（无）
	 * 
	 * @param userLoginMap
	 * @param request
	 * @return
	 * @throws IOException
	 */
	@RequestMapping(value = "/user/login2.json", method = RequestMethod.POST, headers = { "content-type=application/json" })
	public void login(HttpServletRequest request, HttpServletResponse response)
			throws IOException {
		/**
		 * 获取request body中的信息，用来代替spring中@RequestBody
		 */
		System.out.println(UserInfoTestController.getBodyString(request
				.getReader()));
		/**
		 * 获取request header中的信息
		 */
		UserInfoTestController.getHeaderString(request);
		JSONObject jo = new JSONObject();
		try {
			jo.put("code", "1").put("message", "登录成功！");
		} catch (JSONException e) {
			e.printStackTrace();
		}
		/**
		 * 返回头信息到body中，用来代替@ResponseBody
		 */
		response.setContentType("application/json; charset=UTF-8");
		response.getWriter().print(jo.toString());
	}

	/**
	 * 获取http请求中body部分的信息,用来代替spring中@RequestBody
	 * 
	 * @param br
	 * @return
	 */
	public static String getBodyString(BufferedReader br) {
		String inputLine;
		String str = "";
		try {
			while ((inputLine = br.readLine()) != null) {
				str += inputLine;
			}
			br.close();
		} catch (IOException e) {
			System.out.println("IOException: " + e);
		}
		return str;
	}

	/**
	 * 获取http请求中header中的参数
	 * 
	 * @param request
	 */
	public static void getHeaderString(HttpServletRequest request) {
		Enumeration<String> enu = request.getHeaderNames();
		while (enu.hasMoreElements()) {// 以此取出头信息
			String headerName = (String) enu.nextElement();
			String headerValue = request.getHeader(headerName);// 取出头信息内容
			System.out.println(headerName + ":" + headerValue);
		}
	}

 模拟http请求：

HttpClient httpClient = new HttpClient();
		StringRequestEntity requestEntity = new StringRequestEntity(
				"{\"account\":\"zzstxx\",\"password\":\"123456\",\"clientType\":\"3\"}",
				"application/json", "UTF-8");
		PostMethod postMethod = new PostMethod(
				"http://127.0.0.1:81/user/login2.json");
		postMethod.setRequestEntity(requestEntity);
		System.out.println(postMethod.getURI());
		int statusCode = httpClient.executeMethod(postMethod);
		System.out.println("JSON:" + postMethod.getResponseBodyAsString());
		System.out.println("获取的最终状态为：" + statusCode);

DefaultHttpClient httpClient = new DefaultHttpClient();
        String url = "http://127.0.0.1:81/user/login2.json";
        HttpPost httpPost = new HttpPost(url);
        // 设置请求的header参数
        httpPost.addHeader("AppKey", "94kid09c9ig9k1loimjg012345123456");
        httpPost.addHeader("Content-Type", "application/json;charset=utf-8");
        // 设置请求的body参数
        List<NameValuePair> nvps = new ArrayList<NameValuePair>();
        nvps.add(new BasicNameValuePair("accid", "helloworld"));
        httpPost.setEntity(new UrlEncodedFormEntity(nvps, "utf-8"));
        // 执行请求
        HttpResponse response = httpClient.execute(httpPost);
        // 打印执行结果
        System.out.println(EntityUtils.toString(response.getEntity(), "utf-8"));