用httpPost对JSON发送和接收

HTTPPost发送JSON：

 private static final String APPLICATION_JSON = "application/json";

     private static final String CONTENT_TYPE_TEXT_JSON = "text/json";

 public static void httpPostWithJSON(String url, String json) throws Exception {
         // 将JSON进行UTF-8编码,以便传输中文
         String encoderJson = URLEncoder.encode(json, HTTP.UTF_8);

         DefaultHttpClient httpClient = new DefaultHttpClient();
         HttpPost httpPost = new HttpPost(url);
         httpPost.addHeader(HTTP.CONTENT_TYPE, APPLICATION_JSON);

         StringEntity se = new StringEntity(encoderJson);
         se.setContentType(CONTENT_TYPE_TEXT_JSON);
         se.setContentEncoding(new BasicHeader(HTTP.CONTENT_TYPE, APPLICATION_JSON));
         httpPost.setEntity(se);
         httpClient.execute(httpPost);
     }

接收HTTPPost中的JSON:

 public static String receivePost(HttpServletRequest request) throws IOException, UnsupportedEncodingException {

         // 读取请求内容
         BufferedReader br = new BufferedReader(new InputStreamReader(request.getInputStream()));
         String line = null;
         StringBuilder sb = new StringBuilder();
         while((line = br.readLine())!=null){
             sb.append(line);
         }

         // 将资料解码
         String reqBody = sb.toString();
         return URLDecoder.decode(reqBody, HTTP.UTF_8);
     }