java后端轮询 java后端调用接口

后台调用后台接口并获取返回值：

//-----开始------------
			DefaultHttpClient httpClient = new DefaultHttpClient();
			String url="http://192.xxx.x.xxx:xxxx/xx/xx";
			HttpPost httpPost = new HttpPost(url);
			httpPost.addHeader("Content-Type", "application/x-www-form-urlencoded;charset=utf-8");
			List<NameValuePair> nvps = new ArrayList<NameValuePair>();
　　　　　　　　　　　　　　// ----传参----
			nvps.add(new BasicNameValuePair("VId",“xxx”));
			nvps.add(new BasicNameValuePair("password",“xxx”));
			nvps.add(new BasicNameValuePair("telephone", “xxx”));
			nvps.add(new BasicNameValuePair("nickName",“xxx”));
			try {
				httpPost.setEntity(new UrlEncodedFormEntity(nvps, "utf-8"));
			} catch (UnsupportedEncodingException e) {
				
				e.printStackTrace();
			}
			System.out.println("0000");
			
			// 执行请求
			HttpResponse response = null;
			try {
				response = httpClient.execute(httpPost);
			} catch (IOException e) {
				System.out.println("0002");
				e.printStackTrace();
			}
			System.out.println("0003");
			BufferedReader in = null;
			String content = null;
			try {
				System.out.println("0004");
				in = new BufferedReader(new InputStreamReader(response.getEntity().getContent()));
				StringBuffer sb = new StringBuffer("");
				String line = "";
				String NL = System.getProperty("line.separator");
				while ((line = in.readLine()) != null) {
					sb.append(line + NL);
				}
				content = sb.toString();
				
			} catch (UnsupportedOperationException | IOException e) {
				
				e.printStackTrace();
			} finally {
				try {
					if(in != null) {
						in.close();
					}
				} catch (IOException e) {
					
					e.printStackTrace();
				}
			}
　　　　　　　　　　　　　　// 打印返回值
			System.out.println(content);
			//------结束--------