/**  * 通过HttpClient调用服务  *  * @param url 路径  *      data json数据  * @return  */ //post请求方法 public   String sendItsmTask(String url, String data) throws Exception{
      System.out.println("进入发送itsm方法 url:"+ url + "data:" +data);     String  isSuccess = "success";     HttpPost post = null;     try {
          HttpClient httpClient = new DefaultHttpClient();         // 设置超时时间         httpClient.getParams().setParameter(CoreConnectionPNames.CONNECTION_TIMEOUT, 2000);         httpClient.getParams().setParameter(CoreConnectionPNames.SO_TIMEOUT, 2000);         post = new HttpPost(url);         // 构造消息头         post.setHeader("Content-type", "application/json; charset=utf-8");         post.setHeader("Connection", "Close");         // 构建消息实体         StringEntity entity = new StringEntity(data, Charset.forName("UTF-8"));         entity.setContentEncoding("UTF-8");         // 发送Json格式的数据请求         entity.setContentType("application/json");         post.setEntity(entity);         HttpResponse response = httpClient.execute(post);         // 检验返回码         int statusCode = response.getStatusLine().getStatusCode();         if(statusCode != HttpStatus.SC_OK){
              log.info("请求出错: "+statusCode);             isSuccess = "error";         }else{
              String retCode = "";             // 返回码中包含retCode             // 找响应信息             for(Header header : response.getAllHeaders()){
                  System.out.println("这是个什么神奇的东西"+header.getName() +":" + header.getValue());                 if("retcode".equals(header.getName())){
                      retCode = header.getValue();                 }             }             if(IAS_SUCCESS != retCode ){
                  // 日志打印                 log.info("调用全网接口下发工单 返回状态异常响应码为： "+retCode);                 isSuccess = "error";             }         }     } catch (Exception e) {
          e.printStackTrace();         isSuccess = "error";     }finally{
          if(post != null){
              try {
                  post.releaseConnection();                 Thread.sleep(500);             } catch (InterruptedException e) {
                  e.printStackTrace();             }         }     }     return isSuccess; }