通过HttpClient调用服务

/**
 * 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;

}