Java发送HTTP的get，post请求(JSON)

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/**
 * Created by  on 2017/5/15.
 */
public class HttpUtil {
    /**
     * json 字符串
     * @param url
     * @param param
     * @return
     */
    public static String getSerchPersion(String url,String param){
      /* 1 生成 HttpClinet 对象并设置参数 */
        HttpClient httpClient = new HttpClient();
        // 设置 Http 连接超时为5秒
        ().getParams().setConnectionTimeout(5000);
      /* 2 生成 GetMethod 对象并设置参数 */
        GetMethod getMethod = new GetMethod(url);
        // 设置 get 请求超时为 5 秒
        ().setParameter(HttpMethodParams.SO_TIMEOUT, 5000);
        // 设置请求重试处理，用的是默认的重试处理：请求三次
        ().setParameter(HttpMethodParams.RETRY_HANDLER, new DefaultHttpMethodRetryHandler());
        String response = "";
      /* 3 执行 HTTP GET 请求 */
        try {
            int statusCode = (getMethod);
         /* 4 判断访问的状态码 */
            if (statusCode != HttpStatus.SC_OK) {
                ("请求出错: "+ ());
            }
         /* 5 处理 HTTP 响应内容 */
            // HTTP响应头部信息，这里简单打印
            Header[] headers = ();
            for (Header h : headers)
                (() + "------------ " + ());
            // 读取 HTTP 响应内容，这里简单打印网页内容
            byte[] responseBody = ();// 读取为字节数组
            response = new String(responseBody, param);
            ("----------response:" + response);
            // 读取为 InputStream，在网页内容数据量大时候推荐使用
            // InputStream response = ();
        } catch (HttpException e) {
            // 发生致命的异常，可能是协议不对或者返回的内容有问题
            ("请检查输入的URL!");
            ();
        } catch (IOException e) {
            // 发生网络异常
            ("发生网络异常!");
            ();
        } finally {
         /* 6 .释放连接 */
            ();
        }
        return response;
    }
    /**
     * post请求
     * @param url
     * @param json
     * @return
     */
    public static JSONObject doPost(String url,JSONObject json){
        DefaultHttpClient client = new DefaultHttpClient();
        HttpPost post = new HttpPost(url);
        JSONObject response = null;
        try {
            StringEntity s = new StringEntity(());
            ("UTF-8");
            ("application/json");//发送json数据需要设置contentType
            (s);
            HttpResponse res = (post);
            if(().getStatusCode() == HttpStatus.SC_OK){
                HttpEntity entity = ();
                String result = (());// 返回json格式：
                response = (result);
            }
        } catch (Exception e) {
            throw new RuntimeException(e);
        }
        return response;
    }

//调用
public static void main(String arg[]) throws Exception {
        String url = "http://localhost:8080/";
        JSONObject params = new JSONObject();
        ("personName", "name");
        ("personCode", "230882xxxxxx2116");
        JSONObject param2 = new JSONObject();
        ("pageNo", 1);
        ("pageSize", 20);
        ("page", param2);
        String param = "q="+();
        //get 请求
        String ret = getSerchPersion(url, ());
        (ret);
//        JSONObject jsonResponse=(param);
//        JSONObject json = (JSONObject)("page");
//        (("pageSize"));

        //post 请求
        JSONObject jsonObject = doPost(url,params);
        (());
    }