由於工作需要使用java實現http客戶端傳送get請求，且引數值為json格式，幾經周折得以實現，現在記錄分享如下：

hashMap 引數例項：

	     Map<String, Object> indata = new HashMap();
            indata.put("berthstatus", 1);
            indata.put("berthcode", "22333");
            indata.put("parkcode", "6688");
            Map<String, Object> param = new HashMap();
            param.put("indata",indata);
 

    protected void requestService(Map<String,Object> reqmap) throws Exception {

        JSONObject obj = new JSONObject(reqmap);
        String r = URLEncoder.encode(obj.toString(), "UTF-8");
        String reqUrl = "http://192.168.17.35:8888/getParkInfo?jsonString=" + r;
        System.out.println("請求引數:" + reqUrl);
        CloseableHttpResponse response = null;
        CloseableHttpClient client = null;
        String res = null;
        HttpGet httpGet = new HttpGet(reqUrl);
        System.out.println("executing request" + httpGet.getRequestLine());
        try {
            client = HttpClients.createDefault();
            response = client.execute(httpGet);

            if (response.getStatusLine().getStatusCode() == 200) {

                String result = EntityUtils.toString(response.getEntity());

                System.out.println("executing result---連線正常" + result);
            } else {
                System.out.println("executing result---伺服器連線異常");
            }


        } catch (Exception e) {
            System.out.println("Exception================" + e.toString());
        } finally {
            if (response != null) {
                response.close();
            }
            if (client != null) {
                client.close();
            }
        }

    }