java 发送get请求 java get请求发送json数据

主函数代码块:

HttpClient httpClient = HttpClientBuilder.create().build();
            // Get请求
            URIBuilder uriBuilder = new URIBuilder(payurl);
            if (StringUtils.isNotEmpty(reqJson)) {
                List<NameValuePair> nameValuePairList = json2NameValuePairList(JSON.parseObject(reqJson));
                uriBuilder.setParameters(nameValuePairList);
            }
            HttpGet httpGet = new HttpGet(uriBuilder.build());
            // 设置Header
            httpGet.setHeader("Content-Type", "application/json");

            HttpResponse httpResponse = httpClient.execute(httpGet);

公共方法块：

private List<NameValuePair> json2NameValuePairList(JSONObject params) {
        if (params != null && !params.isEmpty()) {
            List<NameValuePair> list = new ArrayList<NameValuePair>();
            for (Map.Entry<String, Object> entry : params.entrySet()) {
                if (entry.getValue() != null) {
                    String value = String.valueOf(entry.getValue());
                    list.add(new BasicNameValuePair(entry.getKey(), value));
                }
            }
            return list;
        }
        return null;
    }