通用请求DEMO

public static void main(String[] args) throws IOException {
        String encryptionKey="hklcrm140!!";
        String JsnStr = "{\"appId\":\"XXX\"}";
        YsPayDto dto = JSON.parseObject(JsnStr, YsPayDto.class);
        String parmaStr = CryptoUtil.desEncode(encryptionKey, JSON.toJSONString(dto));
        CloseableHttpClient httpClient = HttpClientBuilder.create().build();
        HttpPost httpPost = new HttpPost("XXXURL");
        httpPost.addHeader("Content-type", "text/plain; charset=utf-8");
        httpPost.setEntity(new StringEntity(parmaStr, "UTF-8"));
        CloseableHttpResponse response = httpClient.execute(httpPost);
        String bodyAsString = EntityUtils.toString(response.getEntity());
    }