Java uses Http to implement post

public static String send(String url, JSONObject json, String encoding) throws ParseException, IOException {
    
    
        String body = "";

        //创建httpclient对象
        CloseableHttpClient client = HttpClients.createDefault();
        //创建post方式请求对象
        HttpPost httpPost = new HttpPost(url);

        //装填参数
        StringEntity s = new StringEntity(json.toString(), "utf-8");
        System.out.println(json.toString());
        s.setContentEncoding(new BasicHeader(HTTP.CONTENT_TYPE,
                "application/json"));
        //设置参数到请求对象中
        httpPost.setEntity(s);
        System.out.println("请求地址："+url);
//        System.out.println("请求参数："+nvps.toString());

        //设置header信息
        //指定报文头【Content-type】、【User-Agent】
//        httpPost.setHeader("Content-type", "application/x-www-form-urlencoded");
        httpPost.setHeader("Content-type", "application/json");
        httpPost.setHeader("User-Agent", "Mozilla/4.0 (compatible; MSIE 5.0; Windows NT; DigExt)");

        //执行请求操作，并拿到结果（同步阻塞）
        CloseableHttpResponse response = client.execute(httpPost);
        //获取结果实体
        HttpEntity entity = response.getEntity();
        if (entity != null) {
    
    
            //按指定编码转换结果实体为String类型
            body = EntityUtils.toString(entity, encoding);
        }
        EntityUtils.consume(entity);
        //释放链接
        response.close();
        return body;
    }

url is the request address, json is the JSONObject of the object to be uploaded, encoding is the encoding method, generally "utf-8". This function returns the request result as a string.

The calling code example is as follows:

String url = "http://localhost:8079/YiDongBusiness/sendVerificationCode";
JSONObject json = (JSONObject) JSONObject.toJSON(shortMessage);
String encoding = "utf-8";
System.out.println(ShortMessageServiceImpl.send(url, json, encoding));