此兩段代碼示例只針對發(fā)送參數(shù)是json格式有用，類似{"param1":"xxxx","param2":"xxxx"}
java:

import com.alibaba.fastjson.JSONObject;
import org.apache.http.client.methods.CloseableHttpResponse;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.entity.ContentType;
import org.apache.http.entity.StringEntity;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.util.EntityUtils;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.net.HttpURLConnection;
import java.net.URL;
import java.nio.charset.StandardCharsets;


public class HttpRequest {
    public static String sendPost(String url,String param){
        OutputStreamWriter out =null;
        BufferedReader reader = null;
        StringBuilder response = new StringBuilder();

        //創(chuàng)建連接
        try {
            URL httpUrl = null; //HTTP URL類 用這個類來創(chuàng)建連接
            //創(chuàng)建URL
            httpUrl = new URL(url);
            //建立連接
            HttpURLConnection conn = (HttpURLConnection) httpUrl.openConnection();
            conn.setRequestMethod("POST");
            conn.setRequestProperty("Content-Type", "application/json");
            conn.setRequestProperty("connection", "keep-alive");
            conn.setUseCaches(false);//設置不要緩存
            conn.setInstanceFollowRedirects(true);
            conn.setDoOutput(true);
            conn.setDoInput(true);
            conn.connect();
            //POST請求
            out = new OutputStreamWriter(
                    conn.getOutputStream());
            out.write(param);
            out.flush();
            //讀取響應
            reader = new BufferedReader(new InputStreamReader(
                    conn.getInputStream()));
            String lines;
            while ((lines = reader.readLine()) != null) {
                lines = new String(lines.getBytes(), StandardCharsets.UTF_8);
                response.append(lines);
            }
            reader.close();
            // 斷開連接
            conn.disconnect();

        } catch (Exception e) {
            System.out.println("發(fā)送 POST 請求出現(xiàn)異常！"+e);
            e.printStackTrace();
        }
        //使用finally塊來關閉輸出流、輸入流
        finally{
            try{
                if(out!=null){
                    out.close();
                }
                if(reader!=null){
                    reader.close();
                }
            }
            catch(IOException ex){
                ex.printStackTrace();
            }
        }

        return response.toString();
    }



    public static void main(String[] args) {
        JSONObject jsonParam = new JSONObject();
        jsonParam.put("phoneNo", "18851024375");
        //jsonParam.put("name", "zhangsan");
        String param = jsonParam.toJSONString();

        String url="http://xxxxx/xxxxx/login/code";

        String sendPost = sendPost(url, param);
        System.out.println(sendPost);

    }
}

注：用到的maven配置

       <dependency>
            <groupId>org.apache.httpcomponents</groupId>
            <artifactId>httpclient</artifactId>
            <version>4.5.13</version>
        </dependency>


        <!-- https://mvnrepository.com/artifact/com.alibaba/fastjson -->
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>fastjson</artifactId>
            <version>1.2.68</version>
        </dependency>

python：

class Login(object):
    # 發(fā)送短信驗證碼
    def sendSmsCode(self, phone):
        url_sendSmsCode = 'http://xxxxx/xxxxx/login/code'
        headers_sendSmsCode = {"token": "",
                               "deviceType": "2",
                               "deviceID": "00000000-100e-9f06-100e-9f0600000000",
                               "version": "1.0.1",
                               "skipVersion": "0",
                               "Content-Type": "application/json;charset=utf-8",
                               "Content-Length": "25",
                               "Connection": "Keep-Alive",
                               "Accept-Encoding": "gzip",
                               "User-Agent": "okhttp/3.10.0"}
        data_sendSmsCode = {"phoneNo": "{}".format(phone)}
        try:
            r = requests.post(url=url_sendSmsCode, headers=headers_sendSmsCode, json=data_sendSmsCode, verify=False)
            # logging.debug(r.json())
            if r.json()['code'] == 0 and r.json()['msg'] == "執(zhí)行成功":
                logging.debug("發(fā)送短信驗證碼成功，后續(xù)執(zhí)行截取短信驗證碼操作")
                return "success"
            elif r.json()['code'] == 400:
                logging.debug("code返回400，檢查服務器...")
            elif r.json()['code'] == 10003:
                logging.debug("請求失敗，請60秒后重試")
            else:
                raise ValueError("超出預期異常，直接退出")
        except Exception as e:
            pass