使用HttpURLConnection进行请求各种接口

Posted 2022-10-12 健康平安的活着

一 使用httpUrlconnection进行请求接口

1.1 HttpURLConnection类

在 JDK 的 java.net 包中已经提供了访问 Http 协议的基本功能的类：HttpURLConnection， 可用于向指定网站发送 GET 请求、 Post请求。

这里访问：京东万象 https://wx.jdcloud.com/   其中获取手机归属地的一个app接口

 1.2 代码

1.请求工具类

package com.icoding.utils;

import org.springframework.util.StreamUtils;

import java.net.HttpURLConnection;
import java.net.URL;
import java.nio.charset.Charset;
import java.util.Map;

public class HttpUtil 
    /**
     * 模拟浏览器的请求
     */
    public static String sendHttpRequest(String httpURL,Map<String,String> params) throws Exception
        //建立URL连接对象
        URL url = new URL(httpURL);
        //创建连接
        HttpURLConnection conn = (HttpURLConnection) url.openConnection();
        //设置请求的方式(需要是大写的)
        conn.setRequestMethod("POST");
        //设置需要输出
        conn.setDoOutput(true);
        //判断是否有参数.
        if(params!=null&&params.size()>0)
            StringBuilder sb = new StringBuilder();
            for(Map.Entry<String,String> entry:params.entrySet())
                sb.append("&").append(entry.getKey()).append("=").append(entry.getValue());
            
            //sb.substring(1)去除最前面的&
            conn.getOutputStream().write(sb.substring(1).toString().getBytes("utf-8"));
        
        //发送请求到服务器
        conn.connect();
        //获取远程响应的内容.
        String responseContent = StreamUtils.copyToString(conn.getInputStream(),Charset.forName("utf-8"));
        conn.disconnect();
        return responseContent;
    
    /**
     * 模拟浏览器的请求
     */
    public static void sendHttpRequest(String httpURL,String jesssionId) throws Exception
        //建立URL连接对象
        URL url = new URL(httpURL);
        //创建连接
        HttpURLConnection conn = (HttpURLConnection) url.openConnection();
        //设置请求的方式(需要是大写的)
        conn.setRequestMethod("POST");
        //设置需要输出
        conn.setDoOutput(true);
        conn.addRequestProperty("Cookie","JSESSIONID="+jesssionId);
        //发送请求到服务器
        conn.connect();

        int code = conn.getResponseCode();
        if (code == 200) 
            conn.getInputStream(); // 得到网络返回的正确输入流
         else 
            conn.getErrorStream(); // 得到网络返回的错误输入流
        

        conn.disconnect();
    

2.调试窗口

public class TestHttp 
    public static void main(String[] args) throws Exception 
        //Url:https://way.jd.com/jisuapi/query4?shouji=18813010337&appkey=9f30f357a45e7fa32a9948237271f44a
        Map<String,String> parasMap=new HashMap<String,String>();
        parasMap.put("shouji","18813010337");
        parasMap.put("appkey","9f30f357a45e7fa32a9948237271f44a");
        String url="https://way.jd.com/jisuapi/query4";
        String res=  HttpUtil.sendHttpRequest(url,parasMap);
        System.out.println("res:"+res);
    

结果：

res:"code":"10000","charge":false,"msg":"查询成功","result":"status":0,"msg":"ok","result":"shouji":"18813010337","province":"北京","city":"北京","company":"北京移动全球通卡","areacode":"010","requestId":"7c06a60b82fc417d95bdeee9b9b24e7e"