微信小程序获取openid、sessionKey_java 获取微信小程序 sessionkey

按照微信开放文档，服务端拿到小程序发送的code，去微信服务器换取openid

获取accessToken

package com.rain.playcarforwx.common.utils;
 
import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
 
import java.util.HashMap;
import java.util.Map;
 
/**
 * @Description TODO
 * @Author Yu
 * @Date 2022-11-26
 */
 
public class WxUtils {
    public static JSONObject getSessionKeyOrOpenId(String code) {
        String requestUrl = "https://api.weixin.qq.com/sns/jscode2session";
        Map<String, String> requestUrlParam = new HashMap<>();
        
        //小程序appId
        requestUrlParam.put("appid", "APPID");
        //小程序secret
        requestUrlParam.put("secret", "SECRET");
        //小程序端返回的code
        requestUrlParam.put("js_code", code);
        //默认参数
        requestUrlParam.put("grant_type", "authorization_code");
        //发送post请求读取调用微信接口获取openid用户唯一标识
        JSONObject jsonObject = JSON.parseObject(HttpClientUtils.doGet(requestUrl, requestUrlParam));
        return jsonObject;
    }
 
    public static JSONObject getAccessToken(){
        String requestUrl = "https://api.weixin.qq.com/cgi-bin/token";
        Map<String, String> requestUrlParam = new HashMap<>();
        //小程序appId
        requestUrlParam.put("appid", "APPID");
        //小程序secret
        requestUrlParam.put("secret", "SECRET");
        //默认参数
        requestUrlParam.put("grant_type", "client_credential");
        JSONObject jsonObject = JSON.parseObject(HttpClientUtils.doGet(requestUrl, requestUrlParam));
        return jsonObject;
    }
 
}

HttpClientUtils见HttpClientUtils工具类