game/src/main/java/com/hhsx/minigame/utils/AccessToken.java

package com.hhsx.minigame.utils;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import com.hhsx.minigame.constant.Constant;
import org.apache.commons.lang3.StringEscapeUtils;

import java.io.IOException;
import java.security.KeyManagementException;
import java.security.NoSuchAlgorithmException;
import java.security.NoSuchProviderException;
import java.util.Date;

/**
 * Author: 吴涛涛 cuiyi@itany.com
 * Date : 2019 - 09 - 17 10:04
 * Description:<描述>
 * Version: 1.0
 */
public class AccessToken {

    private static String wechatAppId = Constant.WECHAT_APPID;

    private static String wechatSecret = Constant.WECHAT_APPSECRET;

    private static String oldAccessToken = null;

    private static Date time = new Date();//oldAccessToken值创建时间

    private static Long expiresIn = 7200L*1000;//accessToken值有效时长 单位毫秒

    public static String getNewAccessToken() throws Exception {
        if(oldAccessToken == null || (oldAccessToken != null && System.currentTimeMillis() > time.getTime()+expiresIn)){
            String url = "https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid=" + wechatAppId + "&secret=" + wechatSecret;
            String resp = HttpKit.get(url, true);
            resp = StringEscapeUtils.unescapeJava(resp);
            JSONObject json = (JSONObject) JSON.parse(resp);
            //获取值赋值给全局变量
            if (!json.containsKey("errcode")) {
                String newAccessToken = json.getString("access_token");
                String newExpiresIn = json.getString("expires_in");
                oldAccessToken = newAccessToken;
                expiresIn = Long.parseLong(newExpiresIn) * 1000;
                time = new Date();
                System.out.println("获取新access_token==>" + oldAccessToken);
            }
        }
        return oldAccessToken;
    }
}