微信请求参数生成SHA1签名

package com.dhht.wechat.util;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;

import java.util.HashMap;
import java.util.Map;
import java.util.SortedMap;
import java.util.TreeMap;

/**
 * @Author: sh
 * @Description: WechatUtil
 * @Date: 17:46 2019/10/15
 */
public class WechatUtil {

    final static String KEY_S = "SIGNKEY-";

    public static String getSignKey(String url){
        return KEY_S+url;
    }

    /**
     * 获取access_token
     *
     * @param appId
     * @param secret
     * @return
     */
    public static String getAccessToken(String appId, String secret) {
        String url = "https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&app));
    }
}