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项目存放accessToken 皆是一redis存储

1. 获得Access Token

并且获取jsapi_ticket 

accessToken 存在有效期 所以，用定时任务 定时刷新

WeChatServiceImpl

一下几个方法来处理：

/**
 * 刷新AccessToken
 * 仅在 接口返回token失效时
 * @return
 */
@Override
public boolean flushWeChatAccessToken() throws Exception{
    // 获取AccessToken
    String requestUrl = "https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid=%s&secret=%s";
    String appid = PropertiesReader.readString("weChat","server_appId");
    String secret = PropertiesReader.readString("weChat","server_appSecret");
    requestUrl = String.format(requestUrl, appid, secret);
    JSONObject accessTokenObject = HttpClientUtil.getToHttps(requestUrl);
    String accessToken = accessTokenObject.getString("access_token");
    int expireTime = accessTokenObject.getInteger("expires_in");
    setAccessToken(Const.WEIXINACCESSTOKEN,accessToken,expireTime);
    // 获取jsticket
    String jsticketRequestUrl = "https://api.weixin.qq.com/cgi-bin/ticket/getticket?access_token=%s&type=jsapi";
    jsticketRequestUrl = String.format(jsticketRequestUrl, accessToken);
    JSONObject jsticketObject = HttpClientUtil.getToHttps(jsticketRequestUrl);
    String ticket = jsticketObject.getString("ticket");
    int ticketExpireTime = jsticketObject.getInteger("expires_in");
    String  result = setAccessToken(Const.JSACCESSTOKEN,ticket,ticketExpireTime);
    return true;
}

/**
 * 通过Redis 获取AccessToken
 * @return
 * @throws IOException
 */
public String getAccessToken(String key) throws IOException{
    JedisCluster jedisCluster = redisClusterFactory.getJedisCluster();
    String reaultStr = "";
    boolean result = jedisCluster.exists(key);
    if (result) {
        reaultStr = jedisCluster.get(key);
    }
    return reaultStr;
}

/**
 * 通过Redis 获取AccessToken
 * @return
 * @throws IOException
 */
public String setAccessToken(String key, String val ,int millions) throws IOException{
    JedisCluster jedisCluster = redisClusterFactory.getJedisCluster();
    String reaultStr = jedisCluster.setex(key, millions , val);
    return reaultStr;
}

2验证签名

package com.yxb.utils.encrypt;

import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;

/**
 * @Description: 用于微信签名
 * @date 2016/12/9 12:53
 */
public class WeChatSHA {

    /**
     * 微信SHA1签名
     * @return
     */
    public static String Sign(String ticket, String noncestr, String timestamp, String url) {
        String canSign = "jsapi_ticket=%s&noncestr=%s&timestamp=%s&url=%s";
        canSign = String.format(canSign, ticket, noncestr, timestamp, url);
        try {
            MessageDigest digest = MessageDigest.getInstance("SHA-1"); //如果是SHA加密只需要将"SHA-1"改成"SHA"即可
            digest.update(canSign.getBytes());
            byte messageDigest[] = digest.digest();
            // Create Hex String
            StringBuffer hexStr = new StringBuffer();
            // 字节数组转换为 十六进制 数
            for (int i = 0; i < messageDigest.length; i++) {
                String shaHex = Integer.toHexString(messageDigest[i] & 0xFF);
                if (shaHex.length() < 2) {
                    hexStr.append(0);
                }
                hexStr.append(shaHex);
            }
            return hexStr.toString();

        } catch (NoSuchAlgorithmException e) {
            e.printStackTrace();
        }
        return null;
    }


    public static void main(String[] args) {
        System.out.println(WeChatSHA.Sign("123","122","221","222"));
    }
}

3，返回签名的接口

/**
 * 微信分享接口
 * @return
 */
@PostMapping("/wechat/weixinshare")
@ResponseBody
public ResponseModel<Map<String,Object>> weChatShare(String url){
    Map<String,Object> result = new HashedMap();
    try{
        String noncestr = UUID.randomUUID().toString();
        String timestamp = new Date().getTime()+"";

        result.put("appId", PropertiesReader.readString("weChat","server_appId"));
        result.put("timestamp", timestamp);
        result.put("nonceStr", noncestr);
        String ticket = weChatService.getAccessToken(Const.JSACCESSTOKEN) ;
        result.put("signature", WeChatSHA.Sign(ticket, noncestr, timestamp,url));
        return new ResponseModel(ErrorEnum.SUCCESS.getResCode() , ErrorEnum.SUCCESS.getMsg(), result);
    } catch ( Exception e ){
        e.printStackTrace();
    }
    return new ResponseModel(ErrorEnum.WECHAT_SHAREFAIL.getResCode() , ErrorEnum.WECHAT_SHAREFAIL.getMsg(), result);
}

4，页面ajax 加载

$(function(){
    // 拉取分享接口
    $.ajax({
        url:"/wechat/wechat/weixinshare",
        type:"POST",
        async:"false",
        dataType: "json",
        data: {
            url:window.location.href
        },
        success:function(data){
            console.log(data)
            if(data.resCode == '00000'){//已经登录
                wx.config({
                    debug: false,
                    appId: data.data.appId, // 必填，公众号的唯一标识
                    timestamp: data.data.timestamp, // 必填，生成签名的时间戳
                    nonceStr: data.data.nonceStr, // 必填，生成签名的随机串
                    signature: data.data.signature,// 必填，签名，见附录1
                    jsApiList: ['onMenuShareTimeline','onMenuShareAppMessage'] // 必填，需要使用的JS接口列表，所有JS接口列表见附录2
                });
            }
        },
        error:function(){
        }
    });
});

5，通过ready接口处理成功验证

wx.ready(function(){
    wx.onMenuShareTimeline({
        title: '邀请好友双重礼 钟情可“荐”', // 分享标题
        link: hosts+'/weixin/detail/publicChannel.html?sharecode='+shareCode, // 分享链接
        imgUrl: 'http://'+hosts+'/weixin/detail/img/invite_march_icon.jpg', // 分享图标
        success: function () {
            window.location.href = "/weixin/detail/inviteFriends.html?back=1";//分享成功页面
        },
        cancel: function () {
            // 用户取消分享后执行的回调函数
        }
    });

    wx.onMenuShareAppMessage({
        title: '邀请好友双重礼 钟情可“荐”',
        desc: '邀请好友平分现金，好友出借持续返现，快来参见吧!', // 分享描述
        link: hosts+'/weixin/detail/publicChannel.html?sharecode='+shareCode, // 分享链接
        imgUrl: 'http://'+hosts+'/weixin/detail/img/invite_march_icon.jpg', // 分享图标
        type: 'link', // 分享类型,music、video或link，不填默认为link
        dataUrl: '', // 如果type是music或video，则要提供数据链接，默认为空
        success: function () {
            window.location.href = "/weixin/detail/inviteFriends.html?back=1"
        },
        cancel: function () {
            // 用户取消分享后执行的回调函数
        }
    });
});