获取accessToken

你的名字 2024-02-20 12:37 43阅读 0赞

## 获取accessToken ##

> 使用场景： 微信公众号开发和银联二维码支付时需要获取accessToken认证

import org.apache.commons.codec.digest.DigestUtils;
    import javax.servlet.http.HttpServletRequest;
    import java.util.TreeMap;
    import java.util.concurrent.TimeUnit;
     
    
    	@Override
        public AjaxResult pcScanCodePayToken(String orderNo) {
        
            //从无状态原则考虑，此处将accessToken放到redis中比放到本地要好，，，
            String key = CacheConstants.PC_PAY_ACCESS_TOKEN + "accessToken";
            String accessToken = redisCache.getCacheObject(key);
            if(StringUtils.isNotEmpty(accessToken)){
        
                return AjaxResult.success(accessToken);
            }
    
            TreeMap<String, Object> req = new TreeMap<>();
            req.put("appId", appId);
            String timestamp = DateUtils.dateTimeNow("yyyyMMddHHmmss");
            req.put("timestamp", timestamp);
            String nonce = RandomUtils.createRandomCharData(12);
            req.put("nonce", nonce);
            req.put("signMethod", "SHA256");
            String signature = DigestUtils.sha256Hex(appId + timestamp + nonce + AppKey);
            req.put("signature", signature);
            String s = HttpUtil.post(accessTokenUrl, req);
    
            logger.info("调用认证token接口结果：{}", s);
            JSONObject jj = JSONObject.parse(s);
            //接口调用成功
            if ("0000".equals(jj.getString("errCode"))) {
        
                String newAccessToken = jj.getString("accessToken");
                Integer expireIn = jj.getInteger("expiresIn");
                redisCache.setCacheObject(key, newAccessToken, expireIn, TimeUnit.SECONDS);
                return AjaxResult.success(accessToken);
            }else{
        
                return AjaxResult.error("获取accessToken失败，错误码："+jj.getString("errCode")+",错误信息："+jj.getString("errInfo"));
            }
        }