Merge branch 'dev' into 'mp-server-test'

余额不足返回false

See merge request quanshu/mp-server!277

mp-service/src/main/java/com/qs/mp/user/service/impl/UserExchangeOrderServiceImpl.java

@@ -72,7 +72,7 @@ public class UserExchangeOrderServiceImpl extends ServiceImpl<UserExchangeOrderM
     }
     // 盲豆余额校验
     UserCoin userCoin = userCoinService.getById(userId);
-    if (null == userCoin.getCoin() || userCoin.getCoin() < orderAmt) {
+    if (null == userCoin || null == userCoin.getCoin() || userCoin.getCoin() < orderAmt) {
       return false;
     }