Access denied for user ‘‘@‘localhost‘ (using password: NO)

今天连接数据库发现错误

找了好多资料才发现坑
我的数据库配置

spring:
  datasource:
    driver-class-name: com.MysqL.cj.jdbc.Driver
    url: jdbc:MysqL://localhost:3306/demo?useUnicode=true&characterEncoding=utf8&serverTimezone=UTC
    data-username: root
    data-password: 123456

 username与password的前面都加了 data-，这是根据自动补全写的，这样写会就报错：Access denied for user ''@'localhost' (using password: NO)

正确配置如下、
 

spring:
  datasource:
    driver-class-name: com.MysqL.cj.jdbc.Driver
    url: jdbc:MysqL://localhost:3306/demo?useUnicode=true&characterEncoding=utf8&serverTimezone=UTC
    username: root
    password: 123456

完美解决