access denied for user ‘17738‘@‘localhost‘ (using password: YES)异常

在整合Spring 和mybatis 时，配置数据源时

properties属性文件上要加前缀，避免直接读取系统属性，否则会出：

access denied for user '17738'@'localhost' (using password: YES)异常

jdbc.driverClassName=com.mysql.cj.jdbc.Driver
jdbc.url=jdbc:mysql://localhost:3306/ssm?serverTimezone=UTC&characterEncoding=utf-8&Unicode=true&useSSL=false
jdbc.username=root
jdbc.password=1208
jdbc.initialSize=5
jdbc.maxActive=10
jdbc.maxWait=3000