修改yml文件：
mybatis:
mapper-locations: classpath*:mapper/*.xml
type-aliases-package: com.example.emos.wx.db.pojo
configuration:
log-impl: org.apache.ibatis.logging.stdout.StdOutImpl
map-underscore-to-camel-case: true
logging:
level:
root: info
com.example.emos.wx.db.dao : warn
pattern:
console: "%d{HH:mm:ss} %-5level %msg%n"