最近遇到一个小问题，是由于不细心造成的。项目配置文件之前是.property,接口也是能调通的，后来改成.yml格式，修改后把mybatis配置在spring下面了，所以一直找不到xml文件报错，网上查了各种方法也不起作用

server:
  port: 8080
spring:
  profiles:
    active: dev
  redis:
    host: localhost
    database: 0
    port: 6379
    password:
    pool:
      max-active: 200
      max-wait: -1
      max-idle: 10
      min-idle: 10
      timeout: 1000

# JWT Object save audience
audience:
    clientId: 098f6bcd4621d373cade4e832627b4f6
    # A key that can be replaced by Base64 encryption
    base64Secret: MDk4ZjZiY2Q0NjIxZDM3M2NhZGU0ZTgzMjYyN2I0ZjY=
    # The issuing subject of the JWT shall be deposited in the issuer
    name: springbootapi
    # Expired 24 hours
    expiresSecond: 86400
pagehelper:
    helperDialect: mysql
    reasonable: true  # To minimize or maximize the number of pages when the input page is negative or larger
    supportMethodsArguments: true
    params: count:countSql
mybatis:
    typeAliasesPackage: com.xj.demo.model
    mapper-locations: classpath:/mapper/*.xml

　正确的方法是把mybatis放在一级目录与spring同级即可

mybatis下的两个元素，缺一不可