springboot mybatis

一。使用注解

实体类：目前测试，需要使用Jpa的entity和主键@Id

dao:

@Mapper
public interface UserDao {
    @Select("select * from user where name=#{name} and user_pass=#{user_pass}")
    User findByData(String name,String user_pass);
}
1.可以使用 @Mapper
2.也可以在入口类加@MapperScan("com.example.demo1.mybatisdao") 加上@Repository

serviece:

正常写

二。xml,不需要Jpa

yml 配置：
mybatis:
  mapper-locations: classpath:/mappers/*Mapper.xml
#  type-aliases-package: com.example.demo1.mybatisdao

xml配置：

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE mapper
        PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
        "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="com.example.demo1.mybatisdao.UserDao">

    <select id="findByData"
            resultType="com.example.demo1.entity.User"
            parameterType="String">

        select * from user u
        <where>
            u.name = #{name}
            and u.user_pass = #{user_pass}
        </where>
    </select>
</mapper>

实体类：不需要@Entity @Id
dao:

@Mapper
public interface UserDao {

   User findByData(String name,String user_pass);
}