1、 普通映射
2、 @Select("select * from mybatis_Student where id=#{id}")
3、 public Student getStudent(int id);
4、 @Insert("insert into mybatis_Student (name, age, remark, pic,grade_id,address_id) values (#{name},#{age},#{remark}, #{pic},#{grade.id},#{address.id})")
5、 public int insert(Student student);
6、 @Update("update mybatis_Student set name=#{name},age=#{age} where id=#{id}")
7、 public int update(Student student);
8、 @Delete("delete from mybatis_Student where id=#{id}")
9、 public int delete(int id);
2、结果集映射
@Select("select * from mybatis_Student")
@Results({
@Result(id=true,property="id",column="id"),
@Result(property="name",column="name"),
@Result(property="age",column="age")
})
public List<Student> getAllStudents();
3、关系映射
3.1、一对一
@Select("select * from mybatis_Student")
@Results({
@Result(id=true,property="id",column="id"),
@Result(property="name",column="name"),
@Result(property="age",column="age"),
@Result(property="address",column="address_id",one=@One(select="com.skymr.mybatis.mappers.AddressMapper.getAddress"))
})
public List<Student> getAllStudents();
3.2、一对多
@Select("select * from mybatis_grade where id=#{id}") @Results({ @Result(id=true,column="id",property="id"), @Result(column="grade_name",property="gradeName"), @Result(property="students",column="id",many=@Many(select="com.skymr.mybatis.mappers.Student2Mapper.getStudentsByGradeId")) })
public Grade getGrade(int id);