Maven使用注解联合查询

Maven使用注解联合查询

一、Maven无条件联合查询

public interface DeptMapper {

@Select("select * from dept where deptno=#{deptno}")

Dept dept(int deptno);

@Select("SELECT * FROM emp")

@Results({

@Result(property = "dept",

column = "deptno",

one = @One(select = "com.java.mapper.DeptMapper.dept"))

})

List<Emp> allemp();

}

二、Maven有条件联合查询

public interface DeptMapper {

@Select("select * from dept where deptno=#{deptno}")

Dept dept(int deptno);

@Select("SELECT * FROM emp where deptno=#{deptno} ")

@Results({

@Result(property = "dept",

column = "deptno",

one = @One(select = "com.java.mapper.DeptMapper.dept"))

})

List<Emp> empByDeptno(@Param("deptno") intdeptno);

}