在Ibatis中实现一对多关系,可以通过以下步骤实现:
SELECT * FROM student WHERE id = #id#
SELECT * FROM score WHERE student_id = #id#
<result property="id" column="id"/>
<result property="name" column="name"/>
<collection property="scores" ofType="Score">
<result property="id" column="id"/>
<result property="studentId" column="student_id"/>
<result property="score" column="score"/>
</collection>
</parameterMap>
SqlSession sqlSession = sqlSessionFactory.openSession();
Student student = sqlSession.selectOne("com.example.StudentMapper.getStudentWithScores", 1);
sqlSession.close();
通过以上步骤,我们可以在Ibatis中实现一对多关系。
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