MyBatis的动态SQL操作--删除

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" 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删除选中的条目，具体选中哪些是不确定的

根据选择条目的不同生成不同的sql语句来删除不同的条目.

delete from student where id in (1, 3, 5)

<?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">

<!--
    namespace的取值可以是实体的全限定名，这样有好处！
 -->
<mapper namespace="com.winner.entity.Student">
    <resultMap id="studentMap" type="Student">
        <id property="id" column="id"/>
        <result property="name" column="name"/>
        <result property="sal" column="sal"/>
    </resultMap>
    <delete id="dynaDeleteArray">
        delete from student where id in
        <!-- foreach用于迭代数组元素
             open表示开始符号
             close表示结束符合
             separator表示元素间的分隔符
             item表示迭代的数组，属性值可以任意，但提倡与方法的数组名相同
             #{ids}表示数组中的每个元素值
         -->
        <foreach collection="array" open="(" close=")" separator="," item="ids">
            #{ids}
        </foreach>
    </delete>

    <delete id="dynaDeleteList">
        delete from student where id in
        <foreach collection="list" open="(" close=")" separator="," item="ids">
            #{ids}
        </foreach>
    </delete>
</mapper>

public class StudentDao {
    /**
     * 根据ID批量删除(数组)
     */
    public void dynaDeleteArray(int... ids) throws Exception{
        SqlSession sqlSession = null;
        try{
            sqlSession = MybatisUtil.getSqlSession();
            sqlSession.delete(Student.class.getName() + ".dynaDeleteArray", ids);
            sqlSession.commit();
        }catch(Exception e){
            e.printStackTrace();
            sqlSession.rollback();
            throw e;
        }finally{
            MybatisUtil.closeSqlSession();
        }
    }

    /**
     * 根据ID批量删除(集合)
     */
    public void dynaDeleteList(List<Integer> ids) throws Exception{
        SqlSession sqlSession = null;
        try{
            sqlSession = MybatisUtil.getSqlSession();
            sqlSession.delete(Student.class.getName() + ".dynaDeleteList", ids);
            sqlSession.commit();
        }catch(Exception e){
            e.printStackTrace();
            sqlSession.rollback();
            throw e;
        }finally{
            MybatisUtil.closeSqlSession();
        }
    }

    public static void main(String[] args) throws Exception{
        StudentDao dao = new StudentDao();
        //dao.dynaDeleteArray(new int[]{1,3,5,7,77});
        //dao.dynaDeleteArray(1,3,5,7,77);
        //dao.dynaDeleteArray(2,4,444);

        List<Integer> ids = new ArrayList<Integer>();
        ids.add(6);
        ids.add(8);
        ids.add(9);
        dao.dynaDeleteList(ids);
    }
}