mybatis实现批量更新全过程

   <update id="pubAndTakes">
        <foreach collection="idList" item="item" separator=";" open="begin" close=";end;">
            UPDATE LY_SJS_WDZM_YXLXD_PZRY SET ZT = '1' , CJSJ = TO_CHAR(SYSDATE,'yyyy-MM-dd hh:mm:ss')
            ,BBH = #{item.bbh}
            WHERE ZT = #{item.zt} AND ID = #{item.id}
        </foreach>
    </update>

<update id="updateBatch" parameterType="java.util.List">
    UPDATE your_table
    SET your_column1 = 
        <foreach collection="list" item="item" separator=",">
            WHEN your_id = #{item.id} THEN #{item.column1}
        </foreach>
    WHERE your_id IN
        <foreach collection="list" item="item" open="(" close=")" separator=",">
            #{item.id}
        </foreach>
</update>

<update id="updateBatch" parameterType="java.util.List">
    UPDATE your_table
    SET your_column1 = 
        CASE
            <foreach collection="list" item="item" separator=" ">
                WHEN your_id = #{item.id} THEN #{item.column1}
            </foreach>
        END,
    your_column2 =
        CASE
            <foreach collection="list" item="item" separator=" ">
                WHEN your_id = #{item.id} THEN #{item.column2}
            </foreach>
        END
    WHERE your_id IN
        <foreach collection="list" item="item" open="(" close=")" separator=",">
            #{item.id}
        </foreach>
</update>

SqlSession sqlSession = sqlSessionFactory
                           .openSession(ExecutorType.BATCH, false);

YourMapper mapper = sqlSession.getMapper(YourMapper.class);
try {
    for (YourEntity entity : entities) {
        mapper.update(entity);
    }
    sqlSession.commit();
} finally {
    sqlSession.close();
}