复杂对象在mapper中的使用

项目场景:

在mapper中遍历复杂对象 如
    private List<Map<String,Object>> time;
    //此对象是list和map的组合,
    //存储数据的格式 "time":[{"year":2021,"quarter":[0,3]},{"year":2022,"quarter":[0,3]}],    

解决方案:

            <if test="target.time != null and target.time.size()>0">
            and
                <foreach collection="target.time" item="item" open="(" separator="or" close=")">
                    <foreach collection="item.entrySet()" index="key" item="value" open="(" close=")">
                        <if test="key == 'year'">
                            year = #{value}
                        </if>
                        <if test="key == 'quarter'">
                            and quarter in
                            <foreach collection="value" item="quarter" open="(" separator="," close=")">
                                #{quarter}
                            </foreach>
                        </if>
                    </foreach>
                </foreach>
            </if>

展现的结果

AND ((year = 2021 AND quarter IN (0, 3)) OR (year = 2022 AND quarter IN (0, 3)))

版权声明:本文为qq_29373343原创文章,遵循CC 4.0 BY-SA版权协议,转载请附上原文出处链接和本声明。