后台的东西

dto的Rsp的导出时，数据库存储不同状态，1为好，2为坏，3为不好，等等

public String getStatusDesc() {
    if (status != null) {
        switch (status) {
            case 0:
                return "好";
            case 1:
                return "坏";
            case 2:
                return "不好";
        }
    }
    return "";
}

导出时时间的转换注解

@Excel(name = "时间", orderNum = "0", isImportField = "true", exportFormat = "yyyy-MM-dd HH:mm:ss", importFormat = "yyyy-MM-dd HH:mm:ss", databaseFormat = "yyyy-MM-dd HH:mm:ss")

强大的mapping搜索方法

<mapper namespace="com.chongxuan.web.common.dao.xxMapper">


    <select id="findList" resultType="com.chongxuan.web.common.dto.vo.xx.Rspxx">
        select *
        from table_name
        <where>
            <if test="req.user_name != null and req.user_name != ''">
                and user_name = #{req.user_name} or user_id = #{req.user_name}
            </if>
            <if test="req.startTime != null and req.startTime !=''">
                and DATE(create_time) &gt;=  #{req.startTime} and DATE(create_time) &lt;=  #{req.endTime}
            </if>
        </where>
        order by create_time desc
    </select>