**** 多层级联，在底层接收外部传入的参数方法：在外层查出来，在传入里层
（可能看起来很蠢，但是这是我能想到的唯一办法了
）
<resultMaptype="com.statistic.entity"id="userProject">
<id property="id"column="id"/>
<result property="name"column="name" />
<collection property="basicAttributes"javaType="java.util.List" column="{id=id,user_id=user_id,year=year,month=month}"
ofType="com..statistic.entity."select="selectBasicAttribute" >
</collection>
</resultMap>
<select id="selectProject"resultMap="userProject">
SELECTdistinct pp.id id ,pp.`name` ,ti.user_iduser_id,YEAR(ti.modified_time) year,MONTH(ti.modified_time) month FROM p_task_info ti
*** 可以吧变量放进参数查出来
select nc.*,#{loginUser_id} loginUser_id
,uu.nicknamenickname, uui.head_pic_path headPic,count(nl.id) likeNum
*** Delete语句中使用select语句
delete news_comment FROM news_comment
join (SELECT id fromnews_comment where 1=1
<includerefid="conds" />) t
on news_comment.parent_id=t.id
*** 加入自己下载下来的jar包
<!-- 正则表达式 -->
<dependency>
<groupId>com.woun.product</groupId>
<artifactId>jakarta-oro</artifactId>
<version>1.0</version>
</dependency>
*** 阿里云Maven仓库地址：http://maven.aliyun.com/nexus/#view-repositories;public~browsestorage
在maven的settings.xml 文件里配置mirrors的子节点，添加如下mirror
<mirror>
<id>nexus-aliyun</id>
<mirrorOf>*</mirrorOf>
<name>Nexus aliyun</name>
<url>http://maven.aliyun.com/nexus/content/groups/public</url>
</mirror>
***注入参数写法
task_ids:[1,2,3]
@RequestParam("task_ids")List<Long> taskIds
ids：“abc，cde，def”
@RequestParam("ids")String ids
public Result updateAuditors(String data) {
//data="{'task_ids':[1,2,3],'auditor_id':5,'auditor_hierarchy':2,'auditor_type':'2','auditor_name':'余家辉'}";
AuditorsVo auditorsVo = JSON.parseObject(data, AuditorsVo.class);
***统计sql语句
SELECT IFNULL((SELECT remaining_sum fromu_wallet_info WHERE user_id=#{user_id}),0) AS sumMoney,
IFNULL((SELECT SUM(freeze_price) fromu_freeze_record WHERE user_id=#{user_id}),0) as freezeMoney,
sum( CASE WHEN trade_type='1' THENtrade_price ELSE 0 END) as rechargeMoney,
sum( CASE WHEN trade_type='2' THENtrade_price ELSE 0 END) as withdrawMoney,
sum( CASE WHEN trade_type='4' ORtrade_type='6' OR trade_type='10' OR trade_type='8' THEN trade_price ELSE 0END) as incomeMoney,
sum(CASE WHEN trade_type='5' OR trade_type='7' OR trade_type='11' ORtrade_type='9'THEN trade_price ELSE 0 END) as payMoney
FROM u_trade_record
WHERE user_id=#{user_id}