maven镜像配置

<mirrors>
    <!-- mirror
     | Specifies a repository mirror site to use instead of a given repository. The repository that
     | this mirror serves has an ID that matches the mirrorOf element of this mirror. IDs are used
     | for inheritance and direct lookup purposes, and must be unique across the set of mirrors.
     |
    <mirror>
      <id>mirrorId</id>
      <mirrorOf>repositoryId</mirrorOf>
      <name>Human Readable Name for this Mirror.</name>
      <url>http://my.repository.com/repo/path</url>
    </mirror>
     -->
	 <mirror>
		<id>alimaven</id>
		<mirrorOf>central</mirrorOf>
		<name>aliyun maven</name>
		<url>http://maven.aliyun.com/nexus/content/repositories/central/</url>
	 </mirror>
  </mirrors>

mapper的xml文件开头格式

<?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">
<mapper namespace="com.lovo.system.mapper.DeptMapper">
</mapper>

mapper里面写查询放到实体类里的children里面

<resultMap id="deptTreeMap" type="Dept">
        <id column="dept_id" jdbcType="INTEGER" property="deptId"/>
        <result column="dept_name" jdbcType="VARCHAR" property="deptName"/>
        <result column="parent_id" jdbcType="INTEGER" property="parentId"/>
        <result column="order_num" jdbcType="INTEGER" property="orderNum"/>
        <result column="create_time" jdbcType="TIMESTAMP" property="createTime"/>
        <result column="modify_time" jdbcType="TIMESTAMP" property="modifyTime"/>
        <collection property="children" ofType="Dept" select="selectAllDeptTree" column="{parent_id = dept_id}"/>
    </resultMap>

    <select id="selectAllDeptTree" resultMap="deptTreeMap">
        select
        dept_id, dept_name, parent_id, order_num, create_time, modify_time
        from dept
        <where>
            <choose>
                <when test="parent_id!=null">
                    and parent_id = #{parent_id}
                </when>
                <otherwise>
                    and parent_id = 0
                </otherwise>
            </choose>
        </where>
        order by order_num
    </select>