mybatis引用其他文件中的sql片段的实现

<?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="commonSQL">
    <sql id="SQL1">
        select * from 表名 where id = #{id}
    </sql>

    <sql id="SQL2">
        <!--注意再当前页面引用sql 片段不能直接写SQL1， 要namespase + sqlid 才可以，否则会报错-->
        <include refid="commonSQL.SQL1"/>
    </sql>
</mapper>

<?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.xxx.xxx.xxxMapperDao">
    <select id="querySQL1" resultType="java.util.HashMap" parameterType="java.util.HashMap">
        select * from (
         <include refid="commonSQL.SQL1"/>
        )
    </select>

<select id="querySQL2" resultType="java.util.HashMap" parameterType="java.util.HashMap">
        select * from 表名 a
        left join (
         <include refid="commonSQL.SQL1">
            <!-- 如果有参数和sql片段映射不上,可以通过property 重新定义一下变量名称即可-->
            <property name="id" value="#{ID}">
        </include>
        ) b
        on a.id = b.id
    </select>
</mapper>