xml标签用法

1.xml标签用法

1.1<where> <if> ,<foreach>

    <select id="listByRangeCode" resultType="io.supers.system.entity.SysRoleEntity">
		select DISTINCT sr.role_id, sr.*
		FROM sys_role sr
		LEFT JOIN sys_user_role sur on sur.role_id = sr.role_id
		<where>
			<if test="userId != null and userId != ''">
				and (sr.create_user_id = #{userId}
				OR sur.user_id = #{userId})
			</if>
			<if test="rangeCode != null and rangeCode != ''">
				and
				<foreach item="item" collection="rangeCode"  open="(" separator=" or " close=")">
					FIND_IN_SET(#{item}, sr.range_code)
				</foreach>
			</if>
		</where>
	</select>

select DISTINCT sr.role_id, sr.* FROM sys_role sr LEFT JOIN sys_user_role sur on sur.role_id = sr.role_id WHERE ( FIND_IN_SET(?, sr.range_code) or FIND_IN_SET(?, sr.range_code) )