refactor: 通知公告重构

src/main/resources/mapper/system/UserRoleMapper.xml

@@ -0,0 +1,29 @@
+<?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.youlai.boot.system.mapper.UserRoleMapper">
+
+    <!-- 根据用户ID获取角色ID集合 -->
+    <select id="listRoleIdsByUserId" resultType="java.lang.Long">
+        SELECT
+            role_id
+        FROM
+            sys_user_role
+        WHERE
+            user_id = #{userId}
+    </select>
+
+    <!-- 获取角色绑定的用户数 -->
+    <select id="countUsersForRole" resultType="java.lang.Integer">
+        SELECT
+            count(*)
+        FROM
+            sys_user_role t1
+            INNER JOIN sys_role t2 ON t1.role_id = t2.id AND t2.is_deleted = 0
+            INNER JOIN sys_user t3 ON t1.user_id = t3.id
+            AND t3.is_deleted = 0
+        WHERE
+            t1.role_id = #{roleId}
+    </select>
+</mapper>