增加系统管理代码框架

src/main/java/com/rj/mapper/sys/MenuMapper.java

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+package com.rj.mapper.sys;
+
+import com.rj.entity.sys.Menu;
+import com.baomidou.mybatisplus.core.mapper.BaseMapper;
+
+/**
+ * <p>
+ * 菜单表 Mapper 接口
+ * </p>
+ *
+ * @author 系统生成
+ * @since 2025-08-07
+ */
+public interface MenuMapper extends BaseMapper<Menu> {
+
+}

src/main/java/com/rj/mapper/sys/RoleMapper.java

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+package com.rj.mapper.sys;
+
+import com.rj.entity.sys.Role;
+import com.baomidou.mybatisplus.core.mapper.BaseMapper;
+
+/**
+ * <p>
+ * 角色表 Mapper 接口
+ * </p>
+ *
+ * @author 系统生成
+ * @since 2025-08-07
+ */
+public interface RoleMapper extends BaseMapper<Role> {
+
+}

src/main/java/com/rj/mapper/sys/UserMapper.java

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+package com.rj.mapper.sys;
+
+import com.rj.entity.sys.User;
+import com.baomidou.mybatisplus.core.mapper.BaseMapper;
+
+/**
+ * <p>
+ * 用户表 Mapper 接口
+ * </p>
+ *
+ * @author 系统生成
+ * @since 2025-08-07
+ */
+public interface UserMapper extends BaseMapper<User> {
+
+}

src/main/java/com/rj/mapper/sys/UserRoleMapper.java

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+package com.rj.mapper.sys;
+
+import com.rj.entity.sys.UserRole;
+import com.baomidou.mybatisplus.core.mapper.BaseMapper;
+
+/**
+ * <p>
+ * 用户角色关联表 Mapper 接口
+ * </p>
+ *
+ * @author 系统生成
+ * @since 2025-08-07
+ */
+public interface UserRoleMapper extends BaseMapper<UserRole> {
+
+}