【新增】教程与分类关联

src/main/java/com/corewing/app/mapper/CourseCategoryMapper.java

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+package com.corewing.app.mapper;
+
+import com.baomidou.mybatisplus.core.mapper.BaseMapper;
+import com.corewing.app.entity.CourseCategory;
+import org.apache.ibatis.annotations.Mapper;
+
+/**
+ * 教程分类 Mapper接口
+ */
+@Mapper
+public interface CourseCategoryMapper extends BaseMapper<CourseCategory> {
+}

src/main/java/com/corewing/app/mapper/CourseCategoryRelationMapper.java

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+package com.corewing.app.mapper;
+
+import com.baomidou.mybatisplus.core.mapper.BaseMapper;
+import com.corewing.app.entity.CourseCategoryRelation;
+import org.apache.ibatis.annotations.Mapper;
+
+
+/**
+ * 教程与教程分类关系Mapper接口
+ */
+@Mapper
+public interface CourseCategoryRelationMapper extends BaseMapper<CourseCategoryRelation> {
+}

src/main/java/com/corewing/app/service/CourseCategoryRelationService.java

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+package com.corewing.app.service;
+
+import com.baomidou.mybatisplus.extension.service.IService;
+import com.corewing.app.entity.CourseCategoryRelation;
+
+public interface CourseCategoryRelationService extends IService<CourseCategoryRelation> {
+}

src/main/java/com/corewing/app/service/impl/CourseCategoryRelationServiceImpl.java

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+package com.corewing.app.service.impl;
+
+import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
+import com.corewing.app.entity.CourseCategoryRelation;
+import com.corewing.app.mapper.CourseCategoryRelationMapper;
+import com.corewing.app.service.CourseCategoryRelationService;
+import org.springframework.stereotype.Service;
+
+@Service
+public class CourseCategoryRelationServiceImpl extends ServiceImpl<CourseCategoryRelationMapper, CourseCategoryRelation> implements CourseCategoryRelationService {
+}

src/main/resources/db/app_course_category_relation.sql

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+/*
+ Navicat Premium Dump SQL
+
+ Source Server         : 120.24.204.180
+ Source Server Type    : MySQL
+ Source Server Version : 80036 (8.0.36)
+ Source Host           : 120.24.204.180:3306
+ Source Schema         : app
+
+ Target Server Type    : MySQL
+ Target Server Version : 80036 (8.0.36)
+ File Encoding         : 65001
+
+ Date: 28/10/2025 13:46:38
+*/
+
+SET NAMES utf8mb4;
+SET FOREIGN_KEY_CHECKS = 0;
+
+-- ----------------------------
+-- Table structure for app_course_category_relation
+-- ----------------------------
+DROP TABLE IF EXISTS `app_course_category_relation`;
+CREATE TABLE `app_course_category_relation` (
+  `id` bigint NOT NULL AUTO_INCREMENT COMMENT 'id',
+  `course_id` bigint DEFAULT NULL COMMENT '教程id',
+  `category_id` bigint DEFAULT NULL COMMENT '教程分类id',
+  PRIMARY KEY (`id`)
+) ENGINE=InnoDB AUTO_INCREMENT=2 DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_general_ci COMMENT='教程与教程分类关系表';
+
+-- ----------------------------
+-- Records of app_course_category_relation
+-- ----------------------------
+BEGIN;
+INSERT INTO `app_course_category_relation` (`id`, `course_id`, `category_id`) VALUES (1, 1, 1);
+COMMIT;
+
+SET FOREIGN_KEY_CHECKS = 1;