查询分类类别

spzx-manager/src/main/java/cn/bunny/controller/CategoryController.java

@@ -5,6 +5,8 @@ import cn.bunny.common.spzx.model.entity.product.Category;
 import cn.bunny.common.spzx.model.vo.common.Result;
 import cn.bunny.common.spzx.model.vo.common.ResultCodeEnum;
 import cn.bunny.service.CategoryService;
+import io.swagger.v3.oas.annotations.Operation;
+import io.swagger.v3.oas.annotations.tags.Tag;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.web.bind.annotation.GetMapping;
 import org.springframework.web.bind.annotation.PathVariable;
@@ -13,12 +15,14 @@ import org.springframework.web.bind.annotation.RestController;
 
 import java.util.List;
 
+@Tag(name = "查询分类")
 @RestController
 @RequestMapping("/admin/product/category")
 public class CategoryController {
     @Autowired
     CategoryService categoryService;
 
+    @Operation(summary = "查询分类类别", description = "使用懒加载")
     @GetMapping("/findCategoryList/{id}")
     public Result findCategoryList(@PathVariable("id") Long id) {
         List<Category> categoryList = categoryService.findCategoryList(id);

spzx-manager/src/main/java/cn/bunny/mapper/CategoryMapper.java

@@ -0,0 +1,15 @@
+package cn.bunny.mapper;
+
+import cn.bunny.common.spzx.model.entity.product.Category;
+import org.apache.ibatis.annotations.Mapper;
+
+import java.util.List;
+
+@Mapper
+public interface CategoryMapper {
+    // 查询分类类别
+    List<Category> selectCategoryByParentId(Long id);
+
+    // 查询是否有下级菜单
+    int selectCountByParentId(Long parentId);
+}

spzx-manager/src/main/java/cn/bunny/service/impl/CategoryServiceImpl.java

@@ -1,15 +1,31 @@
 package cn.bunny.service.impl;
 
 import cn.bunny.common.spzx.model.entity.product.Category;
+import cn.bunny.mapper.CategoryMapper;
 import cn.bunny.service.CategoryService;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Service;
+import org.springframework.util.CollectionUtils;
 
 import java.util.List;
 
+@Service
 public class CategoryServiceImpl implements CategoryService {
+    @Autowired
+    private CategoryMapper categoryMapper;
 
     // 根据id查询分类列表
     @Override
     public List<Category> findCategoryList(Long id) {
-        return null;
+        List<Category> categoryList = categoryMapper.selectCategoryByParentId(id);
+
+        if (!CollectionUtils.isEmpty(categoryList)) {
+            categoryList.forEach(category -> {
+                int count = categoryMapper.selectCountByParentId(category.getId());
+
+                category.setHasChildren(count > 0);
+            });
+        }
+        return categoryList;
     }
-}
+}

spzx-manager/src/main/resources/mapper/category/CategoryMapper.xml

@@ -0,0 +1,25 @@
+<?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="cn.bunny.mapper.CategoryMapper">
+    <resultMap id="categoryMap" type="cn.bunny.common.spzx.model.entity.product.Category" autoMapping="true"/>
+
+    <!-- 用于select查询公用抽取的列 -->
+    <sql id="columns">
+        id,name,image_url,parent_id,status,order_num,create_time,update_time,is_deleted
+    </sql>
+
+    <!-- 查询下层分类 -->
+    <select id="selectCategoryByParentId" resultType="cn.bunny.common.spzx.model.entity.product.Category">
+        select
+        <include refid="columns"/>
+        from category where parent_id=#{id} and is_deleted=0 order by id desc;
+    </select>
+
+    <!-- 查询是否有下层分类 -->
+    <select id="selectCountByParentId" resultType="java.lang.Integer">
+        select count(*)
+        from category
+        where parent_id = #{id}
+          and is_deleted = 0
+    </select>
+</mapper>