加入首页模板，调试首页三级分类显示，与后端数据对接

book-product/pom.xml

@@ -64,6 +64,13 @@
             <scope>test</scope>
         </dependency>
 
+
+<!--        thymeleaf-->
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-thymeleaf</artifactId>
+        </dependency>
+
 <!--        对象存储-->
 <!--        <dependency>-->
 <!--            <groupId>com.aliyun.oss</groupId>-->

book-product/src/main/java/com/bookstore/bookmall/product/mallProductApplication.java

@@ -43,6 +43,13 @@ import org.springframework.cloud.openfeign.EnableFeignClients;
 *   3、关联自定义的校验器和检验注解
 *
 *
+* 5、模板引擎
+* 1、静态资源都放在static中可以按照路径直接访问
+* 2、页面放在templates下，直接访问
+* 3、springboot访问项目时，默认会找index
+* 4、页面修改时不重启服务器实时更新
+* 导入dev-tools
+* 修改为ctrl shift f9
 * */
 
 

book-product/src/main/java/com/bookstore/bookmall/product/service/CategoryService.java

@@ -1,6 +1,7 @@
 package com.bookstore.bookmall.product.service;
 
 import com.baomidou.mybatisplus.extension.service.IService;
+import com.bookstore.bookmall.product.vo.Catelog2Vo;
 import com.bookstore.common.utils.PageUtils;
 import com.bookstore.bookmall.product.entity.CategoryEntity;
 
@@ -25,5 +26,10 @@ public interface CategoryService extends IService<CategoryEntity> {
     List<CategoryEntity> listWithTree();
 
     void removeMunuByIds(List<Long> asList);
+
+    List<CategoryEntity> getLevel1Category();
+
+    Map<String, List<Catelog2Vo>> getCatalogJson();
+
 }
 

book-product/src/main/java/com/bookstore/bookmall/product/service/impl/CategoryServiceImpl.java

@@ -1,5 +1,6 @@
 package com.bookstore.bookmall.product.service.impl;
 
+import com.bookstore.bookmall.product.vo.Catelog2Vo;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.stereotype.Service;
 
@@ -82,6 +83,43 @@ public class CategoryServiceImpl extends ServiceImpl<CategoryDao, CategoryEntity
         baseMapper.deleteBatchIds(asList);
     }
 
+    @Override
+    public List<CategoryEntity> getLevel1Category() {
+        List<CategoryEntity> entities = baseMapper.selectList(new QueryWrapper<CategoryEntity>().eq("parent_cid", 0));
+        return entities;
+    }
+
+    @Override
+    public Map<String, List<Catelog2Vo>> getCatalogJson() {
+        //查出所有一级分类
+        List<CategoryEntity> level1Category = this.getLevel1Category();
+        Map<String, List<Catelog2Vo>> parent_cid = level1Category.stream().collect(
+                Collectors.toMap(k -> k.getCatId().toString(), v -> {
+            List<CategoryEntity> entities = baseMapper.selectList(
+                    new QueryWrapper<CategoryEntity>().eq("parent_cid", v.getCatId()));
+            List<Catelog2Vo> catelog2Vos = null;
+            if (entities != null) {
+                catelog2Vos = entities.stream().map(item -> {
+                    Catelog2Vo catelog2Vo = new Catelog2Vo(v.getCatId().toString(), null,
+                            item.getCatId().toString(), item.getName());
+                    List<CategoryEntity> level3 = baseMapper.selectList(new QueryWrapper<CategoryEntity>().eq(
+                            "parent_cid", item.getCatId()));
+                    if (level3 != null) {
+                        List<Catelog2Vo.Catelog3Vo> catelog3Vos = level3.stream().map(l3 -> {
+                            Catelog2Vo.Catelog3Vo catelog3Vo = new Catelog2Vo.Catelog3Vo(item.getCatId().toString(),
+                                    l3.getCatId().toString(), l3.getName());
+                            return catelog3Vo;
+                        }).collect(Collectors.toList());
+                        catelog2Vo.setCatalog3List(catelog3Vos);
+                    }
+                    return catelog2Vo;
+                }).collect(Collectors.toList());
+            }
+            return catelog2Vos;
+        }));
+        return parent_cid;
+    }
+
     private List<CategoryEntity> getChildren(CategoryEntity root, List<CategoryEntity> all) {
         //过滤器过滤出子菜单
         List<CategoryEntity> Children = all.stream().filter((categoryEntity -> {

book-product/src/main/java/com/bookstore/bookmall/product/vo/Catelog2Vo.java

@@ -0,0 +1,27 @@
+package com.bookstore.bookmall.product.vo;
+
+import lombok.AllArgsConstructor;
+import lombok.Data;
+import lombok.NoArgsConstructor;
+
+import java.util.List;
+
+@NoArgsConstructor
+@AllArgsConstructor
+@Data
+public class Catelog2Vo {
+    private String catalog1Id;
+    private List<Catelog3Vo> catalog3List;
+    private String id;
+    private String name;
+
+    @NoArgsConstructor
+    @AllArgsConstructor
+    @Data
+    public static class Catelog3Vo {
+        private String catalog2Id;
+        private String id;
+        private String name;
+    }
+
+}

book-product/src/main/java/com/bookstore/bookmall/product/web/IndexController.java

@@ -0,0 +1,43 @@
+package com.bookstore.bookmall.product.web;
+
+
+import com.bookstore.bookmall.product.entity.CategoryEntity;
+import com.bookstore.bookmall.product.service.CategoryService;
+import com.bookstore.bookmall.product.vo.Catelog2Vo;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Controller;
+import org.springframework.ui.Model;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.ResponseBody;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Map;
+
+@Controller
+public class IndexController {
+
+    @Autowired
+    CategoryService categoryService;
+
+    @GetMapping({"/", "/index.html"})
+    public String indexPage(Model model) {
+
+        //查出所有的1级分类
+        List<CategoryEntity> categoryEntityList = categoryService.getLevel1Category();
+
+        //视图解析器进行拼串
+        model.addAttribute("categorys",categoryEntityList);
+        return "index";
+    }
+
+    @ResponseBody
+    @GetMapping("/index/catalog.json")
+    public Map<String, List<Catelog2Vo>> getCataLogJson(){
+        Map<String, List<Catelog2Vo>> map = categoryService.getCatalogJson();
+        return map;
+    }
+
+
+
+}

book-product/src/main/resources/application.yml

@@ -19,6 +19,8 @@ spring:
     name: mall-product
   jackson:
     date-format: yyyy-MM-dd HH:mm:ss
+  thymeleaf:
+    cache: false
 
 mybatis-plus:
   config-locations: classpath*:/mapper/**/*.xml #classpath*中的*指的是不止引用自己路径的mapper，依赖的jar包也扫描
@@ -29,9 +31,7 @@ mybatis-plus:
       logic-not-delete-value: 0
 
 
-
-
 server:
   port: 10000
   error:
-    include-message: always
+    include-message: always