在淘宝、京东等电商网站,其门户网站都有一个商品品类的多级联动,鼠标移动,就显示,因为前端不是我做的,所以不说明前端实现,只介绍后端实现。
搭建部署SpringBoot环境
配置文件配置:
开启了对Thymeleaf模块引擎的支持
server:
port: 8081
#logging:
# config: classpath:logback_spring.xml
# level:
# com.muses.taoshop: debug
# path: /data/logs
spring:
datasource:
# 主数据源
shop:
url: jdbc:mysql://127.0.0.1:3306/taoshop?autoReconnect=true&useUnicode=true&characterEncoding=utf8&characterSetResults=utf8&useSSL=false
username: root
password: root
driver-class-name: com.mysql.jdbc.Driver
type: com.alibaba.druid.pool.DruidDataSource
# 连接池设置
druid:
initial-size: 5
min-idle: 5
max-active: 20
# 配置获取连接等待超时的时间
max-wait: 60000
# 配置间隔多久才进行一次检测,检测需要关闭的空闲连接,单位是毫秒
time-between-eviction-runs-millis: 60000
# 配置一个连接在池中最小生存的时间,单位是毫秒
min-evictable-idle-time-millis: 300000
# Oracle请使用select 1 from dual
validation-query: SELECT 'x'
test-while-idle: true
test-on-borrow: false
test-on-return: false
# 打开PSCache,并且指定每个连接上PSCache的大小
pool-prepared-statements: true
max-pool-prepared-statement-per-connection-size: 20
# 配置监控统计拦截的filters,去掉后监控界面sql无法统计,'wall'用于防火墙
filters: stat,wall,slf4j
# 通过connectProperties属性来打开mergeSql功能;慢SQL记录
connection-properties: druid.stat.mergeSql=true;druid.stat.slowSqlMillis=5000
# 合并多个DruidDataSource的监控数据
use-global-data-source-stat: true
# jpa:
# database: mysql
# hibernate:
# show_sql: true
# format_sql: true
# ddl-auto: none
# naming:
# physical-strategy: org.hibernate.boot.entity.naming.PhysicalNamingStrategyStandardImpl
# mvc:
# view:
# prefix: /WEB-INF/jsp/
# suffix: .jsp
#添加Thymeleaf配置
thymeleaf:
cache: false
prefix: classpath:/templates/
suffix: .html
mode: HTML5
encoding: UTF-8
content-type: text/html
#Jedis配置
# jedis :
# pool :
# host : 127.0.0.1
# port : 6379
# password : redispassword
# timeout : 0
# config :
# maxTotal : 100
# maxIdle : 10
# maxWaitMillis : 100000
SpringBoot启动类:
package com.muses.taoshop; import org.mybatis.spring.boot.autoconfigure.MybatisAutoConfiguration; import org.springframework.boot.*; import org.springframework.boot.autoconfigure.*; import org.springframework.boot.autoconfigure.jdbc.DataSourceAutoConfiguration; import org.springframework.boot.autoconfigure.jdbc.DataSourceTransactionManagerAutoConfiguration; import org.springframework.boot.web.servlet.ServletComponentScan; import org.springframework.cache.annotation.EnableCaching; import org.springframework.scheduling.annotation.EnableAsync; import org.springframework.scheduling.annotation.EnableScheduling; import org.springframework.stereotype.*; import org.springframework.transaction.annotation.EnableTransactionManagement; import org.springframework.web.bind.annotation.*; /** * *
* SpringBoot启动配置类 ** @author nicky
* @version 1.00.00
** 修改记录 * 修改后版本: 修改人: 修改日期: 修改内容: **/
@Controller
@EnableScheduling//开启对计划任务的支持
@EnableTransactionManagement//开启对事务管理配置的支持
@EnableCaching
@EnableAsync//开启对异步方法的支持
@EnableAutoConfiguration
@ServletComponentScan
@SpringBootApplication(exclude={DataSourceAutoConfiguration.class,
MybatisAutoConfiguration.class,
DataSourceTransactionManagerAutoConfiguration.class})
public class PortalApplication {@RequestMapping("/")
@ResponseBody
String home() {
return "portal web!";
}@RequestMapping("/doTest")
@ResponseBody
String doTest(){
System.out.println(Thread.currentThread().getName());
String threadName = Thread.currentThread().getName();
return threadName;
}public static void main(String[] args) throws Exception {
SpringApplication.run(PortalApplication.class, args);
}
}写个Controller类跳转到门户网站:
ps:品类多级联动思路其实就是先构建一个树,我这里的做法就是先查询处理,然后通过工具类,进行递归遍历,待会给出工具类代码,仅供参考。listCategory方法其实就是获取所有的品类信息package com.muses.taoshop.web.controller.portal; import com.alibaba.fastjson.JSON; import com.muses.taoshop.item.entity.ItemBrand; import com.muses.taoshop.item.entity.ItemCategory; import com.muses.taoshop.item.entity.ItemPortal; import com.muses.taoshop.item.service.IItemBrankService; import com.muses.taoshop.item.service.IItemCategoryService; import com.muses.taoshop.item.service.IItemService; import com.muses.taoshop.util.CategoryTreeUtils; import com.muses.taoshop.web.controller.BaseController; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.stereotype.Controller; import org.springframework.util.CollectionUtils; import org.springframework.web.bind.annotation.*; import org.springframework.web.servlet.ModelAndView; import java.util.Date; import java.util.List; /** *
* 门户网站控制类 **
* @author nicky
* @version 1.00.00
** 修改记录 * 修改后版本: 修改人: 修改日期: 修改内容: **/
@Controller
@RequestMapping("/portal")
public class IndexController extends BaseController{@Autowired
IItemService iItemService;
@Autowired
IItemBrankService iItemBrankService;
@Autowired
IItemCategoryService iItemCategoryService;/**
* 跳转到门户网站
* @return
*/
@GetMapping(value = "/toIndex.do")
public ModelAndView toIndex(){
info("跳转到门户网站");
ModelAndView mv = this.getModelAndView();
mv.setViewName("index");
List<ItemPortal> items = iItemService.listItemPortal();
CategoryTreeUtils treeUtil = new CategoryTreeUtils();
List<ItemCategory> list = iItemCategoryService.listCategory();
List<ItemCategory> categories = treeUtil.buildCategoryTree(list);
mv.addObject("items" , items);
mv.addObject("categories" , categories);
return mv;
}@GetMapping(value = "/doTest")
@ResponseBody
public String doTest(){
List<ItemBrand> itemBrands = iItemBrankService.listItemBrand();
String str = JSON.toJSON(itemBrands).toString();
return str;
}}
业务接口类:
package com.muses.taoshop.item.service; import com.muses.taoshop.item.entity.ItemCategory; import com.muses.taoshop.item.entity.ItemList; import java.util.List; /** *
* 商品品类信息接口 **
* @author nicky
* @version 1.00.00
** 修改记录 * 修改后版本: 修改人: 修改日期: 2018.06.17 10:59 修改内容: **/
public interface IItemCategoryService {/**
* 查询所有商品品类信息
* @return
*/
List<ItemCategory> listCategory();业务服务实现类:
package com.muses.taoshop.item.service; import com.muses.taoshop.item.entity.ItemCategory; import com.muses.taoshop.item.entity.ItemList; import com.muses.taoshop.item.mapper.ItemCategoryMapper; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.stereotype.Service; import java.util.List; /** *
* 商品品类信息服务实现类 **
* @author nicky
* @version 1.00.00
** 修改记录 * 修改后版本: 修改人: 修改日期: 2018.06.17 11:01 修改内容: **/
@Service
public class ItemCategoryServiceImpl implements IItemCategoryService{@Autowired
ItemCategoryMapper itemCategoryMapper;/**
* 查询所有的商品品类信息
* @return
*/
@Override
public List<ItemCategory> listCategory() {
return itemCategoryMapper.listCategory();
}}
Mybatis相关代码:
<?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.muses.taoshop.item.mapper.ItemCategoryMapper" > <resultMap id="BaseResultMap" type="com.muses.taoshop.item.entity.ItemCategory" > <id column="id" property="id" jdbcType="BIGINT" /> <result column="category_name" property="categoryName" jdbcType="VARCHAR" /> <result column="sjid" property="sjid" jdbcType="BIGINT" /> <result column="last_modify_time" property="lastModifyTime" jdbcType="TIMESTAMP" /> <result column="create_time" property="createTime" jdbcType="TIMESTAMP" /> </resultMap> <sql id="BaseColumnList" > id, category_name as categoryName, sjid, last_modify_time as lastModifyTime, create_time as createTime </sql> <!-- 获取所有的商品品类信息--> <select id="listCategory" resultType="ItemCategory"> SELECT <include refid="BaseColumnList" /> FROM item_category t </select> </mapper>
Mapper接口类:
package com.muses.taoshop.item.mapper; import com.muses.taoshop.item.entity.ItemCategory; import com.muses.taoshop.item.entity.ItemList; import org.apache.ibatis.annotations.Mapper; import org.apache.ibatis.annotations.Param; import java.util.List; @Mapper public interface ItemCategoryMapper { List<ItemCategory> listCategory(); }
实体类:
这里用了lombok的jar来实现,所有不用set和get方法package com.muses.taoshop.item.entity; import com.alibaba.fastjson.annotation.JSONField; import com.fasterxml.jackson.annotation.JsonFormat; import com.fasterxml.jackson.databind.annotation.JsonSerialize; import lombok.Data; import org.springframework.format.annotation.DateTimeFormat; import javax.validation.constraints.NotNull; import java.util.Date; import java.util.List; /** *
* 商品品类 ** @author nicky
* @version 1.00.00
** 修改记录 * 修改后版本: 修改人: 修改日期: 2018.06.09 21:49 修改内容: **/
@Data
public class ItemCategory {
/**
* 商品品类id
*/
private Long id;/**
* 商品品类名称
*/
private String categoryName;/**
* 上级id
*/
private Long sjid;/**
* 上次修改时间
*/
@JSONField(format ="yyyy-MM-dd HH:mm:ss")
private Date lastModifyTime;/**
* 创建时间
*/
@JSONField(format ="yyyy-MM-dd HH:mm:ss")
private Date createTime;/**
* 子菜单
*/
private List<ItemCategory> subCategorys;}
构建品类树的工具类:
package com.muses.taoshop.util; import com.muses.taoshop.item.entity.ItemCategory; import javax.mail.FetchProfile; import java.util.ArrayList; import java.util.List; /** *
* 构造一棵品类树 **
* @author nicky
* @version 1.00.00
** 修改记录 * 修改后版本: 修改人: 修改日期: 2018.06.24 17:12 修改内容: **/
public class CategoryTreeUtils {public List<ItemCategory> commonCategorys;
public List<ItemCategory> list = new ArrayList<ItemCategory>();
public List<ItemCategory> buildCategoryTree(List<ItemCategory> categories ) {
this.commonCategorys = categories;
for (ItemCategory c : categories){
ItemCategory category = new ItemCategory();
if(c.getSjid() == 0){
category.setSjid(c.getSjid());
category.setId(c.getId());
category.setCategoryName(c.getCategoryName());
category.setSubCategorys(treeChild(c.getId()));
list.add(category);
}
}
return list;
}public List<ItemCategory> treeChild(long id){
List<ItemCategory> list = new ArrayList<ItemCategory>();
for(ItemCategory c : commonCategorys){
ItemCategory category = new ItemCategory();
if(c.getSjid() == id){
category.setSjid(c.getSjid());
category.setId(c.getId());
category.setCategoryName(c.getCategoryName());
category.setSubCategorys(treeChild(c.getId()));//递归循环
list.add(category);
}
}
return list;
}
}前端代码:
<div class="headerNav" xmlns:th="http://www.thymeleaf.org"> <div class="layout"> <dl class="all-brands"> <dt class="all-brands-head"> <a href="#">全部商品分类</a> </dt> <dd class="all-brands-list"> <div class="wrap" th:each="c : ${categories}"> <div class="all-sort-list"> <div class="item bo"> <h3> <a href="" th:text="${c.categoryName}"></a></h3> <div class="item-list clearfix"> <div class="close">x</div> <div class="subitem" th:each="s: ${c.subCategorys}"> <dl class="fore1"> <dt th:text="${s.categoryName}"><a th:href="@{'/portal/category/toCategoryList/'+${s.id}}"></a></dt> <dd> <em th:each="ss : ${s.subCategorys} "><a th:href="@{'/portal/category/toCategoryList/'+${ss.id}}" th:text="${ss.categoryName}"></a></em> </dd> </dl> </div> </div> </div> </div> </div> </dd> </dl> </div> </div> </div>
实现的效果如图:可以说是3级联动
这是在开发中的开源项目的一个小功能,源码已经开源,github链接
原创文章,作者:ItWorker,如若转载,请注明出处:https://blog.ytso.com/17054.html