购物车实现1--day16
1.用户退出操作
1.1前置条件
-
业务说明:
当用户单击退出按钮之后, 页面应该重定向到系统首页,同时删除cookie和redis的登录信息. -
页面分析
当用户点击退出操作之后,应该利用jt-web服务器中的UserController完成该业务.
1.2编辑jt-web的UserController
/**
* 用户退出:
* url: http://www.jt.com/user/logout.html
* 没有传递参数
* 返回值:String 重定向返回系统首页
* 业务实现思路:
* 先获取cookie中的数据 NAME=JT_TICKET
* 1.删除redis中数据 key-value key=cookie中的value
* 2.删除Cookie记录 根据cookie名称 设置存活时间即可
*
* 注意事项:request对象中只能传递cookie的那么和value.不能传递其他数据参数
*/
@RequestMapping("logout")
public String logout(HttpServletRequest request,HttpServletResponse response) {
Cookie[] cookies = request.getCookies();//获取所有的cookie
if(cookies !=null && cookies.length>0) {//如果cookie为0或长度不大于0则直接返回重定向到首页
for (Cookie cookie : cookies) {//遍历cookie
if("JT_TICKET".equalsIgnoreCase(cookie.getName())) {//找到key为JT_TICKET的cookie
String ticket =cookie.getValue();
//删除redis
jedisCluster.del(ticket);
//删除cookie
cookie.setDomain("jt.com"); //jt.com结尾的可以域名,实现Cookie数据的共享
cookie.setPath("/");
cookie.setMaxAge(0);//立即删除:0/暂时不删,关闭浏览器删除:-0;
//将Cookie保存到客户端
response.addCookie(cookie);
break;
}
}
}
//转发forward:/
return "redirect:/";//重定向到系统首页
}
2 商品数据展现
2.1前置条件
- 业务描述
当用户看中某一个商品时,点击该商品,应该展现的是商品的详情信息.
- 将JT-MANAGE项目改造为Dubbo项目
package com.jt.web.service;
import org.springframework.beans.factory.annotation.Autowired;
import com.alibaba.dubbo.config.annotation.Service;
import com.jt.service.DubboItemService;
@Service
public class DubboItemServiceImpl implements DubboItemService {
@Autowired
private ItemMapper itemMapper;
@Autowired
private ItemDescMapper itemDescMapper;
}
- 编辑manage.jt.com的yml配置文件, 注意duubo端口号及dubbo服务名称
server:
port: 8091
servlet:
context-path: /
spring:
datasource:
#引入druid数据源
#type: com.alibaba.druid.pool.DruidDataSource
#driver-class-name: com.mysql.cj.jdbc.Driver
url: jdbc:mysql://127.0.0.1:3306/jtdb?serverTimezone=GMT%2B8&useUnicode=true&characterEncoding=utf8&autoReconnect=true&allowMultiQueries=true
username: root
password: 密码
mvc:
view:
prefix: /WEB-INF/views/
suffix: .jsp
#mybatis-plush配置
mybatis-plus:
type-aliases-package: com.jt.pojo
mapper-locations: classpath:/mybatis/mappers/*.xml
configuration:
map-underscore-to-camel-case: true
logging:
level:
com.jt.mapper: debug
#关于Dubbo配置
dubbo:
scan:
basePackages: com.jt #指定dubbo的包路径
application: #应用名称
name: provider-manage #一个接口对应一个服务名称
registry:
address: zookeeper://192.168.126.129:2181?backup=192.168.126.129:2182,192.168.126.129:2183,192.168.126.129:2184,192.168.126.129:2185
protocol: #指定协议
name: dubbo #使用dubbo协议(tcp-ip) web-controller直接调用sso-Service
port: 20881 #每一个服务都有自己特定的端口 不能重复.
2.2编辑JT-WEB ItemController
package com.jt.controllor;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import com.alibaba.dubbo.config.annotation.Reference;
import com.jt.pojo.Item;
import com.jt.pojo.ItemDesc;
import com.jt.service.DubboItemService;
@Controller
@RequestMapping("/items")
public class ItemController {
@Reference(check = false) //启动时暂时不校验提供者
private DubboItemService itemService;
/**
* http://www.jt.com/items/562379.html 跳转到商品页面
* ${item.title } 商品信息
* ${itemDesc.itemDesc } 商品详情信息
*
* 业务说明: 根据商品id查询执行的商品/商品详情信息,之后在页面中展现.
* @param itemId
* @return
*/
@RequestMapping("/{itemId}")
public String findItemById(@PathVariable Long itemId,Model model) {
Item item = itemService.findItemById(itemId);
ItemDesc itemDesc = itemService.findItemDescById(itemId);
model.addAttribute("item", item);
model.addAttribute("itemDesc", itemDesc);
return "item"; //item.jsp
}
}
2.3编辑JT-MANAGE ItemService
package com.jt.web.service;
import org.springframework.beans.factory.annotation.Autowired;
import com.alibaba.dubbo.config.annotation.Service;
import com.jt.mapper.ItemDescMapper;
import com.jt.mapper.ItemMapper;
import com.jt.pojo.Item;
import com.jt.pojo.ItemDesc;
import com.jt.service.DubboItemService;
@Service
public class DubboItemServiceImpl implements DubboItemService {
@Autowired
private ItemMapper itemMapper;
@Autowired
private ItemDescMapper itemDescMapper;
@Override
public Item findItemById(Long itemId) {
return itemMapper.selectById(itemId);
}
@Override
public ItemDesc findItemDescById(Long itemId) {
return itemDescMapper.selectById(itemId);
}
}
2.4效果
3 定义购物车模块
3.1根据表设计pojo
package com.jt.pojo;
import com.baomidou.mybatisplus.annotation.IdType;
import com.baomidou.mybatisplus.annotation.TableId;
import com.baomidou.mybatisplus.annotation.TableName;
import lombok.Data;
import lombok.experimental.Accessors;
@Accessors(chain = true)
@Data
@TableName("tb_cart")
public class Cart extends BasePojo{
@TableId(type = IdType.AUTO)
private Long id; //id
private Long userId; //用户
private Long itemId; //商品
private String itemTitle; //标题
private String itemImage; //主图
private Long itemPrice; //价格
private Integer num; //购买数量
}
3.2添加jt-cart模块
- 启动类
package com.jt;
import org.mybatis.spring.annotation.MapperScan;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
@SpringBootApplication
@MapperScan("com.jt.mapper")
public class SpringBootRun {
public static void main(String[] args) {
SpringApplication.run(SpringBootRun.class, args);
}
}
配置application文件
server:
port: 8094
servlet:
context-path: /
spring:
datasource:
#引入druid数据源
#type: com.alibaba.druid.pool.DruidDataSource
#driver-class-name: com.mysql.cj.jdbc.Driver
url: jdbc:mysql://127.0.0.1:3306/jtdb?serverTimezone=GMT%2B8&useUnicode=true&characterEncoding=utf8&autoReconnect=true&allowMultiQueries=true
username: root
password: 密码
mvc:
view:
prefix: /WEB-INF/views/
suffix: .jsp
#mybatis-plush配置
mybatis-plus:
type-aliases-package: com.jt.pojo
mapper-locations: classpath:/mybatis/mappers/*.xml
configuration:
map-underscore-to-camel-case: true
logging:
level:
com.jt.mapper: debug
#关于Dubbo配置
dubbo:
scan:
basePackages: com.jt #指定dubbo的包路径
application: #应用名称
name: provider-cart #一个接口对应一个服务名称
registry:
address: zookeeper://192.168.126.129:2181?backup=192.168.126.129:2182,192.168.126.129:2183,192.168.126.129:2184,192.168.126.129:2185
protocol: #指定协议
name: dubbo #使用dubbo协议(tcp-ip) web-controller直接调用sso-Service
port: 20882 #每一个服务都有自己特定的端口 不能重复.
- 添加CartMapper
package com.jt.mapper;
import com.baomidou.mybatisplus.core.mapper.BaseMapper;
import com.jt.pojo.Cart;
public interface CartMapper extends BaseMapper<Cart>{
}
- 添加DubboCartServiceImpl
package com.jt.service;
import com.alibaba.dubbo.config.annotation.Service;
@Service //(timeout = 10000) //dubbo service注解 10秒超时 内部实现rpc
public class DubboCartServiceImpl implements DubboCartService {
}
3.2 在jt-web添加CartController
package com.jt.controllor;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import com.alibaba.dubbo.config.annotation.Reference;
import com.jt.service.DubboCartService;
@Controller
@RequestMapping("/cart/")
public class CartController {
@Reference(check = false)
private DubboCartService cartService;
@RequestMapping("show")
public String show() {
return "cart";
}
}
4 购物车打开
4.1修改CartController
package com.jt.controllor;
import java.util.List;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;
import com.alibaba.dubbo.config.annotation.Reference;
import com.jt.pojo.Cart;
import com.jt.service.DubboCartService;
@Controller
@RequestMapping("/cart/")
public class CartController {
@Reference(check = false)
private DubboCartService cartService;
@RequestMapping("show")
public String show(Model model) {
//1.获取userId 利用单点登入的方式获取userId 暂时写死
Long userId =7L;
//2.根据userId查询公务车数据
List<Cart> cartList =cartService.findCartListByUserId(userId);
model.addAttribute("cartList",cartList);
return "cart";
}
}
4.2修改DubboCartServiceImpl
package com.jt.service;
import java.util.List;
import org.springframework.beans.factory.annotation.Autowired;
import com.alibaba.dubbo.config.annotation.Service;
import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
import com.jt.mapper.CartMapper;
import com.jt.pojo.Cart;
@Service //(timeout = 10000) //dubbo service注解 10秒超时 内部实现rpc
public class DubboCartServiceImpl implements DubboCartService {
@Autowired
private CartMapper cartMapper;
@Override
public List<Cart> findCartListByUserId(Long userId) {
QueryWrapper<Cart> queryWrapper = new QueryWrapper<Cart>();
queryWrapper.eq("user_id", userId);
return cartMapper.selectList(queryWrapper);
}
}
5 购物车加/减商品数量 分析
http://www.jt.com/cart/update/num/{itemId}/{num}
5.1编辑CartController
/**
* 业务需求: 完成购物车商品跟新操作
* 1.url:http://www.jt.com/cart/update/num/562379/9
* 2.请求参数:562379-itemId 9-num
* 3.返回值结果:void
*/
@RequestMapping("/update/num/{itemId}/{num}")
@ResponseBody
public void updateCart(Cart cart) { //参数如果和属性名称一致则可以直接赋值.
Long userId =7L;
cart.setUserId(userId);
cartService.updateCartNum(cart);
}
5.2编辑DubboCartServiceImpl
@Override
public void updateCartNum(Cart cart) {
Cart cart1=new Cart();
cart1.setNum(cart.getNum());
UpdateWrapper<Cart> updateWrapper = new UpdateWrapper<Cart>();
updateWrapper.eq("item_id", cart.getItemId())
.eq("user_id", cart.getUserId());
cartMapper.update(cart1, updateWrapper);
}
6 购物车新增
- 业务分析
当查询商品之后,点击新增购物车时.应该跳转到购物车展现页面. 之后完成购物车新增操作.
强调:
1.当用户第一次新增购物车时,应该入库保存
2.当用户重复添加时,应该只更新商品的数量.
6.1编辑jt-web CartController
/**
* url:http://www.jt.com/cart/add/562379.html
* 参数:Cart
* 返回值:重定向到购物车页面
*/
@RequestMapping("add/{itemId}")
public String saveCart(Cart cart) {
Long userId =7L;
cart.setUserId(userId);
cartService.saveCart(cart);
return "redirect:/cart/show.html";
}
6.2编辑DubboCartServiceImpl
@Override
public void saveCart(Cart cart) {
//1.查询数据库中是否有该记录 itemId和userId
QueryWrapper<Cart> queryWrapper = new QueryWrapper<Cart>();
queryWrapper.eq("item_id", cart.getItemId())
.eq("user_id", cart.getUserId());
Cart cartDB =cartMapper.selectOne(queryWrapper);
if(cartDB==null) {//说明是第一次
cart.setCreated(new Date())
.setUpdated(cart.getCreated());
cartMapper.insert(cart);
}else {//只跟新商品数量
int num =cart.getNum()+cartDB.getNum();
//生成代码
// Cart cart1 =new Cart();
// cart1.setNum(cart.getNum())
// .setId(cartDB.getId())
// .setUpdated(new Date());
// cartMapper.updateById(cart1);
//手写sql代码
cartMapper.updateCartNum(cartDB.getId(),num,new Date());
}
}
ps:手写在mapper里面写
@Update("update tb_cart set num=#{num},updated=#{date} where id=#{id}")
void updateCartNum(Long id, int num, Date date);