2021-10-09购物车功能

一加入购物车

package com.zking.vo;
 
public class ShoppingVo {
	private String name;
	private float price;
	private int num;
	private float total;
 
	private String consignee;
	private String phone;
	private String postalcode;
	private String address;
	private int sendType;
 
	private String pageStr;
 
	public String getName() {
		return name;
	}
 
	public void setName(String name) {
		this.name = name;
	}
 
	public float getPrice() {
		return price;
	}
 
	public void setPrice(float price) {
		this.price = price;
	}
 
	public int getNum() {
		return num;
	}
 
	public void setNum(int num) {
		this.num = num;
	}
 
	public float gettotal() {
		return total;
	}
 
	public void settotal(float total) {
		this.total = total;
	}
 
	public String getConsignee() {
		return consignee;
	}
 
	public void setConsignee(String consignee) {
		this.consignee = consignee;
	}
 
	public String getPhone() {
		return phone;
	}
 
	public void setPhone(String phone) {
		this.phone = phone;
	}
 
	public String getPostalcode() {
		return postalcode;
	}
 
	public void setPostalcode(String postalcode) {
		this.postalcode = postalcode;
	}
 
	public String getAddress() {
		return address;
	}
 
	public void setAddress(String address) {
		this.address = address;
	}
 
	public int getSendType() {
		return sendType;
	}
 
	public void setSendType(int sendType) {
		this.sendType = sendType;
	}
 
	public String getPageStr() {
		return pageStr;
	}
 
	public void setPageStr(String pageStr) {
		this.pageStr = pageStr;
	}
 
	@Override
	public String toString() {
		return "ShoppingVo [name=" + name + ", price=" + price + ", num=" + num + ", total=" + total + ", consignee="
				+ consignee + ", phone=" + phone + ", postalcode=" + postalcode + ", address=" + address + ", sendType="
				+ sendType + ", pageStr=" + pageStr + "]";
	}
 
	public ShoppingVo(String name, float price, int num, float total, String consignee, String phone, String postalcode,
			String address, int sendType, String pageStr) {
		super();
		this.name = name;
		this.price = price;
		this.num = num;
		this.total = total;
		this.consignee = consignee;
		this.phone = phone;
		this.postalcode = postalcode;
		this.address = address;
		this.sendType = sendType;
		this.pageStr = pageStr;
	}
	public ShoppingVo() {
		// TODO Auto-generated constructor stub
	}
 
}

2.购物车没有相应的数据库表，所以没有dao类

3.子控制器内

public String add(HttpServletRequest req, HttpServletResponse resp) {
        HttpSession session = req.getSession();
        User user = (User)session.getAttribute("cuser");
        ObjectMapper om=new ObjectMapper();
        if(user!=null) {
            long id = user.getId();
            List shopGoodsVos=null;
            String info =(String) session.getAttribute("shopping_"+id);
            if(StringUtils.isNotBlank(info)) {
                try {
                    shopGoodsVos=om.readValue(info, List.class);
                }catch (Exception e) {
                    e.printStackTrace();
                }
            }else {
                shopGoodsVos=new ArrayList<>();
            }
            shopGoodsVos.add(vo);
            try {
                session.setAttribute("shopping_"+id, om.writevalueAsString(shopGoodsVos));
            } catch (JsonProcessingException e) {
                e.printStackTrace();
            }
            req.setAttribute("shopGoodsVos", shopGoodsVos);
        }
        return "shoppingCar";
    }

 4.mvc文件的配置

1.通过session查询

public String list(HttpServletRequest req, HttpServletResponse resp) {
		HttpSession session = req.getSession();
		User user = (User)session.getAttribute("cuser");
		ObjectMapper om=new ObjectMapper();
		String info =(String) session.getAttribute("shopping_"+user.getId());
		try {
			List shopGoodsVos=om.readValue(info, List.class);
			req.setAttribute("shopGoodsVos", shopGoodsVos);
		}catch (Exception e) {
			e.printStackTrace();
		}
		return "shoppingCar";
	}

1.子控制器内

public void clear(HttpServletRequest req, HttpServletResponse resp) throws JsonProcessingException, IOException {
		HttpSession session = req.getSession();
		User user = (User)session.getAttribute("cuser");
		session.removeAttribute("shopping_"+user.getId());
		ResponseUtil.writeJson(resp, "1");
	}