JSP+javabean實作購物車功能

聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽

JSP+javabean實作購物車功能

Product.java

package shopping.cart;


import java.io.Serializable;


@SuppressWarnings("serial")
public class Product implements Serializable{//搴忓垪鍖?	private String id;//浜у搧鏍囪瘑
	private String name;//浜у搧鍚嶇О
	private String description;//浜у搧鎻忚堪
	private double price;//浜у搧浠鋒牸
		
	public Product(){}
	public Product(String id,String name,String description,double price){
		this.id = id;
		this.name = name;
		this.description = description;
		this.price = price;
	}
		
	public void setId(String id){
		this.id = id;
	}
	public void setName(String name){
		this.name = name;
	}
	public void setDescription(String description){
		this.description = description;
	}
	public void setPrice(double price){
		this.price = price;
	}
		
	public String getId(){
		return this.id;
	}
	public String getName(){
		return this.name;
	}
	public String getDescription(){
		return this.description;
	}
	public double getPrice(){
		return this.price;
	}
}

CartItem.java

package shopping.cart;

public class CartItem {  
    private Product product;  
  
    private int count;  
  
    public int getCount() {  
        return count;  
    }  
  
    public void setCount(int count) {  
        this.count = count;  
    }  
  
    public Product getProduct() {  
        return product;  
    }  
  
    public void setProduct(Product product) {  
        this.product = product;  
    }  
}

Cart.java

package shopping.cart;


import java.util.ArrayList; 聽
import java.util.Iterator; 聽
import java.util.List; 聽
聽聽
public class Cart { 聽
聽 聽 List<CartItem> items = new ArrayList<CartItem>(); 聽
聽聽
聽 聽 public List<CartItem> getItems() { 聽
聽 聽 聽 聽 return items; 聽
聽 聽 } 聽
聽聽
聽 聽 public void setItems(List<CartItem> items) { 聽
聽 聽 聽 聽 this.items = items; 聽
聽 聽 } 聽
聽 聽 聽聽
聽 聽 public void add(CartItem ci) { 聽
聽 聽 聽 聽 for (Iterator<CartItem> iter = items.iterator(); iter.hasNext();) { 聽
聽 聽 聽 聽 聽 聽 CartItem item = iter.next(); 聽
聽 聽 聽 聽 聽 聽 if(item.getProduct().getId() == ci.getProduct().getId()) { 聽
聽 聽 聽 聽 聽 聽 聽 聽 item.setCount(item.getCount() + 1); 聽
聽 聽 聽 聽 聽 聽 聽 聽 return; 聽
聽 聽 聽 聽 聽 聽 } 聽
聽 聽 聽 聽 } 聽
聽 聽 聽 聽 聽聽
聽 聽 聽 聽 items.add(ci); 聽
聽 聽 } 聽
聽 聽 聽聽
聽 聽 public double getTotalPrice() { 聽
聽 聽 聽 聽 double d = 0.0; 聽
聽 聽 聽 聽 for(Iterator<CartItem> it = items.iterator(); it.hasNext(); ) { 聽
聽 聽 聽 聽 聽 聽 CartItem current = it.next(); 聽
聽 聽 聽 聽 聽 聽 d += current.getProduct().getPrice() * current.getCount(); 聽
聽 聽 聽 聽 } 聽
聽 聽 聽 聽 return d; 聽
聽 聽 } 聽
聽 聽 聽聽
聽 聽 public void deleteItemById(String productId) { 聽
聽 聽 聽 聽 for (Iterator<CartItem> iter = items.iterator(); iter.hasNext();) { 聽
聽 聽 聽 聽 聽 聽 CartItem item = iter.next(); 聽
聽 聽 聽 聽 聽 聽 if(item.getProduct().getId().equals(productId)) {
聽 聽 聽 聽 聽 聽 聽 聽 iter.remove();
聽 聽 聽 聽 聽 聽 聽 聽 return;
聽 聽 聽 聽 聽 聽 }
聽 聽 聽 聽 }
聽 聽 } 聽
}

ShowProducts.jsp

<%@ page language="java" import="java.util.*" pageEncoding="GB18030"%>  
<%@ page import="shopping.cart.*"%>  
<%
    String path = request.getContextPath();  
    String basePath = request.getScheme() + "://" + request.getServerName() + ":" + request.getServerPort() + path + "/";  
%>

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">  
<html>  
    <head>
        <title>My JSP 'ShowProductsJSP.jsp' starting page</title>  
        <meta http-equiv="pragma" content="no-cache">  
        <meta http-equiv="cache-control" content="no-cache">  
        <meta http-equiv="expires" content="0">  
        <meta http-equiv="keywords" content="keyword1,keyword2,keyword3">  
        <meta http-equiv="description" content="This is my page">   
    </head>  
    <body bgcolor="#ffffff">  
        <% 
            Map products = new HashMap();  
            products.put("1612001", new Product("1612001", "mp3鎾斁鍣?,"鏁堟灉寰堜笉閿欑殑mp3鎾斁鍣紝瀛樺偍绌洪棿杈?B", 100.00));  
            products.put("1612002", new Product("1612002", "鏁扮爜鐩告満", "鍍忕礌500涓囷紝10鍊嶅厜瀛﹀彉鐒?,500.00));  
            products.put("1612003", new Product("1612003", "鏁扮爜鎽勫儚鏈?,"120涓囪薄绱狅紝鏀寔澶滄櫙鎷嶆憚锛?0鍊嶅厜瀛﹀彉鐒?, 200.00));  
            products.put("1612004", new Product("1612004", "杩蜂綘mp4","甯傞潰鎵?鑳借鍒扮殑鏈?濂界殑mp4鎾斁鍣紝鍥戒駭", 300.00));  
            products.put("1612005", new Product("1612005", "澶氬姛鑳芥墜鏈?,"闆唌p3鎾斁銆?0涓囪薄绱犳暟鐮佺浉鏈猴紝鎵嬫満鍔熻兘浜庝竴浣?, 400.00));  
            products.put("1612006", new Product("1612006", "鑻規灉4S","楂樿吹鐨勫搧鐗屾墜鏈猴紝鏅鴻兘鎵嬫満锛屽叕楦′腑鐨勬垬鏂楁満",2399.00)); 
            session.setAttribute("products", products);
        %>  
        <H1>浜у搧鏄劇ず</H1>
        <form name="productForm" action="" method="POST">  
            <input type="hidden" name="action" value="purchase">  
            <table  cellspacing="0">  
                <tr bgcolor="#CCCCCC">
                    <tr bgcolor="#CCCCCC">  
                        <td>搴忓彿</td>  
                        <td>浜у搧鍚嶇О</td>  
                        <td>浜у搧鎻忚堪</td>  
                        <td>浜у搧鍗曚環锛堬駿锛?lt;/td>
                        <td>娣誨姞鍒拌喘鐗╄濺 </td>  
                    </tr>  
                    <%  
                        Set productIdSet = products.keySet();  
                        Iterator it = productIdSet.iterator();  
                        int number = 1;
                        while (it.hasNext()) {  
                            String id = (String) it.next();  
                            Product product = (Product) products.get(id);  
                    %><tr>  
                        <td><%=number++%></td>  
                        <td><%=product.getName()%></td>  
                        <td><%=product.getDescription()%></td>  
                        <td><%=product.getPrice()%></td>  
                        <td><a href="Buy.jsp?id=<%=product.getId()%>&action=add" target="_blank" rel="external nofollow"  target="cart">鎴戣璐拱</a></td>  
                    </tr>  
                    <%  
                        }  
                    %>
            </table>  
            <p></p>
        </form>  
    </body>  
</html>

Buy.jsp

<%@ page language="java" import="java.util.*" pageEncoding="GB18030"%>  
<%@ page import="shopping.cart.*" %>
<%  
    Cart c = (Cart)session.getAttribute("cart");  
    if(c == null) {  
        c = new Cart();  
        session.setAttribute("cart", c);  
    }
    double totalPrice = c.getTotalPrice();
    request.setCharacterEncoding("GBK");  
    String action = request.getParameter("action");  
  
    Map products = (HashMap)session.getAttribute("products");  
  
    if(action != null && action.trim().equals("add")) {  
        String id = request.getParameter("id");  
        Product p = (Product)products.get(id);  
        CartItem ci = new CartItem();  
        ci.setProduct(p);  
        ci.setCount(1);  
        c.add(ci);  
    }  
  
    if(action != null && action.trim().equals("delete")) {  
        String id = request.getParameter("id");  
        c.deleteItemById(id);  
    }  
  
    if(action != null && action.trim().equals("update")) {  
        for(int i=0; i<c.getItems().size(); i++) {  
             CartItem ci = c.getItems().get(i);  
             int count = Integer.parseInt(request.getParameter("p" + ci.getProduct().getId()));  
            ci.setCount(count);  
        }  
    }  
 %>   
 
<%  
    String path = request.getContextPath();  
    String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";  
%>  

<%  
    List<CartItem> items = c.getItems();  
%>  
  
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">  
<html>  
    <head>  
    <meta http-equiv="Content-Type" content="text/html; charset=GB18030">  
        <title>璐墿杞?lt;/title>
    </head>  
    <body>
        <!-- c鐨勫?兼槸锛?lt;%=(c == null) %> items鐨勫?兼槸锛?lt;%=(items == null) %> -->  
        <form action="Buy.jsp" method="get">  
        <input type="hidden" name="action" value="update"/>  
        <table align="center" >  
            <tr>  
                <td>浜у搧ID</td>  
                <td>浜у搧鍚嶇О</td>  
                <td>璐拱鏁伴噺</td>  
                <td>鍗曚環</td>  
                <td>鎬諱環</td>  
                <td>澶勭悊</td>  
            </tr>  
            <%  
                for(Iterator<CartItem> it = items.iterator(); it.hasNext(); ) {  
                    CartItem ci = it.next();  
            %>  
            <tr>  
                <td><%=ci.getProduct().getId() %></td>  
                <td><%=ci.getProduct().getName() %></td>  
                <td>  
                    <input type="text" size=3 name="<%="p" + ci.getProduct().getId() %>" value="<%=ci.getCount() %>"   
                        慰nkeypress="if (event.keyCode < 45 || event.keyCode > 57) event.returnValue = false;"  
                            慰nchange="document.forms[0].submit()">                 
                </td>  
                <td><%=ci.getProduct().getPrice() %></td>  
                <td><%=ci.getProduct().getPrice()*ci.getCount() %></td>  
                <td> 
                <a href="Buy.jsp?action=delete&id=<%=ci.getProduct().getId() %>" target="_blank" rel="external nofollow" >鍒犻櫎</a>
                </td>  
            </tr>  
            <%  
                }  
            %>
            <tr>  
                <td colspan=3 align="right">鎵?鏈夊晢鍝佹?諱環鏍間負锛?lt;/td>  
                <td colspan=3><%=c.getTotalPrice() %></td>  
            </tr>
            <tr>  
             <!-- <td colspan=3>  
               <a href="javascript:document.forms[0].submit()" target="_blank" rel="external nofollow" >淇敼</a>   
               </td>  -->  
                <td colspan=6 align="right"><a href="" target="_blank" rel="external nofollow" >涓嬪崟</a></td>  
            </tr>  
        </table>  
    </form>  
    </body>  
</html>

涓嬮潰鏄噰鐢ㄥ悓鏍穝ession鏂規硶锛屼絾娴呮樉鏄撴噦鐨勪竴绉嶆柟寮忥細

鍦闆潃锛歨ttp://download.csdn.net/detail/qq_28306215/9702155

JSP+javabean實作購物車功能

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