简单购物车和登录界面的java程序

CartBean.java

GoodsBean.java package bean;

package bean; import java.util.ArrayList;

public class GoodsBean { import java.util.Iterator;

String id; public class CartBean {

String name; ArrayList items;

int price; public CartBean(){

int count; this.items=new ArrayList();

public GoodsBean(){} }

public GoodsBean(String id,String name,int public void addItem(GoodsBean item){

price,int count){ items.add(item);

this.id=id; }

...... public ArrayList getItems(){

} return this.items;

public String getId() { }

return id;} public int getTotalPrice(){

public void setId(String id) { int total=0;

this.id = id;} Iterator it=items.iterator();

...... while(it.hasNext()){

} GoodsBean item=(GoodsBean)it.next();

total=total+item.getPrice()*item.count;

} return total; } }

CartServlet.java package servlet;

import java.io.IOException; import javax.servlet.*; import javax.servlet.http.*;

public class CartServlet extends HttpServlet { public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { String id=request.getParameter(\ String name=request.getParameter(\ int price=Integer.parseInt(request.getParameter(\ int count=Integer.parseInt(request.getParameter(\ bean.GoodsBean item=new bean.GoodsBean(id,name,price,count); bean.CartBean cb=(bean.CartBean)request.getSession().getAttribute(\ if(cb==null) cb=new bean.CartBean(); cb.addItem(item); request.getSession().setAttribute(\ response.sendRedirect(\ } public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { doGet(request,response); } }

index.jsp

<%@ page contentType=\ %>

......商品名称、商品单价、购买数量、购买操作

CartBean cb=(CartBean)session.getAttribute(\ ......002.003.004

if(cb!=null){

ArrayList items=cb.getItems();

for(Iterator it=items.iterator();it.hasNext();){

GoodsBean item=(GoodsBean)it.next();

out.println(\商品序号\

out.println(\商品名称\

out.println(\商品价格\

out.println(\商品数量\

out.println(\

}

out.println(\商品总价\

}else{

out.println(\购物车没有商品\

}

%>

UserCheckBean.java

UserBean.java package bean;

package bean; public class UserCheckBean {

public class UserBean { protected UserBean user;

private String name; public UserCheckBean() {}

private String pwd; public UserCheckBean(UserBean user) {

public String getName() { this.user = user;}

return name;} public UserBean getUser() {

public void setName(String name) { return user;}

this.name = name;} public void setUser(UserBean user) {

public String getPwd() { this.user = user;}

return pwd;} public boolean validate(){

public void setPwd(String pwd) { String name=user.getName();

this.pwd = pwd;} String pwd=user.getPwd();

} if(\

return true; }else{ return false;} } }

ControllerServlet.java package servlet; import java.io.*;

import javax.servlet.*; import javax.servlet.http.*; import bean.*;

public class ControllerServlet extends HttpServlet { public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { request.setCharacterEncoding(\ response.setContentType(\ UserBean user=new UserBean(); user.setName(request.getParameter(\ user.setPwd(request.getParameter(\ UserCheckBean uc=new UserCheckBean(user); RequestDispatcher rd; if(uc.validate()){ HttpSession session=request.getSession(); session.setAttribute(\ rd=request.getRequestDispatcher(\ rd.forward(request, response); }else{ rd=request.getRequestDispatcher(\ rd.forward(request, response);} } public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { doGet(request,response);} }

loginer.jsp

<%@ page language=\用户名或密码错误，请\

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