标签:int att .com function public other nan cond war
一、cart.jsp页面
<%@ page language="java" contentType="text/html; charset=utf-8" pageEncoding="utf-8"%> <%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %> <!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=utf-8"> <base href="http://${pageContext.request.serverName }:${pageContext.request.serverPort }${pageContext.request.contextPath }/" /> <title>Insert title here</title> <script type="text/javascript" src="script/jquery-1.7.2.js"></script> <script type="text/javascript"> $(function(){ //★给全部删除链接加入点击事件 $(".delete").click(function(){ if(!window.confirm("你确定要删除该购物项吗?")){ return false; //不让链接提交 } }); //给全部显示书的数量的输入框加入失去焦点的事件 $(".count").blur(function(){ var count =this.value;//得到输入框中的数值 if(isNaN(count)){ count=1; } count=count*1;//→转为number类型 if(count<=0){ count=1; } var bookId=this.id;//this代表了当前的输入框中的内容 //在这里须要在其变化之前保存下来以便于在function中使用 var inputEle=this; //它是一个dom对象 //window.location.href = "${pageContext.request.contextPath}/client/CartServlet?method=update&count="+count+"&bookId="+bookId; //★改动购物项图书数量的Ajax处理★ 这个时候须要发送Ajax请求 var path="client/CartServlet"; //上面加了base标签 var params={method:"update",count:count,bookId:bookId}; //data的数据类型{count:2,itemPrice:20,totalCount:5,totalPrice:50} var success=function(data){//→须要更新四处 //得到总数量 $("#totalCount").html(data.totalCount); //得到总价 $("#totalPrice").html(data.totalPrice); //更新购物项中的图书数量 inputEle.value=data.count;//将数据放进去 //得到小计 $(inputEle).parent().parent().find(".itemPrice").html(data.itemPrice); } $.post(path,params,success,"json"); }); //给<button>+</button>加入点击事件 $(".increase").click(function(){ //得到 数量首先,先找button的父元素,再找子元素 var $countEle=$(this).parent().find("input"); var count=$countEle.val();//得到文本框中的值 count=count*1+1;//转为number类型后再做运算\ //获取书的id var bookId=$countEle.attr("id"); //如今改为发送Ajax请求 var path="client/CartServlet"; var params={method:"update",count:count,bookId:bookId}; var success=function(data){ $("#totalCount").html(data.totalCount); $("#totalPrice").html(data.totalPrice); //更新书的数量 $countEle.val(data.count); //得到小计 $countEle.parents("tr").find(".itemPrice").html(data.itemPrice); }; $.post(path,params,success,"json"); }); //给<button>-</button>加入点击事件 $(".decrease").click(function(){ //得到数量 var $countEle = $(this).parent().find("input"); var count = $countEle.val();//链式调用 count = count*1-1; if(count<=1){ count=1; } //书的id var bookId = $countEle.attr("id"); //请求 //window.location.href = "${pageContext.request.contextPath}/client/CartServlet?method=update&count="+count+"&bookId="+bookId; //改为Ajax请求。。。。 var path="client/CartServlet"; var params={method:"update",count:count,bookId:bookId}; var success=function(data){ $("#totalCount").html(data.totalCount); $("#totalPrice").html(data.totalPrice); //更新书的数量 $countEle.val(data.count); //找当前行的小计 $countEle.parents("tr").find(".itemPrice").html(data.itemPrice); }; $.post(path,params,success,"json"); }); }); </script> </head> <body> <center> <h2>我的购物车</h2> <c:choose> <c:when test="${empty CART || empty CART.map }"> 购物车里面还没有书,马上去<a href="client/BookClientServlet?
method=getPageInCondition">购物</a> </c:when> <c:otherwise> <table border="1" cellpadding="10" cellspacing="0"> <tr> <td>书名</td> <td>单位价格</td> <td>数量</td> <td>小计</td> <td>操作</td> </tr> <c:forEach items="${CART.map }" var="entry"> <tr> <td>${entry.value.book.bookName}</td> <td>${entry.value.book.price}</td> <td> <button class="decrease" <%-- ${entry.value.count<=1 ?
‘disabled="false"‘ : ‘‘} --%>>-</button> <input id="${entry.key}" class="count" type="text" value="${entry.value.count}" style="width: 30px;"/> <button class="increase">+</button> </td> <td ><span class="itemPrice">${entry.value.itemPrice}</span></td> <td><a class="delete" href="client/CartServlet?method=delete&bookid=${entry.key}">删除</a></td> </tr> </c:forEach> <tr> <td><a id="clear" href="client/CartServlet?method=clear" >清空购物车</a></td> <td><a href="client/BookClientServlet?method=getPageInCondition">继续购物</a></td> <td>共<span id="totalCount">${CART.totalCount }</span>本书</td> <td>总价:<span id="totalPrice">${CART.totalPrice }</span>元</td> <td><a href="client/OrderServlet?method=listAllAddress">去结算</a></td> </tr> </table> </c:otherwise> </c:choose> </center> </body> </html>
package com.atguigu.bookstore.servlet.client; import com.atguigu.bookstore.bean.Book; import com.atguigu.bookstore.fun.Cart; import com.atguigu.bookstore.service.impl.BookServiceImpl; import com.atguigu.bookstore.service.impl.CartServiceImpl; import com.atguigu.bookstore.service.inter.BookService; import com.atguigu.bookstore.service.inter.CartService; import com.atguigu.bookstore.servlet.BaseServlet; import com.atguigu.bookstore.utils.WebUtils; import com.google.gson.Gson; import java.io.IOException; import java.util.HashMap; import java.util.Map; import javax.servlet.ServletException; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; public class CartServlet extends BaseServlet { private static final long serialVersionUID = 1L; CartService cartService=new CartServiceImpl(); BookService bookService=new BookServiceImpl(); protected void add(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { System.out.println("add...."); String bookid = request.getParameter("bookid"); Book book = bookService.getBookById(bookid); Cart cart = WebUtils.getCart(request); cartService.add(book, cart); //要得到这种数据{"bookName":"java", "totalCount": 2} 怎么得? String bookName = book.getBookName(); int totalCount = cart.getTotalCount(); //使用Gson能够得到以上类型的数据,可是须要一个源,这个仅仅有map和 //src是一个一般对象或map对象。在这里仅仅能用map对象。由于假设是一般对象,所须要一个类中包括不了这2种属性,还得又一次定义类,挺麻烦的 //而src是map对象时就不须要在又一次定义类了, Map<String, Object>map=new HashMap<String, Object>(); map.put("bookName", bookName); //取数据的时候是data.bookName; map.put("totalCount", totalCount); String jsonStr=new Gson().toJson(map); response.setContentType("text/json;charset=utf-8"); response.getWriter().write(jsonStr); } protected void delete(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { System.out.println("delete..."); String bookid = request.getParameter("bookid"); Cart cart = WebUtils.getCart(request); cartService.deleteItem(Integer.parseInt(bookid), cart); WebUtils.myForward(request, response, "/client/book/cart.jsp"); } protected void update(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { System.out.println("update...."); String count = request.getParameter("count"); String bookId = request.getParameter("bookId"); Map<String, Object>map=cartService.updateCount(Integer.parseInt(bookId), Integer.parseInt(count), WebUtils.getCart(request)); // WebUtils.myForward(request, response, "/client/book/cart.jsp"); //不用这种方式了 //要返回的数据类型:{count:2,itemPrice:20,totalCount:5,totalPrice:50},那么怎样得到呢?能够更改updateCount方法,使其返回一个map集合 String json = new Gson().toJson(map); response.setContentType("text/json;charset=utf-8"); response.getWriter().write(json); } protected void clear(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { System.out.println("clear...."); cartService.clear(WebUtils.getCart(request)); WebUtils.myForward(request, response, "/client/book/cart.jsp"); } }
<span style="white-space:pre"> </span>@Override public Map<String, Object> updateCount(int BookId, int count, Cart cart) { Map<String, Object>map=new HashMap<String, Object>(); CartItem cartItem = cart.getMap().get(BookId); cartItem.setCount(count); //{count:2,itemPrice:20,totalCount:5,totalPrice:50}, map.put("count", count); map.put("itemPrice", cartItem.getItemPrice()); map.put("totalCount", cart.getTotalCount()); map.put("totalPrice", cart.getTotalPrice()); return map; }
标签:int att .com function public other nan cond war
原文地址:http://www.cnblogs.com/cynchanpin/p/6971335.html