jsp写的简单购书网站

其他 2019-06-23 18:21:11 阅读次数: 0

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监听器：

package com.cjq.servlet;

import javax.servlet.http.HttpSessionEvent;
import javax.servlet.http.HttpSessionListener;

/**
 * Application Lifecycle Listener implementation class SessionListener
 *
 */
public class SessionListener implements HttpSessionListener {
	
	protected static int count = 0;
	

	/**
     * @see HttpSessionListener#sessionCreated(HttpSessionEvent)
     */
    public void sessionCreated(HttpSessionEvent arg0) {
    	System.out.println(count);
    	count++;
    }

	/**
     * @see HttpSessionListener#sessionDestroyed(HttpSessionEvent)
     */
    public void sessionDestroyed(HttpSessionEvent arg0) {
    	System.out.println(count);
    	if(count>0) count--;
    }
    
    public static int getCount(){
    	return count;
    }
	
}
web.xml配置如下：
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" id="WebApp_ID" version="2.5">
  <display-name>NetWorDemo</display-name>
  <welcome-file-list>
    <welcome-file>UI/login.html</welcome-file>
  </welcome-file-list>
  <listener>
    <listener-class>com.cjq.servlet.SessionListener</listener-class>
  </listener>
</web-app>


 

Book.java:
package com.cjq.book;

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;

import sun.jdbc.odbc.JdbcOdbcDriver;

public class Book {
	String sDBDriver = "sun.jdbc.odbc.JdbcOdbcDriver";
	String sConnStr = "jdbc:odbc:book";
	Connection conn = null;
	ResultSet rs = null;
	public Book(){
		try{
			Class.forName(sDBDriver);
		}catch(ClassNotFoundException e){
			e.printStackTrace();
		}
	}
	
	public ResultSet executeQuery(String sql){
		rs = null;
		try{
			conn = DriverManager.getConnection(sConnStr);
			Statement stmt = conn.createStatement();
			stmt = conn.createStatement(ResultSet.TYPE_SCROLL_INSENSITIVE, ResultSet.CONCUR_READ_ONLY);
			rs = stmt.executeQuery(sql);
		}catch(SQLException ex){
			ex.printStackTrace();
		}
		return rs;
	}

}



login.html:
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Insert title here</title>
</head>
<body>
<form method="post" action="UI/login_confirm.jsp">
	<tr>
		<td>
			登录名:<input name="login" size="20"><br>
		</td>
	</tr><br>
	<tr>
		<td>
			密码:<input type="password" name="password" size="20"><br>
		</td>
	</tr><br>
		<td>
			<input type="submit" size="4" value="登录"><br>
		</td>
	<br>
	
</form>

</body>
</html>


 
login_confirm.jsp:
<%@page import="java.sql.ResultSet"%>
<%@ page language="java" contentType="text/html; charset=GBK"
    pageEncoding="GBK"%>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=GBK">
<title>Insert title here</title>
</head>
<body>
<jsp:useBean id="users" scope="page" class="com.cjq.book.Book"/>
<%
	String name = request.getParameter("login");
	name = new String(name.getBytes("UTF-8"));
	String pwd = request.getParameter("password");
	pwd = new String(pwd.getBytes("UTF-8"));
	String sql = "select * from customer where logname='"+name+"' and password='"+pwd+"'";
	ResultSet rs = users.executeQuery(sql);
	if(rs.next()){
		rs.close();
		session.putValue("username", name);
		%>
		<jsp:forward page="browse.jsp"/>
		<%
	}else{
		rs.close();
		%>
		<jsp:forward page="login.html"/>
		<%
		
	}
%>



</body>
</html>


 
browse.jsp:
<%@page import="com.cjq.servlet.SessionListener"%>
<%@page import="java.sql.ResultSet"%>
<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<%
	if(session.getAttribute("username")==null){
		response.sendRedirect("login.html");
	}
	%>
	<jsp:useBean id = "mybook" scope="page" class="com.cjq.book.Book"/>

<%

	int pageSize = 8;
	int showPage = 1;
	int rowCount = 0;
	int pageCount = 0;
	ResultSet rs = mybook.executeQuery("select * from book");
	rs.last();
	rowCount = rs.getRow();
	rs.beforeFirst();
	
	pageCount = ((rowCount%pageSize)==0?(rowCount/pageSize):(rowCount/pageSize)+1);
	
%>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
</head>
<body>
<center><p>在线人数:<%= SessionListener.getCount() %></center>
<br>
<hr>
<br>
<center>
<%
	String toPage = request.getParameter("toPage");
	if(toPage!=null){
		showPage = Integer.parseInt(toPage);
		if(showPage>pageCount){
			showPage=pageCount;
		}else if(showPage<=0){
			showPage=1;
		}
	}
	rs.absolute((showPage-1)*pageSize+1);
%>
<h3>
当前在第<font size="4" color="red"><%= showPage %></font>页，共
<font size="4" color="red"><%= pageCount %></font>页
</h3>
<br>
<table border="1" width="100%">
	<tr bgcolor="#FFCCCC">
		<td width="33%">书名</td>
		<td width="33%">作者</td>
		<td width="10%">价格(元)</td>
		<td width="24%">购书</td>
	</tr>
	<%
		for(int i=(showPage-1)*pageSize+1;i<=rowCount;i++){
			%>
			<tr bgcolor="#CCFFCC">
				<td width="33%"><%=rs.getString("name") %></td>
				<td width="33"><%=rs.getString("author") %></td>
				<td width="10%"><%=rs.getString("price") %></td>
				<td width="24%"><a href="cart.jsp?book_id=<%=rs.getInt("id") %>">选购此书</a></td>
			</tr>
			<%
			rs.next();
			if(i==pageSize){
				break;
			}
		}
		rs.close();
	%>
</table>
<table>
	<tr valign="baseline" align="center">
	<%
		if(showPage!=1){
			%>
			<td width="150"><a href="browse.jsp?toPage=<%=1 %>">到第一页</a></td>
			<td width="150"><a href="browse.jsp?toPage=<%=showPage-1 %>">到上一页</a></td>
			<%
		}
		if(showPage!=pageCount){
			%>
			<td width="150"><a href="browse.jsp?toPage=<%=showPage+1 %>">到下一页</a></td>
			<td width="150"><a href="browse.jsp?toPage=<%=pageCount %>">到最后一页</a></td>
			<%
		}
	%>
	<td width="150">
	<form action="browse.jsp" method="post">
	到
	<input type="text" name="toPage" style="height:25px;width:40px" value="<%=showPage %>">页
	</form>
	</td>
	</tr>
</table>
</center>

</body>
</html>


 
cart.jsp:
<%@page import="java.sql.ResultSet"%>
<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<%
	if(session.getAttribute("username")==null){
		response.sendRedirect("login.html");
	}
%>
<jsp:useBean id="cart" scope="page" class="com.cjq.book.Book"/>
<%
	String book_id=request.getParameter("book_id");
	String sql = "select id from orders where book_id="+book_id+" and user_name='"+session.getAttribute("username")+"'";
	ResultSet rs = cart.executeQuery(sql);
	int rowscount=0;
	try{
		while(rs.next()){
			rowscount++;
		}
	}catch(Exception e){
		out.println(e.getMessage());
	}
	if(rowscount==0){
		String sqlBook1 = "select * from book where id="+book_id;
		ResultSet rsBook1 = cart.executeQuery(sqlBook1);
		while(rsBook1.next()){
			String sqlCart="insert into orders (user_name,book_id,book_number,goods_price)"+
							"values('"+session.getAttribute("username")+"','"+book_id+"','1',"+rsBook1.getDouble("price")+")";
			cart.executeQuery(sqlCart);
		}
	}else{
		String sqlBook2="select * from book where id="+book_id;
		ResultSet rsBook2=cart.executeQuery(sqlBook2);
		while(rsBook2.next()){
			String sqlAdd="update orders set book_number=book_number+1,goods_price="+rsBook2.getDouble("price")+" where book_id="+book_id+" and user_name='"+session.getAttribute("username")+"'";
			cart.executeQuery(sqlAdd);
		}
	}
	response.sendRedirect("shopcart.jsp");
%>


shopcart.jsp:

<%@page import="java.sql.ResultSet"%>
<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<jsp:useBean id="workM" scope="page" class="com.cjq.book.Book"/>
<%
	if(session.getAttribute("username")==null){
		response.sendRedirect("login.html");
	}
%>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
</head>
<body bgcolor="#FFFFFF">
<div align="center">
	<table width="100%" border="0" bgcolor="#CCCCFF">
		<tr>
			<td>
			<div align="center">
			<b><font color="FF0000">购书清单</font></b>
			</div>
			</td>
		</tr>
	</table>
	<form name="form1" method="post" action="order.jsp">
		<p>您已选购以下书籍:</p>
		<table width="100%" border="0" align="center">
			<tr bgcolor="#FFCCCC">
			<td width="15%">
				<div align="center"><font color="#0000FF">购买数量</font></div>
			</td>
			<td width="56%">
				<div align="center"><font color="#0000FF">书名</font></div>
			</td>
			<td width="13%">
				<div align="center"><font color="#0000FF">单价(元)</font></div>
			</td>
			<td width="16%">
				<div align="center"><font color="#0000FF">总价格(元)</font></div>
			</td>
			</tr>
			<%
			double g_price,total_price;
			g_price=0;
			total_price=0;
			
			String sqlList="select * from orders where user_name='"+session.getAttribute("username")+"'";
			ResultSet rsList = workM.executeQuery(sqlList);
			rsList.beforeFirst();
			try{
				while(rsList.next()){
					int b_num = rsList.getInt("book_number");
					%>
					<tr bgcolor="#CCFFCC">
					<td width="15%">
					<div align="center"><font color="#0000FF"><%=b_num %>
					<input type="hidden" name="book_number" size="4" value="<%=b_num %>">
					</font></div>
					</td>
					<%
						String sqlBook="select * from book where id="+rsList.getInt("book_id");
						ResultSet rsBook = workM.executeQuery(sqlBook);
						while(rsBook.next()){
							%>
							<td width="56%">
							<div align="center"><font color="#0000FF"><%=rsBook.getString("name") %></font></div>
							</td>
							<td width="13%">
							<%
							double price = rsBook.getDouble("price");
							%>
							<div align="center"><font color="#0000FF">¥<%=price %></font></div>
							</td>
							<td width="16%">
							<div align="center"><font color="#0000FF">¥<%=(float)price*b_num %></font></div>
							</td>
							<%
							g_price=g_price+(double)price*b_num;
						}
					%>
					</tr>
					<%
				}
			}catch(Exception e){
				out.println(e);
			}
			%>
			<tr bgcolor="#CCCCFF">
				<td colspan="3">
				<div align="center"><font color="#0000FF">货物价格</font></div>
				</td>
				<td width="16%">
				<div align="center"><font color="#0000FF">¥<%=(float)g_price %></font></div>
				</td>
			</tr>
			<tr>
				<td height="18" colspan="3" bgcolor="#CCCC99">
				<div align="center"><font color="#0000FF">运输费用</font></div>
				</td>
				<td height="18" width="16%" bgcolor="#CCCC99">
				<div align="center"><font color="#0000FF">¥5.00</font></div>
				</td>
			</tr>
			<tr>
				<td height="18" colspan="3" bgcolor="#CCCC99">
				<div align="center"><font color="#0000FF">总费用</font></div>
				</td>
				<td height="18" width="16%" bgcolor="#CCCC99">
				<div align="center"><font color="#0000FF">¥<%=(float)g_price+5 %></font></div>
				</td>
			</tr>
			<tr align="center">
				<td colspan="4">
					<a href="browse.jsp">继续购书</a>
					<input type="submit" name="Submit2" value="填写订单"/>
				</td>
			</tr>
		</table>
	</form>
	<p> </p>
</div>

</body>
</html>

submit_order.jsp: 

<%@page import="java.sql.ResultSet"%>
<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<jsp:useBean id="workM" scope="page" class="com.cjq.book.Book"/>
<%
	if(session.getAttribute("username")==null){
		response.sendRedirect("login.html");
	}
%>
<%
	String tel = request.getParameter("address");
	tel = new String(tel.getBytes("UTF-8"));
	String address = request.getParameter("tel");
	address = new String(address.getBytes("UTF-8"));
	String sqlinsert = "update order set user__address='"+address+"',user_tel='"+tel+"' where user_name='"+session.getAttribute("username")+"'";
	workM.executeQuery(sqlinsert);
%>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
</head>
<body bgcolor="#FFFFFF">
<div align="center">
	<b><font color="Fucbsia">订单确认</font></b>
	<table width="100%" border="1">
		<tr bgcolor="#9999FF">
		<td colspan="2">
			<div align="center"><b>订单信息</b></div>
		</td>
		</tr>
		<tr>
			<td width="12%" bgcolor="#FFCCCC">姓名:</td>
			<td width="88%" bgcolor="#CCFFCC"><%=session.getAttribute("username") %></td>
		</tr>
		<tr>
			<td width="12%" bgcolor="#FFCCCC">住址:</td>
			<td width="88%" bgcolor="#CCFFCC"><%=address %></td>
		</tr>
		<tr>
			<td width="12%" bgcolor="#FFCCCC">电话:</td>
			<td width="88%" bgcolor="#CCFFCC"><%=tel %></td>
		</tr>
	</table>
	<p>您选购了以下书籍:</p>
	<table width="100%" border="0" align="center">
		<tr bgcolor="#FFCCCC">
			<td width="15%">
				<div align="center"><font color="#0000FF">购买数量</font></div>
			</td>
			<td width="56%">
				<div align="center"><font color="#0000FF">书名</font></div>
			</td>
			<td width="13%">
				<div align="center"><font color="#0000FF">单价(元)</font></div>
			</td>
			<td width="16%">
				<div align="center"><font color="#0000FF">总价格(元)</font></div>
			</td>
		</tr>
		<%
			double g_price=0,total_price=0;
			String sqlList = "select * from orders where user_name='"+session.getAttribute("username")+"'";
			ResultSet rsList = workM.executeQuery(sqlList);
			try{
				while(rsList.next()){
					int b_num = rsList.getInt("book_number");
					%>
					<tr bgcolor="#CCFFCC">
						<td width="15%">
							<div align="center">
							<font color="#0000FF">
							<%=b_num %>
							<input type="hidden" name="book_number" size="4" value="<%=b_num %>"/>
							</font>
							</div>
						</td>
						<%
							String sqlBook="select * from book where id="+rsList.getInt("book_id");
							ResultSet rsBook=workM.executeQuery(sqlBook);
							while(rsBook.next()){
								%>
								<td width="56%">
								<div align="center"><font color="#0000FF"><%=rsBook.getString("name") %></font></div>
								</td>
								<td width="13">
								<%
								double price = rsBook.getDouble("price");
								%>
								<div align="center"><font color="#0000FF">¥<%=price %></font></div>
								</td>
								<td width="16%">
								<div align="center"><font color="#0000FF">¥<%=(double)price*b_num %></font></div>
								</td>
								<%
								g_price=price+(double)price*b_num;
							}
						%>
					</tr>
					<%
				}
			}catch(Exception e){
				
			}
		%>
		<tr bgcolor="#CCCCFF">
			<td colspan="3">
			<div align="center"><font color="#0000FF">货物价格</font></div>
			</td>
			<td width="16%">
			<div align="center"><font color="#0000FF">¥<%=(float)g_price %></font></div>
			</td>
		</tr>
		<tr bgcolor="#CCCCFF">
			<td colspan="3">
			<div align="center"><font color="#0000FF">运输费用</font></div>
			</td>
			<td width="16%">
			<div align="center"><font color="#0000FF">¥5.00</font></div>
			</td>
		</tr>
		<tr bgcolor="#CCCCFF">
			<td colspan="3">
			<div align="center"><font color="#0000FF">总费用</font></div>
			</td>
			<td width="16%">
			<div align="center"><font color="#FF0000">¥<%=(float)g_price+5 %></font></div>
			</td>
		</tr>
		<tr align="center">
		<td colspan="4"></td>
		</tr>
	</table>
</div>

</body>
</html>





转载于:https://my.oschina.net/u/2552902/blog/543930

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