实现网上购物系统的后台管理（增、删、改、查图书）。
2013-05-02 22:43
351 查看
实验描述：
（实验三的任务）用户网上注册，注册信息写入数据库。
（实验四的任务）用户登陆后，进入网上购物系统，选择书籍，加入购物车，购物完毕进入结账界面（可模拟一下，简单输出一些信息）；在用户购物的期间内，可随时查看购物车的状态，进入购物车后，也可返回再选择商品；在购物期间，用户也可以注销。
本次的任务：管理员以“admin”为用户名进行注册（或登录），对书籍进行后台管理（增、删、改
、查）。
问题：
sql=sql+"publisher='"+publisher+"‘ where bookname='"+name+"'";与
sql=sql+"publisher='"+publisher+"'"+" where bookname='"+name+"'";
区别很大，看似很相同，第一个不能运行，第二个oK
感受：
很多语句和一些简单的应用很不熟，犯了很多小白问题
练习太少了，
贴个后台代码：
jsp:页面
Backmanger.jsp
logIn.jsp
process.jsp
gaizheng.jsp
chaxun.jsp (水水滴）
backbean.
dao 里的
backconnect.java
servlet
zhengjia.jsp
jianshao.jsp
gaizheng.jsp
代码打包：
去我的资源里下吧
这个链接是城通网盘 的链接
（实验三的任务）用户网上注册，注册信息写入数据库。
（实验四的任务）用户登陆后，进入网上购物系统，选择书籍，加入购物车，购物完毕进入结账界面（可模拟一下，简单输出一些信息）；在用户购物的期间内，可随时查看购物车的状态，进入购物车后，也可返回再选择商品；在购物期间，用户也可以注销。
本次的任务：管理员以“admin”为用户名进行注册（或登录），对书籍进行后台管理（增、删、改
、查）。
问题：
sql=sql+"publisher='"+publisher+"‘ where bookname='"+name+"'";与
sql=sql+"publisher='"+publisher+"'"+" where bookname='"+name+"'";
区别很大，看似很相同，第一个不能运行，第二个oK
感受：
很多语句和一些简单的应用很不熟，犯了很多小白问题
练习太少了，
贴个后台代码：
jsp:页面
Backmanger.jsp
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<%
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>
<base href="<%=basePath%>">
<title>My JSP 'index.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">
<!--
<link rel="stylesheet" type="text/css" href="styles.css">
-->
</head>
<body>
<%request.setCharacterEncoding("utf-8");
response.setCharacterEncoding("utf-8"); %>
<form action="backLogin.jsp" method="post">
<table>
<tr><td colspan="2" align="center">后台管理登陆</td></tr>
<tr><td>数据库名称：</td><td><input type="text" name="pdatebasename"/></td></tr>
<tr><td>表的名字：</td><td><input type="text" name="ptable"/></td></tr>
<tr><td>用户名：</td><td><input type="text" name="puser"/></td></tr>
<tr><td>密码：</td><td><input type="password" name="pwd"/></td></tr>
<tr>
<td ><input type="submit" value=" 管理员登陆"/></td>
</tr>
</table>
</form>
</body>
</html>logIn.jsp
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<%@page import="dao.backConnect" %>
<%@ page import="bean.backConnectbean" %>
<%
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>
<base href="<%=basePath%>">
<title>My JSP 'backLogin.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">
<!--
<link rel="stylesheet" type="text/css" href="styles.css">
-->
</head>
<body>
<%request.setCharacterEncoding("utf-8");
response.setCharacterEncoding("utf-8"); %>
<jsp:useBean id="user1" class="bean.backConnectbean" scope="session"></jsp:useBean>
<jsp:setProperty property="*" name="user1"/>
<%
// System.out.println(user.getPdatebasename()+" "+user.getPuser()+" "+user.getPwd());
// String ps=request.getParameter("pwd");
boolean flag=(new backConnect()).getConn(user1.getPdatebasename(),user1.getPuser(),user1.getPwd());
System.out.println("flag 初始化成功");
if(flag)
{
response.sendRedirect("displayBook1.jsp");
}
else
{
response.sendRedirect("BackManger.jsp");
}
%>
</body>
</html>display<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<%@page import="dao.BookDao"%>
<%@page import="bean.BookBean"%>
<%
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>
<base href="<%=basePath%>">
<title>My JSP 'displayBooks.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">
<!--
<link rel="stylesheet" type="text/css" href="styles.css">
-->
</head>
<body>
<%request.setCharacterEncoding("utf-8");
response.setCharacterEncoding("utf-8"); %>
<%
%>
欢迎您 管理员，请选择相关操作
<form action="process.jsp" method="post">"
<table border="1">
<tr><td>请选择</td>
<td>书名</td>
<td>出版社</td>
<td>作者</td>
<td>价格</td>
<td>出版日期</td>
<td>库存数量</td>
</tr>
<%
BookDao bookDao=new BookDao();
ArrayList list=bookDao.selectAllBooks();
Iterator it=list.iterator();
while(it.hasNext())
{
BookBean book=(BookBean)it.next();
%>
<tr>
<td><input type="checkbox" name="bookid" value="<%=book.getBookid() %>"/> </td>
<td><%=book.getBookname() %></td>
<td><%=book.getPublisher() %></td>
<td><%=book.getAuthor() %></td>
<td><%=book.getPrice() %></td>
<td><%=book.getPublishDate() %></td>
<td><%=book.getCount() %></td>
</tr>
<%
}
%>
<tr>
<td>
<select name="flag">
<option value="增加" selected>增加</option>
<option value="减少">减少</option>
<option value="改正">改正</option>
<option value="查询">查询</option>
</select><br>
</inut>
</td>
</tr>
<tr><td colspan="7" align="center">
<input type="submit" value="提交"/>
</td></tr>
</table></form>
</body>
</html>process.jsp
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<%
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>
<base href="<%=basePath%>">
<title>My JSP 'process.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">
<!--
<link rel="stylesheet" type="text/css" href="styles.css">
-->
</head>
<body>
<%
request.setCharacterEncoding("utf-8");
response.setCharacterEncoding("utf-8");
%>
<%
String flag=request.getParameter("flag");
if(flag.equals("增加"))
{
response.sendRedirect("zhengjia.jsp");
}
else if(flag.equals("减少"))
{
response.sendRedirect("jianshao.jsp");
}else if(flag.equals("改正"))
{
response.sendRedirect("gaizheng.jsp");
}
else if(flag.equals("查询"))
{
response.sendRedirect("chaxun.jsp");
}
%>
</body>
</html>zhengjia.jsp<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<%
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>
<base href="<%=basePath%>">
<title>My JSP 'regist.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">
<!--
<link rel="stylesheet" type="text/css" href="styles.css">
-->
</head>
<body>
<%request.setCharacterEncoding("utf-8");
response.setCharacterEncoding("utf-8"); %>
<form action="zhengjiaservlet" method="get">
<table>
<tr><td colspan="2" align="center">要增加的内容</td></tr>
<tr><td>编号：</td><td><input type="text" name="bookid"/></td></tr>
<tr><td>书名：</td><td><input type="text" name="bookname"/></td></tr>
<tr><td>出版社：</td><td><input type="text" name="publisher"/></td></tr>
<tr><td>作者：</td><td><input type="text" name="author" />
<tr><td>价格：</td><td><input type="text" name="price"/></td></tr>
<tr><td>出版日期：</td><td><input type="text" name="publishDate"/></td></tr>
<tr><td>数量：</td><td><input type="text" name="count"/></td></tr>
<tr><td colspan="2" align="center"><input type="submit" value="提交"/></td></tr>
</table></form>
</body>
</html>jianshao.jsp<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<%
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>
<base href="<%=basePath%>">
<title>My JSP 'regist.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">
<!--
<link rel="stylesheet" type="text/css" href="styles.css">
-->
</head>
<body>
<%request.setCharacterEncoding("utf-8");
response.setCharacterEncoding("utf-8"); %>
<form action="jianshaoservlet" method="get">
<table>
<tr><td colspan="2" align="center">要删去的书名</td></tr>
<tr><td>书名：</td><td><input type="text" name="bookname"/></td></tr>
<tr><td colspan="2" align="center"><input type="submit" value="提交"/></td></tr>
</table></form>
</body>
</html>gaizheng.jsp
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<%
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>
<base href="<%=basePath%>">
<title>My JSP 'regist.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">
<!--
<link rel="stylesheet" type="text/css" href="styles.css">
-->
</head>
<body>
<%request.setCharacterEncoding("utf-8");
response.setCharacterEncoding("utf-8"); %>
<form action="gaizheng" method="get">
<table>
<tr><td colspan="2" align="center">要改正的书名及要修改的相关信息</td></tr>
<tr><td>书名：</td><td><input type="text" name="bookname"/></td></tr>
<tr><td>出版社：</td><td><input type="text" name="publisher"/></td></tr>
<tr><td>作者：</td><td><input type="text" name="author" />
<tr><td>价格：</td><td><input type="text" name="price"/></td></tr>
<tr><td>出版日期：</td><td><input type="text" name="publishDate"/></td></tr>
<tr><td>数量：</td><td><input type="text" name="count"/></td></tr>
<tr><td colspan="2" align="center"><input type="submit" value="提交"/></td></tr>
</table></form>
</body>
</html>chaxun.jsp (水水滴）
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<%@page import="dao.BookDao"%>
<%@page import="bean.BookBean"%>
<%
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>
<base href="<%=basePath%>">
<title>My JSP 'displayBooks.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">
<!--
<link rel="stylesheet" type="text/css" href="styles.css">
-->
</head>
<body>
<%request.setCharacterEncoding("utf-8");
response.setCharacterEncoding("utf-8"); %>
<%
%>
<p>书籍信息</p>
<form action="process.jsp" method="post">"
<table border="1">
<tr><td>编号</td>
<td>书名</td>
<td>出版社</td>
<td>作者</td>
<td>价格</td>
<td>出版日期</td>
<td>库存数量</td>
</tr>
<%
BookDao bookDao=new BookDao();
ArrayList list=bookDao.selectAllBooks();
Iterator it=list.iterator();
while(it.hasNext())
{
BookBean book=(BookBean)it.next();
%>
<tr>
<td><input type="checkbox" name="bookid" value="<%=book.getBookid() %>"/> </td>
<td><%=book.getBookname() %></td>
<td><%=book.getPublisher() %></td>
<td><%=book.getAuthor() %></td>
<td><%=book.getPrice() %></td>
<td><%=book.getPublishDate() %></td>
<td><%=book.getCount() %></td>
</tr>
<%
}
%>
<tr>
<td>
</inut>
</td>
</tr>
</td></tr>
</table></form>
</body>
</html>beanbackbean.
package dao;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;
public class backConnect {
public boolean getConn(String datebaseName,String user,String pwd)
{
try {
Class.forName("com.microsoft.sqlserver.jdbc.SQLServerDriver");
System.out.print(datebaseName+" "+user+" "+pwd);
String url="jdbc:sqlserver://127.0.0.1:1433;databaseName="+datebaseName;
Connection con;
con=DriverManager.getConnection(url,user,pwd);
System.out.print("连接成功");
return true;
} catch (SQLException e) {
// TODO Auto-generated catch block
System.out.print("连接失败一");
e.printStackTrace();
} catch (ClassNotFoundException e) {
// TODO Auto-generated catch block
System.out.print("连接失败二");
e.printStackTrace();
}
return false;
}
}dao 里的
backconnect.java
package bean;
public class backConnectbean {
private String pdatebasename="nothing";
private String ptable="nothing";
private String puser="nothing";
private String pwd="nothing";
public String getPdatebasename() {
return pdatebasename;
}
public void setPdatebasename(String datebaseName) {
this.pdatebasename = datebaseName;
}
public String getPtable() {
return ptable;
}
public void setPtable(String ptable) {
this.ptable = ptable;
}
public String getPuser() {
return puser;
}
public void setPuser(String puser) {
this.puser = puser;
}
public String getPwd() {
return pwd;
}
public void setPwd(String pwd) {
this.pwd = pwd;
}
}巨关键的bookdao.javapackage dao;
import dao.BaseDao;
import java.io.*;
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.ArrayList;
import bean.BookBean;
import java.sql.*;
public class BookDao {
Connection con=new BaseDao().getConn();
private PreparedStatement pstat;
String sql="";
public boolean Zhengjia(BookBean user)
{
sql = "insert into book values(?,?,?,?,?,?,?)";
try
{
pstat = con.prepareStatement(sql);
pstat.setString(1,user.getBookid());
pstat.setString(2,user.getBookname());
pstat.setString(3,user.getPublisher());
pstat.setString(4,user.getAuthor());
pstat.setString(5,user.getPrice());
pstat.setString(6,user.getPublishDate());
pstat.setInt(7,user.getCount());
pstat.executeUpdate();
pstat.close();
con.close();
return true;
}
catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return false;
}
public boolean jianshao(String name)
{
sql = "delete from book where bookname='"+name+"'";
try
{
Statement sql1;
sql1=con.createStatement();
sql1.executeUpdate(sql);
con.close();
return true;
}
catch (SQLException e) {
// TODO Auto-generated catch block
//e.printStackTrace();
}
return false;
}
public boolean gaizheng(String name,String publisher,String author,String price,String publishDate,int count)
{
if(true)
{
System.out.println(name+publisher+author+price+publishDate+count);
}
String sql = "update book set ";
String sql1 = "update book set ";
String sql2 = "update book set ";
String sql3 = "update book set ";
String sql4 = "update book set ";
if(publisher!=null)
{
sql=sql+"publisher='"+publisher+"'"+" where bookname='"+name+"'";
}
if(author!=null)
{
sql1+="author='"+author+"'"+" where bookname='"+name+"'";
}
if(price!=null)
{
sql2+="price='"+price+"'"+" where bookname='"+name+"'";
}
if(publishDate!=null)
{
sql3+="poublishDate='"+publishDate+"'"+" where bookname='"+name+"'";
}
if(count!=0 )
{
sql4+="count='"+count+"'"+" where bookname='"+name+"'";;
}
System.out.println(sql);
System.out.println("try 前");
try
{
Statement sql11;
sql11=con.createStatement();
sql11.executeUpdate(sql);
System.out.println("try 中");
sql11.executeUpdate(sql1);
sql11.executeUpdate(sql2);
sql11.executeUpdate(sql3);
sql11.executeUpdate(sql4);
con.close();
System.out.println("try 后");
return true;
}
catch (SQLException e) {
// TODO Auto-generated catch block
//e.printStackTrace();
}
return false;
}
public ArrayList selectAllBooks()
{
ArrayList<BookBean> list=new ArrayList();
String selectSql="select * from book";
try {
PreparedStatement pst=con.prepareStatement(selectSql);
ResultSet rs=pst.executeQuery();
while(rs.next())
{
BookBean book=new BookBean();
book.setBookid(rs.getString(1));
book.setBookname(rs.getString(2));
book.setPublisher(rs.getString(3));
book.setAuthor(rs.getString(4));
book.setPrice(rs.getString(5));
book.setPublishDate(rs.getString(6));
book.setCount(rs.getInt(7));
list.add(book);
}
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return list;
}
public String selectBookById(String bookId)
{
String bookName=null;
String selectSql="select bookname from book where bookid=?";
try {
PreparedStatement pst=con.prepareStatement(selectSql);
pst.setString(1, bookId);
ResultSet rs=pst.executeQuery();
if(rs.next())
{
bookName=rs.getString(1);
}
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return bookName;
}
}servlet
zhengjia.jsp
package servlet;
import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import dao.BookDao;
public class gaizheng extends HttpServlet {
/**
* Constructor of the object.
*/
public gaizheng() {
super();
}
/**
* Destruction of the servlet. <br>
*/
public void destroy() {
super.destroy(); // Just puts "destroy" string in log
// Put your code here
}
/**
* The doGet method of the servlet. <br>
*
* This method is called when a form has its tag value method equals to get.
*
* @param request the request send by the client to the server
* @param response the response send by the server to the client
* @throws ServletException if an error occurred
* @throws IOException if an error occurred
*/
public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
response.setContentType("text/html");
response.setCharacterEncoding("utf-8");
request.setCharacterEncoding("utf-8");
String bookname = new String(request.getParameter("bookname").getBytes("ISO8859_1"),"utf-8");
String publisher = new String(request.getParameter("publisher").getBytes("ISO8859_1"),"utf-8");
String author = new String(request.getParameter("author").getBytes("ISO8859_1"),"utf-8");
String price = new String(request.getParameter("price").getBytes("ISO8859_1"),"utf-8");
String publishDate = new String(request.getParameter("publishDate").getBytes("ISO8859_1"),"utf-8");
String count1 = new String(request.getParameter("count").getBytes("ISO8859_1"),"utf-8");
int count=Integer.parseInt(count1);
BookDao dao = new BookDao();
if(dao.gaizheng(bookname,publisher,author,price,publishDate,count))
{
response.setContentType("text/html");
PrintWriter out = response.getWriter();
out.println("<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.01 Transitional//EN\">");
out.println("<HTML>");
out.println(" <HEAD><TITLE>A Servlet</TITLE></HEAD>");
out.println(" <BODY>");
out.print(" Successful！！！ ");
out.println(" </BODY>");
out.println("</HTML>");
out.flush();
out.close();
}
else
{
response.setContentType("text/html");
PrintWriter out = response.getWriter();
out.println("<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.01 Transitional//EN\">");
out.println("<HTML>");
out.println(" <HEAD><TITLE>A Servlet</TITLE></HEAD>");
out.println(" <BODY>");
out.print(" Defeated!!! ");
out.println(" </BODY>");
out.println("</HTML>");
out.flush();
out.close();
}
}
/**
* The doPost method of the servlet. <br>
*
* This method is called when a form has its tag value method equals to post.
*
* @param request the request send by the client to the server
* @param response the response send by the server to the client
* @throws ServletException if an error occurred
* @throws IOException if an error occurred
*/
public void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
response.setContentType("text/html");
PrintWriter out = response.getWriter();
out
.println("<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.01 Transitional//EN\">");
out.println("<HTML>");
out.println(" <HEAD><TITLE>A Servlet</TITLE></HEAD>");
out.println(" <BODY>");
out.print(" This is ");
out.print(this.getClass());
out.println(", using the POST method");
out.println(" </BODY>");
out.println("</HTML>");
out.flush();
out.close();
}
/**
* Initialization of the servlet. <br>
*
* @throws ServletException if an error occurs
*/
public void init() throws ServletException {
// Put your code here
}
}jianshao.jsp
package servlet;
import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import dao.BookDao;
public class jianshaoservlet extends HttpServlet {
/**
* Constructor of the object.
*/
public jianshaoservlet() {
super();
}
/**
* Destruction of the servlet. <br>
*/
public void destroy() {
super.destroy(); // Just puts "destroy" string in log
// Put your code here
}
/**
* The doGet method of the servlet. <br>
*
* This method is called when a form has its tag value method equals to get.
*
* @param request the request send by the client to the server
* @param response the response send by the server to the client
* @throws ServletException if an error occurred
* @throws IOException if an error occurred
*/
public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
response.setContentType("text/html");
response.setCharacterEncoding("utf-8");
request.setCharacterEncoding("utf-8");
String bookname = new String(request.getParameter("bookname").getBytes("ISO8859_1"),"utf-8");
BookDao dao = new BookDao();
if(dao.jianshao(bookname))
{
response.setContentType("text/html");
PrintWriter out = response.getWriter();
out
.println("<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.01 Transitional//EN\">");
out.println("<HTML>");
out.println(" <HEAD><TITLE>A Servlet</TITLE></HEAD>");
out.println(" <BODY>");
out.print(" Successful！！！ ");
out.println(" </BODY>");
out.println("</HTML>");
out.flush();
out.close();
}
else
{
response.setContentType("text/html");
PrintWriter out = response.getWriter();
out
.println("<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.01 Transitional//EN\">");
out.println("<HTML>");
out.println(" <HEAD><TITLE>A Servlet</TITLE></HEAD>");
out.println(" <BODY>");
out.print(" Defeated!!! ");
out.println(" </BODY>");
out.println("</HTML>");
out.flush();
out.close();
}
}
/**
* The doPost method of the servlet. <br>
*
* This method is called when a form has its tag value method equals to post.
*
* @param request the request send by the client to the server
* @param response the response send by the server to the client
* @throws ServletException if an error occurred
* @throws IOException if an error occurred
*/
public void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
response.setContentType("text/html");
PrintWriter out = response.getWriter();
out
.println("<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.01 Transitional//EN\">");
out.println("<HTML>");
out.println(" <HEAD><TITLE>A Servlet</TITLE></HEAD>");
out.println(" <BODY>");
out.print(" This is ");
out.print(this.getClass());
out.println(", using the POST method");
out.println(" </BODY>");
out.println("</HTML>");
out.flush();
out.close();
}
/**
* Initialization of the servlet. <br>
*
* @throws ServletException if an error occurs
*/
public void init() throws ServletException {
// Put your code here
}
}gaizheng.jsp
package servlet;
import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import dao.BookDao;
public class gaizheng extends HttpServlet {
/**
* Constructor of the object.
*/
public gaizheng() {
super();
}
/**
* Destruction of the servlet. <br>
*/
public void destroy() {
super.destroy(); // Just puts "destroy" string in log
// Put your code here
}
/**
* The doGet method of the servlet. <br>
*
* This method is called when a form has its tag value method equals to get.
*
* @param request the request send by the client to the server
* @param response the response send by the server to the client
* @throws ServletException if an error occurred
* @throws IOException if an error occurred
*/
public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
response.setContentType("text/html");
response.setCharacterEncoding("utf-8");
request.setCharacterEncoding("utf-8");
String bookname = new String(request.getParameter("bookname").getBytes("ISO8859_1"),"utf-8");
String publisher = new String(request.getParameter("publisher").getBytes("ISO8859_1"),"utf-8");
String author = new String(request.getParameter("author").getBytes("ISO8859_1"),"utf-8");
String price = new String(request.getParameter("price").getBytes("ISO8859_1"),"utf-8");
String publishDate = new String(request.getParameter("publishDate").getBytes("ISO8859_1"),"utf-8");
String count1 = new String(request.getParameter("count").getBytes("ISO8859_1"),"utf-8");
int count=Integer.parseInt(count1);
BookDao dao = new BookDao();
if(dao.gaizheng(bookname,publisher,author,price,publishDate,count))
{
response.setContentType("text/html");
PrintWriter out = response.getWriter();
out.println("<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.01 Transitional//EN\">");
out.println("<HTML>");
out.println(" <HEAD><TITLE>A Servlet</TITLE></HEAD>");
out.println(" <BODY>");
out.print(" Successful！！！ ");
out.println(" </BODY>");
out.println("</HTML>");
out.flush();
out.close();
}
else
{
response.setContentType("text/html");
PrintWriter out = response.getWriter();
out.println("<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.01 Transitional//EN\">");
out.println("<HTML>");
out.println(" <HEAD><TITLE>A Servlet</TITLE></HEAD>");
out.println(" <BODY>");
out.print(" Defeated!!! ");
out.println(" </BODY>");
out.println("</HTML>");
out.flush();
out.close();
}
}
/**
* The doPost method of the servlet. <br>
*
* This method is called when a form has its tag value method equals to post.
*
* @param request the request send by the client to the server
* @param response the response send by the server to the client
* @throws ServletException if an error occurred
* @throws IOException if an error occurred
*/
public void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
response.setContentType("text/html");
PrintWriter out = response.getWriter();
out
.println("<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.01 Transitional//EN\">");
out.println("<HTML>");
out.println(" <HEAD><TITLE>A Servlet</TITLE></HEAD>");
out.println(" <BODY>");
out.print(" This is ");
out.print(this.getClass());
out.println(", using the POST method");
out.println(" </BODY>");
out.println("</HTML>");
out.flush();
out.close();
}
/**
* Initialization of the servlet. <br>
*
* @throws ServletException if an error occurs
*/
public void init() throws ServletException {
// Put your code here
}
}代码打包：
去我的资源里下吧
这个链接是城通网盘 的链接
http://home.400gb.com/mydisk.php?item=files&action=index&folder_id=1213171
内容来自用户分享和网络整理，不保证内容的准确性，如有侵权内容，可联系管理员处理 
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