Userlogin代码 /*
Document : UserLogin
Created on : 2010-10-9, 21:03:15
Author : guzhihao
Faction :一个具体实现注册方法的Bean */
package Servlet1;
import java.sql.*;
public class UserLogin {
public boolean login(User user){
Connection conn=null;
PreparedStatement ps=null;
try{
Class.forName("com.mysql.jdbc.Driver");
conn=DriverManager.getConnection("jdbc:mysql://localhost:3306/cars","root","1232323");
String sql=
"insert into user(uname,upass)values(?,?)";
ps=conn.prepareStatement(sql);
ps.setString(1,user.getUname());
ps.setString(2,user.getUpass());
int mun=ps.executeUpdate();
}catch(Exception e){
e.printStackTrace();
}finally{
try{
ps.close();
conn.close();
}catch(SQLException e){
e.printStackTrace();
}
}
return true;
}
}
Userservlet代码
/*
Document : UserServlet
Created on : 2010-10-9, 21:03:15
Author : guzhihao
Faction :用于实现后台调用分配的Servlet
*/
package Servlet1;
import java.io.IOException;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
public class UserServlet extends HttpServlet {
private UserLand Land=new UserLand();
private UserLogin login=new UserLogin();
public void doGet(HttpServletRequest request,HttpServletResponse response)
throws ServletException,IOException{
}
public void doPost(HttpServletRequest request,HttpServletResponse response)
throws ServletException,IOException{
request.setCharacterEncoding("gb2312");
String submit=request.getParameter("submit");
if(submit!=null&&submit.equals("登陆")){
String uname=request.getParameter("uname");
String upass=request.getParameter("upass");
User user=new User();
user.setUname(uname);
user.setUpass(upass);
if(Land.login(user)){
HttpSession session=request.getSession(true);
session.setAttribute("user",user);
request.getRequestDispatcher("index.jsp").forward(request,response);
}else{
HttpSession session=request.getSession(true);
session.setAttribute("user",user);
request.getRequestDispatcher("index3.jsp").forward(request,response);
}
}
if(submit!=null&&submit.equals("注册")){
String uname=request.getParameter("uname");
String upass=request.getParameter("upass");
User user=new User();
user.setUname(uname);
user.setUpass(upass);
if(Land.login(user)){
HttpSession session=request.getSession(true);
session.setAttribute("user",user);
request.getRequestDispatcher("index1.jsp").forward(request,response);
}else if(login.login(user)){
HttpSession session=request.getSession(true);
session.setAttribute("user",user);
request.getRequestDispatcher("index2.jsp").forward(request,response);
}
}
}
}
Login代码:
<%--
Document : Login
Created on : 2010-10-9, 21:03:15
Author : guzhihao
Faction :前台登陆的页面的实现
--%>
<%@page language="java"contentType="text/html;charset=gb2312"%>
<html>
<head>
<title>Login.jsp</title>
</head>
<body style="text-align: center">
<form action="UserServlet"method="post">
<table>
<tr>
<h5>提示：</h5>
</tr>
<tr>
<h5>如果有已注册请直接登录</h5>
</tr>
<tr>
<h5>如果没有注册请直接注册</h5>
</tr>
<tr>
<td>用户名</td>
<td><input type="text"name="uname"/></td>
</tr>
<tr>
<td>密 码:</td>
<td><input type="text"name="upass"></td>
</tr>
<tr>
<td> </td>
<td>
<input type="submit"name="submit"value="登陆"/>
<input type="submit"name="submit"value="注册"/>
</td>
</tr>
</table>
</form>
</body>
</html>
index代码
<%--
Document : index
Created on : 2010-10-8, 21:03:15
Author : guzhihao
Faction :用于实现登陆成功的显示信息的JSP页面
--%>
<%@page language="java"import="Servlet1.*"contentType="text/html;charset=gb2312"%>
<html>
<head>
<title>index.jsp</title>
</head>
<body style="text-align: center">
${sessionScope.user.uname},欢迎您
</body>
</html>
User代码
/*
Document : User
Created on : 2010-10-9, 21:03:15
Author : guzhihao
Fuction : save imfomation of user
*/
package Servlet1;
public class User {
//private Integer uid;
private String uname;
private String upass;
public String getUname(){
return uname;
}
public void setUname(String uname){
this.uname=uname;
}
public String getUpass(){
return upass;
}
public void setUpass(String upass){
this.upass=upass;
}
}
Userland代码
/*
Document : UserLand
Created on : 2010-10-9, 21:03:15
Author : guzhihao
Faction :一个实现登陆具体步骤的bean页面
*/
package Servlet1;
import java.sql.*;
public class UserLand {
public boolean login(User user){
Connection conn=null;
PreparedStatement ps=null;
ResultSet rs=null;
try{
Class.forName("com.mysql.jdbc.Driver");
conn=DriverManager.getConnection(
"jdbc:mysql://localhost:3306/cars","root","1232323");
String sql="Select uname,upass from user";
ps=conn.prepareStatement(sql);
rs=ps.executeQuery();
while(rs.next()){
if(user.getUname().equals(rs.getString("uname"))&&user.getUpass().equals(rs.getString("upass"))){
return true;
}
}
//return false;
}catch(Exception e){
e.printStackTrace();
}finally{
try{
rs.close();
ps.close();
conn.close();
}catch(SQLException e){
e.printStackTrace();
}
}
return false;
}
}
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