jsp登陆代码

我也是才学，写了一个代码比较粗糙，希望对你能有帮助//Pojo类package pojo;public class User {
private String userName;
private String pwd;
public String getUserName() {
return userName;
}
public void setUserName(String userName) {
this.userName = userName;
}
public String getPwd() {
return pwd;
}
public void setPwd(String pwd) {
this.pwd = pwd;
}

// public static void main(String[] args){
// User u=new User();
// u.setPwd("123");
// System.out.println(u.getPwd());
// }
}package pojo;
import static JDBC.JDBCFactory.*;
import java.util.*;
import java.sql.*;public class UserOper {// public static List SelectAll(){
// List all=new ArrayList();
// Connection conn=null;
// Statement stmt=null;
// ResultSet rs=null;
// conn=getConn();
// try {
// stmt=conn.createStatement();
// String sql="select * from user_info";
// rs=stmt.executeQuery(sql);
// while(rs.next()){
// User user=new User();
// user.setUserName(rs.getString(1));
// user.setPwd(rs.getString(2));
// all.add(user);
// }
// } catch (SQLException e) {
// // TODO Auto-generated catch block
// e.printStackTrace();
// }
// return all;
// }

public static boolean addUser(User u){
boolean flag=false;
Connection conn=null;
PreparedStatement pst=null;
ResultSet rs=null;
conn=getConn();
try {
String sql="insert into user_info values(?,?)";
pst=conn.prepareStatement(sql);
pst.setString(1,u.getUserName());
pst.setString(2,u.getPwd());
int n=pst.executeUpdate();
if(n>0)
flag=true;
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
finally{
close(conn,pst,rs);
}
return flag;
}

public static boolean checkUser(User u){
boolean flag=false;
Connection conn=null;
PreparedStatement pst=null;
ResultSet rs=null;
conn=getConn();
String sql="select * from user_info where userName=? and pwd=?";
try {
pst=conn.prepareStatement(sql);
pst.setString(1, u.getUserName());
pst.setString(2, u.getPwd());
rs=pst.executeQuery();
while(rs.next()){
flag=true;
}
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return  flag;
}
// public static void main(String[] args){
// User u=new User();
// u.setUserName("Jerry");
// u.setPwd("018");
// System.out.println(checkUser(u));
// }
}//login.jsp
<%@ page language="java" import="java.util.*" pageEncoding="gbk"%>
<%
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>登陆页面</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">
<script type="text/javascript">
function check()
{
if(document.forms[0].userName.value=="")
{
alert("用户名不能为空");
document.forms[0].userName.focus();
return false;
}
if(document.forms[0].pwd.value=="")
{
alert("密码不能为空");
document.forms[0].pwd.focus();
return false;
}
}
</script>
  </head>

  <body>
  <center>
  <h1>登陆页面</h1>
<form action="test/check.jsp" method="post" onsubmit="return check()">
  <table>
  <tr>
  <td align="right">用户名:</td>
  <td><input type="text" name="userName"></td>
  </tr>
  <tr>
  <td align="right">密码:</td>
  <td><input type="password" name="pwd"></td>
  </tr>
  <tr><td><br></td><td colspan="2"><input type="submit" value="登陆"><input type="reset" value="重填">  <a href="test/register.jsp">注册</a></td></tr>
  </table>
  </form>
  </center>
  </body>
</html>//check.jsp
<%@ page language="java" import="java.util.*" pageEncoding="gbk"%>
<%@ page language="java" import="pojo.*"%>
<%
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 'check.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">
  </head>

  <body>
  <%request.setCharacterEncoding("gbk");
   UserOper uo=new UserOper();
   String userName=request.getParameter("userName");
   String pwd=request.getParameter("pwd");
   User u=new User();
   u.setUserName(userName);
   u.setPwd(pwd);
   if(uo.checkUser(u)){
   %>
   <jsp:forward page="welcome.jsp"></jsp:forward>
   <%}
   else
   response.sendRedirect("error.jsp");
   %>
  </body>
</html>
登陆代码？写个表单不就可以了吗，然后提交到servlet里去验证（不知道你那种框架)

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