把JSP传数据的到JAVABEAN
jsp文件如下：
<%@ page contentType="text/html; charset=GBK" %>
<%@include file="Welcome.jsp" %>
<html>
<head>
<title>
Login
</title>
</head>
<body bgcolor="#ffffff">
<h3>
Login page!
</h3>
<form method="post" name="LoginForm" action="loginservlet">
yourname:<input type="text" name="username"><br>
password:<input type="text" name="password"><br><br>
<input type="submit" name="Submit" value="Submit"> 
<input type="reset" value="Reset">
</form>
<a href="Register.jsp">Register</a>
</body>
</html>
javaBean文件如下：
package myjava.bean;
import java.util.*;
tDatabase.*;
import java.sql.*;
public class UserBean extends ConnectDatabase{
    private String userName;
    private String password;
    private Hashtable customList = new Hashtable();
    public UserBean() {
    }
  public String getPassword() {
      return password;
  }
  public void setPassword(String password) {
this.password = password;
  }
  public UserBean(String username, String password) {
        this.userName = username;
        this.password = password;
  }
public void add(String username,String password){
    ResultSet rs=null;
javaservlet和jsp的比较    connect();
    String sql="insert into customer values('',"+this.userName+","+this.password+")";
  try{
      data(sql);
  } catch (SQLException ex) {
      }
}
/*public boolean check(){
    int count=0;
    connect();
    String sql="select username,password from customer where username='"+this.userName+"' and password='"+this.password+"'";
    ResultSet rs=null;
    try {
rs = data(sql);
      if (rs.next()){
          return true;
      }
      else{
        return false;
      }
    }
    catch (SQLException ex) {
      return false;
    }
}
*/
public boolean check(){
    boolean re=true;
    int count=0;
    connect();
    String sql="select count(*) as a from customer where username='"+userName+"' and password='"+password+"'";
    ResultSet rs=null;
    try {
      rs = data(sql);
      if (rs.next()){
        Int("a");
        System.out.println(count);
      }
      if (count==0){
        return false;
      }
      else{
        return re;
      }
}
    catch (SQLException ex) {
      return false;
    }
}
public void remove(){
  connect();
  String sql="delete from customer where username='"+userName+"'";
  try {
    getdata(sql);
  }
  catch (SQLException ex) {
    ex.printStackTrace();
  }
  diconnect();
}
public void update(){
  connect();
  String sql="update from customers set password='"+password+"' where username='"+userName+"'";
  try {
    getdata(sql);
  }
catch (SQLException ex) {
    ex.printStackTrace();
  }
}
  public String getUserName() {
    return userName;
  }
  public void setUserName(String userName) {
    this.userName = userName;
  }
}
Servlet文件如下：
package myjava.servlet;
import javax.servlet.*;
import javax.servlet.http.*;
import java.io.*;
import java.util.*;
import myjava.bean.UserBean;
public class LoginServlet extends HttpServlet {
private static final String CONTENT_TYPE = "text/html; charset=GBK";
//Initialize global variables
public void init() throws ServletException {
}
//Process the HTTP Post request
public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
  // response.setContentType(CONTENT_TYPE);
  String username = Parameter("username");
  String password = Parameter("password");
    System.out.println("In the loginservlet!");
  UserBean user=new UserBean(username,password);
  if(user.check()){
    System.out.println(user.check() );
    HttpSession Session();
    session.setAttribute("user",username);
    response.sendRedirect("/Main.jsp");
  }
  else{
      System.out.println("Login false,try again!");
      response.sendRedirect("/Login.jsp");
}
}
}　5号仓库　www.5hck

版权声明：本站内容均来自互联网，仅供演示用，请勿用于商业和其他非法用途。如果侵犯了您的权益请与我们联系QQ:729038198，我们将在24小时内删除。