JSP page - fill bean - to servlet

BASONJS

Hi all, I have been trying to find this out for 4 days straight, doing all types of research and yet I cannot find it, although it seems like one of the most fundamental things I can think of. I am new to jsps and servlets but not new to java, so please be patient with me _____________________________________________________ SCENARIO: 1) I have an index.jsp page with a form with 1 field for the user to fill up. 2) I have a bean which I am trying to fill up from the index page itself. 3) I have a servlet that handles the request _____________________________________________________ INDEX PAGE:

<%@ page import="com.java2s.*"%>

What's your name?

_____________________________________________________ BEAN:

package com.java2s;

public class bean {
String username;

public void setUsername( String value )
{
    username = value;
}

public String getUsername() 
{ 
    return username; 
}

}

_____________________________________________________ SERVLET:

package com.java2s;

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 MyServlet extends HttpServlet {

protected void processRequest(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException 
{

    HttpSession session = request.getSession(true);
    // Get the bean from the session
    bean myBean = (bean)session.getAttribute("bean");

    // if the bean is not in session instantiate a new bean
    if (myBean == null)
    {
        myBean = new bean();
        myBean.setUsername("FAILED");
    }

    request.setAttribute("bean", myBean);
    request.getRequestDispatcher("test.jsp").forward(request, response);
}

}

____________________________________________________ PROBLEM: I get the bean in the servlet, that is to say: bean myBean = (bean)session.getAttribute("bean"); actually returns an object and not null, thats not a problem. The proble

hansoctantan

Your code is different in my code... I cant figure out whats the error in that but If you want to fill a bean heres some simple codes... JSP

<%@ 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">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
</head>
<body>
<form action="myServlet" method="post">
<input type="text" name="name"/>
<input type="submit"/>
</form>
</body>
</html>

Servlet

package samplePack;

import java.io.IOException;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

/**
* Servlet implementation class myServlet
*/
public class myServlet extends HttpServlet {
private static final long serialVersionUID = 1L;

/\*\*
 \* @see HttpServlet#HttpServlet()
 \*/
public myServlet() {
    super();
    // TODO Auto-generated constructor stub
}

/\*\*
 \* @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
 \*/
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
	// TODO Auto-generated method stub
}

/\*\*
 \* @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
 \*/
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
	// TODO Auto-generated method stub
	myBean bean = new myBean(request.getParameter("name"));
	System.out.println(bean.getName());
}

}

BEAN

package samplePack;

public class myBean {
private String name = null;

public myBean(String name) {
	this.name = name;
}

public String getName() {
	return name;
}

public void setName(String name) {
	this.name = name;
}

}

hope this help...

modified on Monday, April 5, 2010 10:54 PM