Using a bean in a servlet

In my application I am having:-
1)- a table in my database which contains the details of the user profile.
2)- a bean which contains the string variables for all the user details along with the getters and setters.
3)- a servelet and a jsp.
In servlet I want to fetch entire data of the table and want to assign the values to the setters of the bean.
in jsp I want to call that bean and want to use its getters to display the entire profile of the user.
I am finding compleatly unable to use the bean in the servlet, please help me out.

hi,
try like this..
after fetching all of your datas
store in setter method of the bean.
pass it as session.setAttribute ( "beanname", bean);
in jsp
get that session attribute
beanname b = (beanname) session.getAttribute ( "beanname" ) ;
<%=b.getMethod ()%>

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Hi,
I have a problem in getting the values from simple bean to servlet. The project has one html form. When the user click on the submit button one jsp will be invoked which calls a bean program to validate the user data for required fields. Based on the result, jsp program forward the control to a servlet which stores the data in a database. Otherwise another jsp is called to inform the user to fill in the required data.
My problem is how to send the data from bean to servlet?
The snippet of jsp that calls bean is like this :
<%!
%>
<jsp:useBean id="formHandler" class = "subFormBean" scope="request">
<jsp:setProperty name="formHandler" property="*"/>
</jsp:useBean>
<%
if (formHandler.validate()) {
%>
<jsp:forward page="subscriberRegistration"/>
<%
} else {
%>
<jsp:forward page="retry.jsp"/>
<%
%>
And the snippet of the bean is like this :
public boolean validate() {
boolean bool=true;
if (subname.equals("")) {
errors.put("subname","Please enter your Name");
subname="";
bool=false;
public subFormBean() {
subname="";
public String getSubName() {
return subname;
public void setSubName(String sname) {
subname =sname;
The servlet which is to receive the data is like this :
public class subscriberRegistration extends HttpServlet{
protected void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
subFormBean sfb = new subFormBean();
sfb.setSubName(subname);
But I'm getiing error while trying to compile the servelet saying that no variables found - sfb, subname etc.
Please let me know how to invoke the bean from servlet. I want to use servlet to instead of jsp to insert records into database. How can i do this? Please help me. Thanks in advance.

Hi Tolls,
Sorry, I'll give a bigger snippet of the prog.code below :
public class subscriberRegistration extends HttpServlet{
protected void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
subFormBean sfb = new subFormBean();
sfb.setSubName(subname);
sfb.setSubAddress(subaddress);
sfb.setSubCity(subcity);
sfb.setSubState(substate);
sfb.setSubCntry(subcntry);
sfb.setSubPin(subpin);
public void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException{
response.setContentType("text/html");
PrintWriter pw = response.getWriter();
Class.forName("oracle.jdbc.driver.OracleDriver");
connection = DriverManager.getConnection(connectionURL,"scott","tiger");
stmt = connection.createStatement();
rs = stmt.executeQuery("SELECT subid_seq.NEXTVAL FROM DUAL");
while(rs.next()) {
String subno = rs.getString("NEXTVAL");
PreparedStatement pst = connection.prepareStatement("insert into eps_subscriber(eps_subno, eps_subname, eps_subaddress, eps_subcity, eps_substate, eps_subcntry, eps_subpin, eps_subphno, eps_subemailid, eps_subuserid, eps_subpwd) values(?,?,?,?,?,?,?,?,?,?,?)");
pst.setString(1,subno);
pst.setString(2,sfb.subname);
pst.setString(3,sfb.subaddress);
pst.setString(4,sfb.subcity);
pst.setString(5,sfb.substate);
pst.setString(6,sfb.subcntry);
pst.setString(7,sfb.subpin);
I'm validating the form data in beans program. Servlet is used to insert records into the database. So, i'm trying to capture data from the bean. How to capture the data from the bean to servlet? Or should I get it from the form fields directly? The servlet worked well when data was captured directly from html form fields. Please help me to fix this. Thanks in advance.

Retrieve data from a bean into a Servlet

Hi,
I created a simple JSP file called index.jsp situated in application root, then I associated this JSP with a java bean in order to collect data after the form submission, the attribute Action inside the Form tag points on a Servlet called Login situated in the application com.myapp.servlets package.
the problem is that, using the scope="session" in the JSP page, I'm able to get catch the bean generated after the submission of the form, even the action is the Servlet called Login neither a back to the currest JSP or a redirection to another JSP, but in the same time, when I try to use bean methods to read the data (username, password) it gives null as result, I'm not able to understand the behavior of the bean which is created via Form submission but unreachable via the Servlet.
herese the code
the JSP (index.jsp)
<%@ page contentType="text/html; charset=iso-8859-1" language="java" import="java.sql.*" errorPage="" %>
<jsp:useBean id="MyBean" scope="session" class="com.datalog.beans.LoginBean"/>
<jsp:setProperty name="MyBean" property="*"/>
<!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=iso-8859-1">
<title>Document sans nom</title>
</head>
<body>
<table width="100%" border="1">
<tr>
    <td> </td>
</tr>
<tr>
    <td><form name="form1" method="post" action="doLogin">
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        <tr>
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        </tr>
        <tr>
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          <td><input name="password" type="password" id="password"></td>
        </tr>
        <tr>
          <td> </td>
          <td><input type="submit" name="Submit" value="Envoyer"></td>
        </tr>
      </table>
    </form></td>
</tr>
<tr>
    <td>username after submission <jsp:getProperty name="MyBean" property="username" /><br>
     password after submission <jsp:getProperty name="MyBean" property="password" /></td>
</tr>
</table>
</body>
</html>The bean (LoginBean.java)
package com.datalog.beans;
import java.io.Serializable;
public class LoginBean implements Serializable {
    private String username;
    private String password;
    public LoginBean(){
        System.out.println("i'm the bean ... "+this);
    public String getPassword() {
        return password;
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        this.password = password;
        System.out.println(this.password);
    public String getUsername() {
        return username;
    public void setUsername(String username) {
        this.username = username;
        System.out.println(this.username);
}Servlet (Login.java)
* Created on 14 d�c. 2004
* TODO To change the template for this generated file go to
* Window - Preferences - Java - Code Style - Code Templates
package com.datalog.cpservlets;
import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.ServletConfig;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import com.datalog.beans.LoginBean;
* Servlet Class
* @web.servlet              name="Login"
*                           display-name="Name for Login"
*                           description="Description for Login"
* @web.servlet-mapping      url-pattern="/Login"
* @web.servlet-init-param   name="A parameter"
*                           value="A value"
public class Login extends HttpServlet {
    public Login() {
        super();
        // TODO Auto-generated constructor stub
    public void init(ServletConfig config) throws ServletException {
        super.init(config);
        // TODO Auto-generated method stub
    protected void doGet(HttpServletRequest req, HttpServletResponse resp)
        throws ServletException,
        IOException {
        // TODO Auto-generated method stub
        super.doGet(req, resp);
    protected void doPost(
        HttpServletRequest request,
        HttpServletResponse response) throws ServletException, IOException {
        // TODO Auto-generated method stub
        PrintWriter out = response.getWriter();
        out.println("<br><br>Servlet (Login) in use.<br>");
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        out.println("password from request.getParameter : "+request.getParameter("password")+"<br>");
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        LoginBean myBean = (LoginBean)session.getAttribute("MyBean");
        out.println("supposed bean adr : "+myBean);
        out.println("<br>username from myBean.getUsername : <b>"+myBean.getUsername()+"</b><br>");
        out.println("<br>password from myBean.getPassword : <b>"+myBean.getPassword()+"</b><br>");
}thank's.

The code that would populate the bean is here:
<jsp:useBean id="MyBean" scope="session" class="com.datalog.beans.LoginBean"/>
<jsp:setProperty name="MyBean" property="*"/>
When this code runs, it
1 - creates a LoginBean (if one is not already present)
2 - Populates the loginBean from the request parameters.
But this code is currently running when you generate the login page - not when you push the submit button.
Solutions
1 - Submit the form to a JSP page which runs the jsp:setProperty tag and then forwards to your Login servlet
2 - Retrieve the request parameters in your servlet and populate the bean. The jakarta commons BeanUtils are the standard way to go here. They are actually preferable to the jsp:setProperty tag which has some "features" in its use.
Cheers,
evnafets

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I am also trying that scenario. So u can
Post the jsp form data to a Servlet which will act as a Controller.
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Similar kind of app is in www.roseindia.net
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testingProject with the first.jsp
testingProject\WEB-INF\classes\myPackage with the test.class
the first.asp
<%@ page import="myPackage.Test" %>
<html><head><title>Test</title></head>
<body bgcolor=white>
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<jsp:getProperty name="list" property="value1" />
<%=list.value1%>
<p>
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the Test.java
package myPackage;
public class Test{
String value1="testinggggggggg";
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the error
thanks in advance
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symbol : variable value1
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out.print(list.value1);
^
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There are two ways of getting info from the bean.
1) the jsp:getProperty tag, which seems correct in your code
2) the <%= ... tag. In that case you must write a valid java expression. In your case: list.getValue1()

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Edited by: BobXu on Nov 17, 2008 2:27 PM
Edited by: BobXu on Nov 17, 2008 2:32 PM

Huh?
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hello friends,
i'm new to jsp. i want to create an html form that accepts username and a value from four radio buttons and display back the entered name and checked radio button's value using java bean.
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thank you.

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Hi,
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Using a bean in a servlet

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