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The method setAttribute(String, Object) in the type HttpSession is not applicable for  RSS feed

 
Suryanarayanan Jayaraman
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Posts: 2
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Dear Sir,

While i am doing this project before inserting this sessionAttribute my programme was worked fine with JDK 1.5.1 but after this following error had been occuring after uninstalling my JDK 1.5.1 and installed my new JDK 1.6.1

org.apache.jasper.JasperException: Unable to compile class for JSP

An error occurred at line: 13 in the jsp file: /forward.jsp
Generated servlet error:

The method setAttribute(String, Object) in the type HttpSession is not applicable for the arguments (String, int)

SOURCE CODE :
<%@ page import="java.sql.*, java.io.*, java.util.*" %>
<% Class.forName("com.mysql.jdbc.Driver");%>

<%
Connection connection = DriverManager.getConnection(
"jdbc:mysql://localhost:3306/tpl", "root", "root");
Statement statement = connection.createStatement() ;
session.removeAttribute("eno");
ResultSet resultset = statement.executeQuery("select * from emast where eno="+ request.getParameter("eno")+" AND pwd='" +request.getParameter("pwd")+"'");

%>

<% if (resultset.next()) {
session.setAttribute("eno", resultset.getInt(1));
%>

<jsp:forward page="index.jsp">
<jsp:param name="eno" value="<%= resultset.getInt(1)%>"/>
<jsp:param name="fname" value="<%= resultset.getString(3)%>"/>
<jsp:param name="desig" value="<%= resultset.getString(4)%>"/>
<jsp:param name="dept" value="<%= resultset.getString(5)%>"/>
</jsp:forward>
<%
}
else
{
%>
<%@ include file="login.jsp"%>
<center><b><%="Sorry! Enter the Correct Password"%></b></center>
<%
}
%>

PLEASE HELP IN THIS REGARD
WAITING FOR YOUR REPLY
 
Seetharaman Venkatasamy
Ranch Hand
Posts: 5575
Eclipse IDE Java Windows XP
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Originally posted by Suryanarayanan Jayaraman:

An error occurred at line: 13 in the jsp file: /forward.jsp
Generated servlet error:

The method setAttribute(String, Object) in the type HttpSession is not applicable for the arguments (String, int)



Hi,

it shows your jdk is not support boxing and unboxing.This type of error will come in jdk1.4(before release of jdk1.5)

i guess you are using IDE . just confirm your source is pointing to the jdk 1.6 only ..

example, if you use netbeans, by default it points jdk1.4

Hope This Helps
[ November 02, 2008: Message edited by: seetharaman venkatasamy ]
 
Amit Ghorpade
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Posts: 2856
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Welcome to Javaranch Suryanarayanan Jayaraman

As said above the problem is with the boxing of the int, a better approach would be using the wrapper class or a String type.
And its not a really good practice to have all that connection code in the JSP.
[ November 02, 2008: Message edited by: Amit Ghorpade ]
 
vipin raimcs
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Its not good practise to write the code as session.setAttribute("eno", resultset.getInt(1));
Please always avoid this things and use session.setAttribute("eno", new Integer(resultset.getInt(1)));
 
Suryanarayanan Jayaraman
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Hi,
Find the prompt reply, in future course of time i may not make this mistake again as suggested by you. I had changed my programed as you
mentioned by you like this : session.setAttribute("eno", new Integer(resultset.getInt(1)));
but now the error is like this:
HTTP Status 500 -

type Exception report

message

description The server encountered an internal error () that prevented it from fulfilling this request.

exception

javax.servlet.ServletException: com.mysql.jdbc.Driver
org.apache.jasper.runtime.PageContextImpl.doHandlePageExceptionkindly me give me out your valuable suggestion to solve this problem premenately
 
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