JSP problem

Doodee · 08-05-2006 12:41am #1

right, been having this problem for some time and its wrecking my head.

Basically, I have a login form in a JSP. This uses a Bean (LoginDetails) to obtain the login details from another class(LoginHelper).
Both these are contain in a package called login.
They compile with no errors. However, tomcat is giving out the common error of:

The value for the useBean class attribute app.login.loginDetails is invalid.

The code is as follows

Login_form.jsp

<%@page contentType="text/html"%>
<%@ page import="login.LoginDetails" %>
<html>
<head><title>Login Form</title></head>
<body>

<jsp:useBean id="loginDetails" class="app.login.loginDetails" scope="request" />
<jsp:setProperty name="LoginDetails" property="*"/>

<Form action="login.jsp" method="post">
<table border='0'>
<TR>
    <TD>
        Enter User ID:
    </TD>
    <TD>
        <input type='Text' name ='userID' value='<%=loginDetails.getUsername()%>'>
    </TD>
<TR>
    <TD>
        Enter Password:
    </TD>
    <TD>
        <input type='Password' name ='password' value='<%=loginDetails.getPassword()%>'>
    </TD>
</TR>
<TR>
    <TD>
        <input type ='submit' value='Login'>
    </TD>
</TR>
</body>
</html>

LoginDetails.java

package login;

public class LoginDetails
{
	public LoginDetails()
	{
	}

	String username;
	String password;

	public void setUsername(String username)
	{
		this.username = username;
	}

	public String getUsername()
	{
		return username;
	}

	public void setPassword(String password)
	{
		this.password = password;
	}

	public String getPassword()
	{
		return password;
	}

};

LoginHelper.java

package login;

public class LoginHelper
{
	public boolean checkLogin(LoginDetails loginDetails)
	{
		if (("doodee".equals(loginDetails.getUsername())) && ("doodee".equals(loginDetails.getPassword())))
		{
			return true;
		}
		else
		{
			return false;
		}
	}
};

The .java files and classes are located in the following directory address: app/login/

I have also tried placing them in the WEB-INF/classes folder but with no luck.

Any help is appreciated cause at this point I havent many hairs left to pull out.

lynchie · 08-05-2006 8:51am

Your classes are defined in a package "login" whereas in the useBean you declare them as "app.login".

Doodee · 08-05-2006 9:09am

if i change the package to app.login; and then try and compile I get the following

LoginHelper.java
login/LoginHelper.java:5: cannot resolve symbol
symbol : class LoginDetails
location: class app.login.LoginHelper
public boolean checkLogin(LoginDetails loginDetails)
^
1 error

Doodee · 08-05-2006 9:41am

have changed the loginhelper code as I did not have a constructor.

package app.login;

public class LoginHelper {

	public LoginHelper() {
	}

	public boolean checkLogin(LoginDetails loginDetails) {

		if ( ("doodee".equals(loginDetails.getUsername())) && ("doodee".equals(loginDetails.getPassword())) )
		{
			return true;
		}
		else{
			return false;
		}
	}
}

lynchie · 08-05-2006 1:11pm

Doodee wrote:

if i change the package to app.login; and then try and compile I get the following

LoginHelper.java
login/LoginHelper.java:5: cannot resolve symbol
symbol : class LoginDetails
location: class app.login.LoginHelper
public boolean checkLogin(LoginDetails loginDetails)
^
1 error

And your java file is in the correct package structure too? i.e. app\login\LoginHelper.java and app\login\LoginDetails.java
Also, have you changed LoginDetails package to app.login too?

Sniipe · 08-05-2006 1:43pm

so in his main folder he should have LoginForm.jsp and a folder called WEB-INF

In the WEB-INF folder he has classes folder
in the classes folder he has app folder
in the app folder he has login folder
in the login folder he has the class files

would that be right?
I don't know too much about JSP so I'm kind of interested in knowing how to do this.

I've put his code onto my machine. And have the -> packages app.login; in the 2 java files.

I still get the same error as Doodee:

org.apache.jasper.JasperException: /LoginForm.jsp(5,0) The value for the useBean class attribute app.login.loginDetails is invalid.

in LoginForm.jsp on line 5 I have:

<jsp:useBean id="loginDetails" class="app.login.loginDetails" scope="request" />

I don't see the problem.
But I changed the word class to type and got this:

[B]HTTP Status 500 - [/B]

[B]type[/B] Exception report
[B]message[/B] 
[B]description[/B] [U]The server encountered an internal error () that prevented it from fulfilling this request.[/U]
[B]exception[/B] 
org.apache.jasper.JasperException: Unable to compile class for JSPAn error occurred at line: 5 in the jsp file: /LoginForm.jspGenerated servlet error:app.login.loginDetails cannot be resolved or is not a typeAn error occurred at line: 5 in the jsp file: /LoginForm.jspGenerated servlet error:app.login.loginDetails cannot be resolved or is not a type

Is that progress in the problem or is that just making it worse?

Sniipe · 08-05-2006 2:27pm

try this: I got the page to appear
[CODE<jsp:useBean id="loginDetails" class="app.login.LoginDetails" scope="request" />
[/code]
The L is capital

JSP problem

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