Java Beans - useBeans servlets fail to find class name

sharingan_sasuk · 31 Jan 2006 at 23:30

I have apache running with tomcat apache for java and jsp stuff. I have changed the root path of the tomcat apache to a particular place in my hdd so that the program file is completely away from the development file.

Ok, basically I am trying to do a useBean to call a servlet. I have nick this code from the web, as a tutorial to test it out. It can be found at this address...

http://www.apl.jhu.edu/~hall/java/Servlet-Tutorial/Servlet-Tutorial-JSP.html#Section8.2

So I created to files, one called BeanTest.jsp and the code is as follows.

Code:
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML>
<HEAD>
<TITLE>Reusing JavaBeans in JSP</TITLE>
<LINK REL=STYLESHEET
HREF="My-Style-Sheet.css"
TYPE="text/css">
</HEAD>

<BODY>

<CENTER>
<TABLE BORDER=5>
<TR><TH CLASS="TITLE">
Reusing JavaBeans in JSP</TABLE>
</CENTER>
<P>

<jsp:useBean id="test" class="hall.SimpleBean" />
<jsp:setProperty name="test"
property="message"
value="Hello WWW" />

<H1>Message: <I>
<jsp:getProperty name="test" property="message" />
</I></H1>

</BODY>
</HTML>

and the second one called SimpleBean.java and code

Code:
package hall;

public class SimpleBean {
private String message = "No message specified";

public String getMessage() {
return(message);
}

public void setMessage(String message) {
this.message = message;
}
}

I compile the above code it creates SimpleBean.class
I created a new folder in the same location as the three files created called classes. In there I created another folder called hall and in that placed the SimpleBean.java since I have read on the net that this is where class files should be kept.

WHen I use http://localhost/BeanText.jsp I get this error message...

HTTP Status 500 -

type Exception report

message

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

exception

org.apache.jasper.JasperException: /BeanTest.jsp(19,0) The value for the useBean class attribute hall.SimpleBean is invalid.
org.apache.jasper.compiler.DefaultErrorHandler.jspError(DefaultErrorHandler.java:39)
org.apache.jasper.compiler.ErrorDispatcher.dispatch(ErrorDispatcher.java:405)
org.apache.jasper.compiler.ErrorDispatcher.jspError(ErrorDispatcher.java:146)
org.apache.jasper.compiler.Generator$GenerateVisitor.visit(Generator.java:1223)
org.apache.jasper.compiler.Node$UseBean.accept(Node.java:1116)
org.apache.jasper.compiler.Node$Nodes.visit(Node.java:2163)
org.apache.jasper.compiler.Node$Visitor.visitBody(Node.java:2213)
org.apache.jasper.compiler.Node$Visitor.visit(Node.java:2219)
org.apache.jasper.compiler.Node$Root.accept(Node.java:456)
org.apache.jasper.compiler.Node$Nodes.visit(Node.java:2163)
org.apache.jasper.compiler.Generator.generate(Generator.java:3284)
org.apache.jasper.compiler.Compiler.generateJava(Compiler.java:189)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:286)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:267)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:255)
org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:563)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:293)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:314)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:264)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)

Looking at the above, it looks like the class SimpleBean cannot be found. I have tried lots of ways in which to solve this and nothing is working, so I resort to this forum to help me. So if anyone knows what is wrong, can you please reply me as soon as possible. Thanks

Java Beans - useBeans servlets fail to find class name

sharingan_sasuk

sharingan_sasuk