Where do i save my beans in tomcat?

hi
I'm learning java beans and i'm relatively new to it. My jsp code is
<jsp:useBean id= "stringBean" class = "example.StringBean">
<jsp:setProperty name="stringBean" property="message" value="messg"/>
</jsp:useBean>
<html>
<head><title>Using Java Beans in a JSP page </title></head>
<body bgcolor = "blue">
<h3>The msg obtained by using a bean component is :</h3>
<font size = "5"><jsp:getProperty name="stringBean" property="message" />
</body>and the bean StringBean.java is
package example;
public class StringBean {
     private String message = " No message " ;
     public String getMessage() {
          return (message);
     public void setMessage(String message)
          this.message = message;
}Whenver i run the jsp page i get an error as follows
type Exception report
message
description The server encountered an internal error () that prevented it from fulfilling this request.
exception
org.apache.jasper.JasperException: /beans.jsp(1,1) The value for the useBean class attribute example.StringBean 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)
Can someone please help as to where do i save my class file in tomcat??

I've also had this problem (sorry for resurrecting an old question) and I put my class in the classes folder last night (within a folder appropriately named for the package it's in) and I got the same message as above, even after restarting the web application. Do I need to restart anything else or tell Tomcat where the bean is?
Cheers
-- Kev
Just searched for different terms and found that my class needs a public default constructor. Seem to have missed that part ;�)
Message was edited by:
KevDGill

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Where to save the java bean in Tomcat?

hi,
im using a bean in a jsp. my coding of jsp is:
<html>
<head>
<title> JSP BEAN EXAMPLE </title>
</head>
<body>
<%@ page language="java" import="Counter" %>
<jsp:useBean id="counter" scope="session" class="Counter" />
<jsp:setProperty name="counter" property="count" param="count" />
<% out.println("Count from scriplet code:" + counter.getCounter() + "<br>"); %>
Count from jsp:getProperty:
<jsp:getProperty name="counter" property="count"/>
<br>
</body>
</html>
the bean is:
public class Counter
int count=0;
public Counter()
public int getCounter()
count++;
return this.count;
public void setCounter(int c)
this.count=count;
please tell me the correct location where i should save my bean file?
my jsp is saved at :Tomcat 4.1\webapps\ROOT
im getting an error such as
2005-02-19 14:11:31 StandardWrapperValve[jsp]: Servlet.service() for servlet jsp threw exception
org.apache.jasper.JasperException: Cannot find any information on property 'count' in a bean of type 'Counter'
     at org.apache.jasper.runtime.JspRuntimeLibrary.getReadMethod(JspRuntimeLibrary.java:704)
     at org.apache.jasper.compiler.Generator$GenerateVisitor.visit(Generator.java:694)
     at org.apache.jasper.compiler.Node$GetProperty.accept(Node.java:552)
     at org.apache.jasper.compiler.Node$Nodes.visit(Node.java:1028)
     at org.apache.jasper.compiler.Node$Visitor.visitBody(Node.java:1070)
     at org.apache.jasper.compiler.Node$Visitor.visit(Node.java:1076)
     at org.apache.jasper.compiler.Node$Root.accept(Node.java:232)
     at org.apache.jasper.compiler.Node$Nodes.visit(Node.java:1028)
     at org.apache.jasper.compiler.Generator.generate(Generator.java:1917)
     at org.apache.jasper.compiler.Compiler.generateJava(Compiler.java:242)
     at org.apache.jasper.compiler.Compiler.compile(Compiler.java:369)
     at org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:473)
     at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:190)
     at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:295)
     at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:241)
     at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
     at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:247)
     at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:193)
     at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:256)
     at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
     at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
     at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
     at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
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     at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
     at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
     at org.apache.catalina.core.StandardContext.invoke(StandardContext.java:2415)
     at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:180)
     at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
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     at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:172)
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     at org.apache.tomcat.util.net.TcpWorkerThread.runIt(PoolTcpEndpoint.java:565)
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     at java.lang.Thread.run(Thread.java:536)
will some one please help me??

hi
first use package to store ur bean class. and change ur mutator and accessor methods like this
setCount() and getCount()
ur jsp code is here
<html>
<head>
<title> JSP BEAN EXAMPLE </title>
</head>
<body>
<%@ page language="java" import="SampleLib.Counter" %>
<jsp:useBean id="counter"class="SampleLib.Counter" />
<jsp:setProperty name="counter" property="count" param="count"/>
<% out.println("Count from scriplet code:" + counter.getCount() + "<br>"); %>
Count from jsp:getProperty:
<jsp:getProperty name="counter" property="count"/>
<br>
</body>
</html>
ur bean is herepackage SampleLib; // i have added package statement here
public class Counter
int count=0;
public Counter()
public int getCount()
count++;
return this.count;
public void setCount(int c)
this.count=count;
Bye for now
sat

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I am learning JSP. I want to know where I should put the bean class? Which directory should I put the bean class?
note that I am using Tomcat 4.1
johnwen
24-12-2005

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