Hi,
I made a test javabean (HelloBean) which is part of package called
br.eti.macaiba.test.bean
When I put the directory structure of the package in
$CATALINA_HOME/webapps/ROOT/WEB-INF/classes/
there is no problem.
But when I try to put the jar file in
$CATALINA_HOME/webapps/ROOT/WEB-INF/lib/
I receive the error message below:
Apache Tomcat/4.0.3 - HTTP Status 500 - Internal Server Error
Does anyone have any idea ?
Thanks In Advance,
Joao Macaiba.
PS: Below are the files and full error message:
--- BEGIN : HelloBean.java ---
package br.eti.macaiba.test.bean;
public class HelloBean implements java.io.Serializable {
private String name;
HelloBean() {
name = "World";
}
public String getName() {
return name;
}
public void setName(String n) {
name = n;
}
}
--- END : HelloBean.java ---
--- BEGIN : HelloBean.jsp ---
<html>
<head><title>This is the HelloBean example</title></head>
<body>
<jsp:useBean id="hello" class="br.eti.macaiba.test.bean.HelloBean"/>
<jsp:setProperty name="hello" property="name" param="name"/>
Hello, <jsp:getProperty name="hello" property="name"/> !
</body>
</html>
--- END : HelloBean.jsp ---
--- BEGIN : jar -xvf macaiba.jar ---
created: META-INF/
extracted: META-INF/MANIFEST.MF
created: br/
created: br/eti/
created: br/eti/macaiba/
created: br/eti/macaiba/test/
created: br/eti/macaiba/test/bean/
extracted: br/eti/macaiba/test/bean/HelloBean.class
--- END : jar -xvf macaiba.jar ---
--- BEGIN : dump of tomcat error message ---
Apache Tomcat/4.0.3 - HTTP Status 500 - Internal Server Error
type Exception report
message Internal Server Error
description The server encountered an internal error (Internal Server
Error) that prevented it from fulfilling this request.
exception
javax.servlet.ServletException: class br.eti.macaiba.test.bean.HelloBean :
java.lang.IllegalAccessException: Class java.beans.Beans can not access a
member of class br.eti.macaiba.test.bean.HelloBean with modifiers ""
at
org.apache.jasper.runtime.PageContextImpl.handlePageException(PageContextImpl.java:463)
at
org.apache.jsp.HelloBean$jsp._jspService(HelloBean$jsp.java:104)
at
org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:107)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
at
org.apache.jasper.servlet.JspServlet$JspServletWrapper.service(JspServlet.java:202)
at
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:382)
at
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:474)
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:243)
at
org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:566)
at
org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:472)
at
org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:943)
at
org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:190)
at
org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:566)
at
org.apache.catalina.valves.CertificatesValve.invoke(CertificatesValve.java:246)
at
org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:564)
at
org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:472)
at
org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:943)
at
org.apache.catalina.core.StandardContext.invoke(StandardContext.java:2343)
at
org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:180)
at
org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:566)
at
org.apache.catalina.valves.ErrorDispatcherValve.invoke(ErrorDispatcherValve.java:170)
at
org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:564)
at
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:170)
at
org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:564)
at
org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:468)
at
org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:564)
at
org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:472)
at
org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:943)
at
org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:174)
at
org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:566)
at
org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:472)
at
org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:943)
at
org.apache.catalina.connector.http.HttpProcessor.process(HttpProcessor.java:1012)
at
org.apache.catalina.connector.http.HttpProcessor.run(HttpProcessor.java:1107)
at java.lang.Thread.run(Thread.java:536)
root cause
java.lang.InstantiationException: class br.eti.macaiba.test.bean.HelloBean
: java.lang.IllegalAccessException: Class java.beans.Beans can not access
a member of class br.eti.macaiba.test.bean.HelloBean with modifiers ""
at org.apache.jsp.HelloBean$jsp._jspService(HelloBean$jsp.java:70)
at
org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:107)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
at
org.apache.jasper.servlet.JspServlet$JspServletWrapper.service(JspServlet.java:202)
at
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:382)
at
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:474)
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:243)
at
org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:566)
at
org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:472)
at
org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:943)
at
org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:190)
at
org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:566)
at
org.apache.catalina.valves.CertificatesValve.invoke(CertificatesValve.java:246)
at
org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:564)
at
org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:472)
at
org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:943)
at
org.apache.catalina.core.StandardContext.invoke(StandardContext.java:2343)
at
org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:180)
at
org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:566)
at
org.apache.catalina.valves.ErrorDispatcherValve.invoke(ErrorDispatcherValve.java:170)
at
org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:564)
at
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:170)
at
org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:564)
at
org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:468)
at
org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:564)
at
org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:472)
at
org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:943)
at
org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:174)
at
org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:566)
at
org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:472)
at
org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:943)
at
org.apache.catalina.connector.http.HttpProcessor.process(HttpProcessor.java:1012)
at
org.apache.catalina.connector.http.HttpProcessor.run(HttpProcessor.java:1107)
at java.lang.Thread.run(Thread.java:536)
--- END : dump of tomcat error message ---
--
>From "The Practice Programming" by Brian W Kernighan & Rob Pike:
Another effective [debugging] technique is to explain your code to
someone else. This will often cause you to explain the bug to yourself.
Sometimes it takes no more than a few sentences, followed by an
embarrassed "Never mind. I see what's wrong. Sorry to bother you."
This works remarkbly well; you can even use non-programmers as
listeners. One university computer center kept a teddy bear near the help
desk. Students with mysterious bugs were required to explain them to the
bear before they could speak to a human counselor.
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| `. `'` | |
| `- | Be Happy! Be FREE! |
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