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JSP BEAN Question

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posted 16 years ago

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Hi,

I am trying to develop a simple JSP+Bean application. I am using Tomcat application.

I have placed my JSP in apache-tomcat-6.0.10\webapps\test.
Added <Context path="/test" docBase="star" debug="1" reloadable="true"/>
in server.xml

Here is my JSP code

<%@ page import = "com.stardeveloper.bean.test.NumberGuessBean" %>
 
<jsp:useBean id="numguess" class="com.stardeveloper.bean.test.NumberGuessBean" scope="session"/>
<jsp:setProperty name="numguess" property="*"/>
 
<html>
<head><title>Number Guess</title></head>
<body bgcolor="white">
<font size=4>
 
<% if (numguess.getSuccess()) { %>
 
  Congratulations!  You got it.
  And after just <%= numguess.getNumGuesses() %> tries.<p>
 
  <% numguess.reset(); %>
 
  Care to <a href="numguess.jsp">try again</a>?
 
<% } else if (numguess.getNumGuesses() == 0) { %>
 
  Welcome to the Number Guess game.<p>
 
  I'm thinking of a number between 1 and 100.<p>
 
  <form method=get>
  What's your guess? <input type=text name=guess>
  <input type=submit value="Submit">
  </form>
 
<% } else { %>
 
  Good guess, but nope.  Try <b><%= numguess.getHint() %></b>.
 
  You have made <%= numguess.getNumGuesses() %> guesses.<p>
 
  I'm thinking of a number between 1 and 100.<p>
 
  <form method=get>
  What's your guess? <input type=text name=guess>
  <input type=submit value="Submit">
  </form>
 
<% } %>
 
</font>
</body>
</html>

here is my JAVA code

i compiled the java code and placed the class file in apache-tomcat-6.0.10\webapps\ROOT\WEB-INF\classes\com\stardeveloper\bean\test.

when i try to run the JSP page , i get an error which mentions "The value for the useBean class attribute com.stardeveloper.bean.test.NumberGuessBean is invalid."

Please advise

Bear Bibeault

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posted 16 years ago

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I have placed my JSP in apache-tomcat-6.0.10\webapps\test.

i compiled the java code and placed the class file in apache-tomcat-6.0.10\webapps\ROOT\WEB-INF\classes\com\stardeveloper\bean\test.

You put the bean in one web application, and the JSP in another. Of course they're not going to hook up to each other.

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Amar Naik

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posted 16 years ago

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yeah i realized it

I put my class file in apache-tomcat-6.0.10\webapps\test\WEB-INF\classes

In JSP i changed the below details

<%@ page import = "NumberGuessBean" %>

<jsp:useBean id="numguess" class="NumberGuessBean" scope="session"/>

But i still get the same error. did i do it properly now?

Amar Naik

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posted 16 years ago

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i removed the package details from java code. I recompiled the code and i get the following error now

org.apache.jasper.JasperException: Unable to load class for JSP
org.apache.jasper.JspCompilationContext.load(JspCompilationContext.java:600)
org.apache.jasper.servlet.JspServletWrapper.getServlet(JspServletWrapper.java:142)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:320)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:320)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:266)
javax.servlet.http.HttpServlet.service(HttpServlet.java:803

Bear Bibeault

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posted 16 years ago

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Originally posted by Amar Naik:
i removed the package details from java code.

Why? That pretty much guarantees that the bean will never be found. It must be in a package.

See the JSP FAQ for details.
[ May 02, 2007: Message edited by: Bear Bibeault ]

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Amar Naik

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posted 16 years ago

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I am sorry, i am getting confused

My java file is in apache-tomcat-6.0.10\webapps\test\WEB-INF\classes
and jsp file is in apache-tomcat-6.0.10\webapps\test

do i still need a package? If yes what should be the package details

Amar Naik

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posted 16 years ago

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i restarted the server and got my application running
I did create a new folder called a in classes directory, added the package details in java code, recompiled , restarted the server

it works now

thanks for the help

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