Re: JSP/JavaBean - Newbie help

From:
Lew <lew@nowhere.com>
Newsgroups:
comp.lang.java.beans,comp.lang.java.help,comp.lang.java.programmer
Date:
Sun, 01 Oct 2006 21:57:46 -0400
Message-ID:
<NKqdnUQqTvKG773YnZ2dnUVZ_tidnZ2d@comcast.com>
Dave wrote:

********
 index.jsp
********

<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
pageEncoding="ISO-8859-1"%>
<%@ page import="mybeans.*" %>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">


It's better to use the lower-case "html"; this will prepare you better for XHTML.

<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>Using SimpleBean</title>
</head>
<body>
<jsp:useBean id="msg" type="SimpleBean" />
Test Content
</body>
</html>


<jsp:useBean id="msg" class="mybeans.SimpleBean" />

I don't think the <%@ page import="mybeans.*" %> works to prevent the need to
fully qualify the class in a <jsp:useBean ... /> tag. I easily could be
mistaken here, but the Sun docs refer to
<jsp:useBean id="beanName" class="fully_qualified_classname" scope="scope" />

http://java.sun.com/j2ee/1.4/docs/tutorial/doc/index.html

*************
SimpleBean.java
*************

package mybeans;
public class SimpleBean
{
  ...
}

*******
web.xml
*******

 <servlet>
         <servlet-name>SimpleBean</servlet-name>
         <servlet-class>SimpleBean</servlet-class>
 </servlet>


SimpleBean is not a servlet.

 > SimpleBean.class is in
 > $CATALINA_HOME\webapps\JSPTest\WebContent\WEB-INF\classes\mybeans
 >
 > web.xml is in $CATALINA_HOME\webapps\JSPTest\WebContent\WEB-INF\

You should install the app in the webapps/ directory directly, not one level
down in WebContent/, i.e.,

$CATALINA_HOME/webapps/JSPTest/index.jsp
$CATALINA_HOME/webapps/JSPTest/WEB-INF/
$CATALINA_HOME/webapps/JSPTest/WEB-INF/classes/...

If WEB-INF/ is buried one level down then the container cannot find the
classes/ subdirectory.

http://java.sun.com/j2ee/1.4/docs/tutorial/doc/WebApp3.html#wp225219
http://tomcat.apache.org/tomcat-5.5-doc/appdev/deployment.html

- Lew

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