Need help with first JSP page in Tomcat, new to Java

**Gizmo007** · 09-23-2012

I am trying to figure out what I am doing wrong in Java. My JSP page is not working in Tomcat. I don't know if there is something wrong with the code or if it is Tomcat. I tried using a sample JSP page from the web and I am getting Hyper Text Transer Protocol 500 errors. ( can't abrieviate without getting an error that I am trying to post a link to another website) I am using Tomcat 6.0, I am not sure if the sample JSP page is old and now for Tomcat 6.0 I have to call a different set of commands to do the same thing? Or if the issue is with Tomcat. I am not sure if I also need to make a servlet in order for this to work, the web example didn't mention any server sided coding needing to be done so I assume I don't have to. I am completely new to Java.

Here is a sample JSP page that displays the date. Jsp pages will work in my browser if I encode them only in html and don't embed any java into the JSP page.

Code:

<{'at symbol'}%page contentType="" import="java.util.*" %> 
 
<Hyper Text Transer Protocol> 
<body>
 <p>&nbsp;</p>
 <div align="">
 <table border="0" cellpadding="0" cellspacing
 ="0" width="460" bgcolor="#999999">
 <tr>
 <td width="100%"><font size="6" color
 ="#800000">&nbsp;Date Example</font></td>
 </tr>
 <tr>
 <td width="100%"><b>&nbsp;Current Date 
 and time is:&nbsp; <font color="#0000ff"> 
 <%= new java.util.Date() %>
 </font></b></td>
 </tr>
 </table>
 </center>
 </div>
 </body>
</Hyper Text Transfer Protocol>

*** note there are some Hyper Text Transfer Protocol and 'at' tags I had to take out because for some reason the server is thinking I am trying to post links to other websites, when I am just trying to show the code. So including those tags in my code gives a red flag and I get the message I am forbidden to post links to other websites. So if there are obvious tags missing in my webpage code , you know why.

*** update: Java works in terminal. I tried compiling a general helloworld.java in javac and then executing helloworld in java and it worked fine. So I know java is installed and working the way it is suppose to.

***atreyu*** · 09-23-2012

What does the Apache or Tomcat error log say?

Can you provide a link to the website where you are getting your sample and instructions from? To post it in the forum, just replace the "http" with "hxxp".

**Cancerous** · 09-23-2012

HTTP is a networking protocol, you need HTML tags wrapped around the body.

**Gizmo007** · 09-24-2012

I have <hxxp></hxxp> tags wrapped around the body I can't put that on this forum because the server thinks I am referencing an external website and that is not allowed since I have less than 15 posts. This JSP page works fine if I load into my php directory and run it off of apache/php instead of directly through Tomcat

Here is a copy of the error I am getting

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: java.lang.NullPointerException
org.apache.jasper.servlet.JspServletWrapper.handle JspException(JspServletWrapper.java:522)
org.apache.jasper.servlet.JspServletWrapper.servic e(JspServletWrapper.java:416)
org.apache.jasper.servlet.JspServlet.serviceJspFil e(JspServlet.java:342)
org.apache.jasper.servlet.JspServlet.service(JspSe rvlet.java:267)
javax.servlet.http.HttpServlet.service(HttpServlet .java:717)
person.doGet(person.java:42)
person.doPost(person.java:49)
javax.servlet.http.HttpServlet.service(HttpServlet .java:637)
javax.servlet.http.HttpServlet.service(HttpServlet .java:717)

root cause

java.lang.NullPointerException
org.apache.jsp.jsp.output_jsp._jspService(output_j sp.java:73)
org.apache.jasper.runtime.HttpJspBase.service(Http JspBase.java:70)
javax.servlet.http.HttpServlet.service(HttpServlet .java:717)
org.apache.jasper.servlet.JspServletWrapper.servic e(JspServletWrapper.java:374)
org.apache.jasper.servlet.JspServlet.serviceJspFil e(JspServlet.java:342)
org.apache.jasper.servlet.JspServlet.service(JspSe rvlet.java:267)
javax.servlet.http.HttpServlet.service(HttpServlet .java:717)
person.doGet(person.java:42)
person.doPost(person.java:49)
javax.servlet.http.HttpServlet.service(HttpServlet .java:637)
javax.servlet.http.HttpServlet.service(HttpServlet .java:717)

note The full stack trace of the root cause is available in the Apache Tomcat/6.0.18 logs.

***atreyu*** · 09-24-2012

Originally Posted by Gizmo007

I have <hxxp></hxxp> tags wrapped around the body

Cancerous means you need "<html></html>" tags surrounding your code.

Edit: do you have a link to the page you got your sample from?

***atreyu*** · 09-24-2012

Originally Posted by Gizmo007

This JSP page works fine if I load into my php directory and run it off of apache/php instead of directly through Tomcat

Here is a copy of the error I am getting

I got your (slightly modified) code to work for me. I called it "javatest.jsp" and put in a "document root" of a fake webapp in my tomcat base dir, e.g.:

Code:

cp javatest.jsp /var/lib/tomcat/webapps/hello/

I had previously created the above "hello" subdir when first testing out java/tomcat stuff.

Then i made sure tomcat was running:

Code:

systemctl restart tomcat.service

(that's the systemd way of starting it...)

Then I called the page in a URL like this:

Code:

http://192.168.1.6:8080/hello/javatest.jsp

Here is the code, for reference. I don't think the code is your problem, though (unless it is the very first include line). it is more likely that the file is just in the wrong place.

Code:

<%@ page import="java.util.*" %>

<html>
<body>
 <p>&nbsp;</p>
 <div align="">
 <table border="0" cellpadding="0" cellspacing
 ="0" width="460" bgcolor="#999999">
 <tr>
 <td width="100%"><font size="6" color
 ="#800000">&nbsp;Date Example</font></td>
 </tr>
 <tr>
 <td width="100%"><b>&nbsp;Current Date
 and time is:&nbsp; <font color="#0000ff">
 <%= new java.util.Date() %>
 </font></b></td>
 </tr>
 </table>
 </center>
 </div>
 </body>
</html>

**Gizmo007** · 09-24-2012

ok thanks ! I got my JSP pages working. A downside to installing all the add-on packages is there are so many config files to mess with in apache. I found one setting that was still set to localhost instead of 192.168.0.15 (my linux server address) and changed it to what it should be. Also when I copied the servlet-api.jar file to my ROOT directory in Tomcat then everything starting working fine for me. Thanks everyone for the help. Not sure how I fixed it it, but it's fixed. I appreciate the help thank you !

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