Tomcat6 + Ubuntu + Servlet

Question

I am trying to make servlet.

I have installed tomcat6 on ubuntu with admin examples and docs. I am able to run the examples provided. But when i try to make my own servlet it doesnt work.

I did following steps

Under the ROOT i create folder with

-ROOT
----myapp
------WEB-INF
---------classes

I made two files one is index.html which have a button and action on form to call the servlet. Second is .java file. I compiled the .java file and .class is done. So now tree look like

-ROOT
----myapp
------index.html
------WEB-INF
---------classes
-----------TestServ.java
-----------TestServ.class

Now i open this in browser using http://localhost:8080/myapp

It shows up with index.html page with button. But when i click on the button it says

Error 404: http://localhost:8080/myapp/TestServ not found !!

I dont know where m going wrong. I have set the CATALINA_HOME too. But still this problem continue.

Answer 1

You need to create a web.xml in the WEB-INF directory, and define the servlet mapping in web.xml, so that the myapp/TestServ URL is forwarded to the TestServ servlet class.

Here is a page describing web.xml, and has the example and elements you need to set up. For your class, these elements will probably look something like this:

<servlet>
    <servlet-name>testServ</servlet-name>
    <servlet-class>TestServ</servlet-class>
</servlet>

<servlet-mapping>
     <!-- For any URL starting with /content/, the rewriter servlet will be called -->
     <servlet-name>testServ</servlet-name>
     <url-pattern>/TestServ</url-pattern>
</servlet-mapping>

Answer 2

You shouldn't be deploying any of your code under ROOT.

You shouldn't have any Java class in the default package. Try putting your TestServ.java in a package.

Your deployment should NOT include any .java files.

You've got to register your servlet properly in web.xml. Include a mapping to a particular URL.

Your best best is to create a WAR file named myapp.war, which includes WEB-INF/classes and WEB-INF/lib and a web.xml for your situation. Put that in the Tomcat /webapps and start the container. If you've registered your servlet properly you should be able to access it via http://localhost:8080/myapp/TestServ.

I'd read the deployment docs carefully.