Trying to run simple servlet - error
I am the first time user of Beas Weblogic & I am trying to run simple example
servlets from Weblogic Console. However, when I try to LoadServlets, I get an
error 'Property Change Error for Property "Load"; Unable to load servlet'
Is there anything I am missing? I'd appreciate any help.
Thx.
Ravi
Hi,
I have found out the cause. im pointing to the wrong classpath. it should be class12.zip instead of class111.zip, something i copied from my server running oracle8i.
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Hi,
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"http://java.sun.com/j2ee/dtds/web-app_2_2.dtd">
<web-app>
<servlet>
<servlet-name> HelloWorld </servlet-name>
<servlet-class> HelloWorld</servlet-class>
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<servlet-mapping>
<servlet-name> HelloWorld </servlet-name>
<url-pattern> HelloWorld </url-pattern>
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<welcome-file-list>
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How do i run a servlet??????
running servlets:i downloaded jsdk but how do i run a servlet? i got the error
C:\WINDOWS\Desktop>javac HTTPGetServlet.java
Exception in thread "main" java.lang.NoClassDefFoundError: com/sun/tools/javac/M
ain
when i tried to run my servlet, please help
thanksAs mentioned in another post in the thread, servlets run from within a web server that has pre-loaded the jvm and serves web requests. Often they are called 'sevlet containers' as they act like a wrapper program for the actual vm. Tomcat is such a web server, quite a popular one for running servlets, and is considered the reference implementation for a sevlet/jsp server. you can read up on it at...
http://jakarta.apache.org/tomcat/index.html
To get you started, this is what i did to set up tomcat. Im using RedHat Linux at home, so this may differ to what you have to do initially.
First, make sure you have at least the jsdk and jsdk ee installed and the appropiate JAVA_HOME and J2EE_HOME environment variables set.
I am using the Apache web server to handle web page requests on my box. If the request is for a context containing a servlet or jsp file (context is a tomcat term for a particular location or path in the url) then apache passes the request to tomcat via a apache module and a special protocol. Tomcat then runs the .class file or .jsp file, returns the output to apache which then returns the output back to the browser. So initially you should set up and have the apache web server running.
Next download and install the jserv or tomcat module for apache, which apache uses to communicate with tomcat via a special protocol, and the tomcat rpms from...
http://jakarta.apache.org/builds/jakarta-tomcat/release/v3.2.3/rpms/
...Im using 3.2.3 which works fine. you may try the later versions if you like.
Install the tomcat rpms. They should dump a whole lot of stuff in a /var/tomcat directry, including some nice sample and admin apps. if you had downloaded and installed the tomcat-manuals rpm you can find lots of helpful information in the /usr/doc/tomcat-{your version here}/ directry. This is what you should probably read through now!
Once that is done, its simply a matter of adding a reference in your httpd.conf file to the tomcat.conf file in the tomcat/conf dir (if you want to have complete control over the tomcat module and contexts) or tomcat-apache.conf (in the same directry) if youd like tomcat to handel its own configuration of apache. something like...
include /var/tomcat/conf/tomcat.conf
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Error when trying to run servlet
Hi
I have a servlet that I need to run as a cron job.When I give the path to the class file and use Java filename , I get the following error.
Is this because I dont have a main method.How could I run the servlet otherwise
Exception in thread "main" java.lang.NoSuchMethodError: main
Thanks
ArnHi,
I dont understand what you mean by "cron job".
In any case, servlets are not applications and cannot be executed with the 'java' executable command like a regular application. They never contain the 'main' method. When the servlet is called via HTML post command the servlet's doPost method is executed, if it is called via the HTML get command, the servlet's doGet method is executed.
Servlets are executed by some sort of web container (for instance Tomcat), and you can see their output when you open a web browser with the path to the servlet.
For instance if your Tomcat server is configured to port 8080 and your compiled servlet (i.e. MyServlet.class) is in C:/Tomcat/webapps/root/web-inf/classes/MyServlet.class
directory, then you can call the servlet with the following path from the browser
http://localhost:8080/servlet/MyServlet
(given that Tomcat is running, and the path to MyServlet is given in Tomcat's web.xml file).
I hope this helps,
Val.
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