Discussion :

[momjunior]

Bonjour

J'ai créé un projet Maven qui contient une page index.jsp et une servlet nommée Test. J'arrive à lancer l'application via l'url suivante:

http://localhost:8080/MavenWebApp/

Mais lorsque j''essaie d'accéder à la servlet via cette url:

http://localhost:8080/MavenWebApp/test

Je reçois ce message d'erreur:

Code :

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GRAVE: Exception lors de l'allocation pour la servlet [Test]
java.lang.ClassNotFoundException: org.Test
	at org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1344)
	at org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1172)
	at org.apache.catalina.core.DefaultInstanceManager.loadClass(DefaultInstanceManager.java:546)
	at org.apache.catalina.core.DefaultInstanceManager.loadClassMaybePrivileged(DefaultInstanceManager.java:527)
	at org.apache.catalina.core.DefaultInstanceManager.newInstance(DefaultInstanceManager.java:150)
	at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1044)
	at org.apache.catalina.core.StandardWrapper.allocate(StandardWrapper.java:773)
	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:133)
	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96)
	at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:493)
	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:140)
	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:81)
	at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:650)
	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:87)
	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:342)
	at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:800)
	at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66)
	at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:806)
	at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1498)
	at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
	at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
	at java.lang.Thread.run(Unknown Source)

Voici le code de la servlet:

Code :

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package org;
 
import java.io.IOException;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
 
/**
 * Servlet implementation class Test
 */
public class Test extends HttpServlet {
	private static final long serialVersionUID = 1L;
 
    /**
     * @see HttpServlet#HttpServlet()
     */
    public Test() {
        super();
        // TODO Auto-generated constructor stub
    }
 
	/**
         * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
         */
	protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		// TODO Auto-generated method stub
		response.getWriter().append("Served at: ").append(request.getContextPath());
	}
 
	/**
         * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
         */
	protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		// TODO Auto-generated method stub
		doGet(request, response);
	}
 
}

Voici le fichier web.xml:

Code XML :

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<!DOCTYPE web-app PUBLIC
 "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN"
 "http://java.sun.com/dtd/web-app_2_3.dtd" >
 
<web-app>
  <display-name>Archetype Created Web Application</display-name>
  <servlet>
  	<servlet-name>Test</servlet-name>
  	<display-name>Test</display-name>
  	<description></description>
  	<servlet-class>org.Test</servlet-class>
  </servlet>
  <servlet-mapping>
  	<servlet-name>Test</servlet-name>
  	<url-pattern>/test</url-pattern>
  </servlet-mapping>
 
 
</web-app>

Merci

[momjunior]

J'ai enfin trouvé la solution. Je suis tombé sur ça:

I had the same problem.

My solution is: When the project is created please create the java folder under src/main manually, it is because the maven-archetype-webapp doesn't create the src/main/java by default.

Before: src/main
After: src/main/java

image:java folder manually created

When the first step is ready then you can create all the servlets that you need, please make sure that you create all your classes and servlets under src/main/java.

The problem is because the servlet was created under src/main/resources that means that all your .java files was packaged as a resource and not as .class compiled.

Donc il fallait tout simplement créer le répertoire "java" dans src/main manuellement et y insérer toutes mes Servlets.