Bonjour,
sur le fichier web.xml j'ai déclarer une variable de servlet de la manière suivante
<servlet>
<servlet-name>firstServlet</servlet-name>
<servlet-class>com.formation.cours1.MyFirstServlet</servlet-class>
<init-param>
<param-name>servletAuther</param-name>
<param-value>igor</param-value>
</init-param>
</servlet>
sur ma servlet, j'ai essayé de récupérer la variable de la manière suivante dans la méthode doGet:
ServletContext context=getServletContext();
String author =context.getInitParameter("servletAuther");
Cela malheureusement me donne le crash suivant:
GRAVE: "Servlet.service()" pour la servlet personalInfoServlet a généré une exception
java.lang.NullPointerException
at javax.servlet.GenericServlet.getServletContext(GenericServlet.java:160)
at com.formation.cours1.PersonalInfoServlet.doGet(PersonalInfoServlet.java:26)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:627)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:269)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:172)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:117)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:108)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:174)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:879)
at org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:665)
at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:528)
at org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFollowerWorkerThread.java:81)
at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:689)
at java.lang.Thread.run(Unknown Source)
A vous..