This program is written in struts and I couldn't find the answer anywhere in stackoverflow. While running the program , it is giving 'nullpointerexception' .This is a simple struts login program created in netbeans enviornment.
The code is as follows:
What I have tried:
web.xml
-------
***
*
<welcome-file-list>
<welcome-file>login.jsp
*
login.jsp
---------
<%@taglib uri="/WEB-INF/struts-html.tld" prefix="html" %>
<html>
<head>
<title>Login Page</title>
</head>
<body>
<html:errors/>
<html:form action="/Login">
User Name :<html:text name="LoginForm" property="userName"/>
Password :<html:password name="LoginForm" property="password"/>
<html:submit value="Login" />
</html:form>
</body>
</html>
struts-config.xml
=================
<struts-config>
<form-beans>
<form-bean name="LoginForm" type="com.vaannila.LoginForm"/>
</form-beans>
<action-mappings>
<action input="/login.jsp" name="LoginForm" path="/Login" scope="session" type="com.vaannila.LoginAction">
<forward name="success" path="/success.jsp">
<forward name="failure" path="/failure.jsp">
LoginForm.java
--------------
public class LoginForm extends ActionForm{
private String userName;
private String password;
public void setuserName(String user)
{
this.userName=user;
}
public String getuserName()
{
return userName;
}
public void setpassword(String pass)
{
this.password=pass;
}
public String getpassword()
{
return password;
}
public ActionErrors validate(ActionMapping mapping, HttpServletRequest request) {
ActionErrors errors = new ActionErrors();
if (userName == null || userName.length() < 1) {
errors.add("userName", new ActionMessage("error.userName.required"));
}
if (password == null || password.length() < 1) {
errors.add("password", new ActionMessage("error.password.required"));
}
return errors;
}
ApplicationResource.properties
------------------------------
error.userName.required = User Name is required.
error.password.required = Password is required.
LoginAction.java
----------------
public class LoginAction extends org.apache.struts.action.Action {
private final static String SUCCESS = "success";
private final static String FAILURE = "failure";
public ActionForward execute(ActionMapping mapping, ActionForm form, HttpServletRequest request, HttpServletResponse response) throws Exception {
LoginForm loginForm = (LoginForm) form;
if (loginForm.getUserName().equals(loginForm.getPassword())) {
return mapping.findForward(SUCCESS);
} else {
return mapping.findForward(FAILURE);
}
}
}
HTTP Status 500 - Internal Server Error
________________________________________
type Exception report
messageInternal Server Error
descriptionThe server encountered an internal error that prevented it from fulfilling this request.
exception
javax.servlet.ServletException: java.lang.NullPointerException
root cause
java.lang.NullPointerException
note : The full stack traces of the exception and its root causes are available in the GlassFish Server Open Source Edition 4.1 logs.
________________________________________
GlassFish Server Open Source Edition 4.1
stacktrace
----------
Launching GlassFish on Felix platform
Aug 09, 2016 11:16:34 AM com.sun.enterprise.glassfish.bootstrap.osgi.BundleProvisioner createBundleProvisioner
INFO: Create bundle provisioner class = class com.sun.enterprise.glassfish.bootstrap.osgi.BundleProvisioner.
Aug 09, 2016 11:16:34 AM com.sun.enterprise.glassfish.bootstrap.osgi.BundleProvisioner$DefaultCustomizer getLocations
WARNING: Skipping entry because it is not an absolute URI.
Aug 09, 2016 11:16:34 AM com.sun.enterprise.glassfish.bootstrap.osgi.BundleProvisioner$DefaultCustomizer getLocations
WARNING: Skipping entry because it is not an absolute URI.
Registered com.sun.enterprise.glassfish.bootstrap.osgi.EmbeddedOSGiGlassFishRuntime@8bf20b in service registry.
Found populator: com.sun.enterprise.v3.server.GFDomainXml
#!## LogManagerService.postConstruct : rootFolder=C:\Program Files\glassfish-4.1\glassfish
#!## LogManagerService.postConstruct : templateDir=C:\Program Files\glassfish-4.1\glassfish\lib\templates
#!## LogManagerService.postConstruct : src=C:\Program Files\glassfish-4.1\glassfish\lib\templates\logging.properties
#!## LogManagerService.postConstruct : dest=C:\Users\OM\AppData\Roaming\NetBeans\8.0.1\config\GF_4.1\domain1\config\logging.properties
Info: Running GlassFish Version: GlassFish Server Open Source Edition 4.1 (build 13)
Info: Server log file is using Formatter class: com.sun.enterprise.server.logging.ODLLogFormatter
Info: Realm [admin-realm] of classtype [com.sun.enterprise.security.auth.realm.file.FileRealm] successfully created.
Info: Realm [file] of classtype [com.sun.enterprise.security.auth.realm.file.FileRealm] successfully created.
Info: Realm [certificate] of classtype [com.sun.enterprise.security.auth.realm.certificate.CertificateRealm] successfully created.
Info: Registered org.glassfish.ha.store.adapter.cache.ShoalBackingStoreProxy for persistence-type = replicated in BackingStoreFactoryRegistry
Info: Authorization Service has successfully initialized.
Info: Grizzly Framework 2.3.15 started in: 31ms - bound to [/0.0.0.0:8080]
Info: Grizzly Framework 2.3.15 started in: 0ms - bound to [/0.0.0.0:8181]
Info: Grizzly Framework 2.3.15 started in: 0ms - bound to [/0.0.0.0:4848]
Info: Grizzly Framework 2.3.15 started in: 0ms - bound to [/0.0.0.0:3700]
Info: visiting unvisited references
Info: Java security manager is disabled.
Info: Entering Security Startup Service.
Info: Loading policy provider com.sun.enterprise.security.provider.PolicyWrapper.
Info: Security Service(s) started successfully.
Info: Created HTTP listener http-listener-1 on host/port 0.0.0.0:8080
Info: Created HTTP listener http-listener-2 on host/port 0.0.0.0:8181
Info: Created HTTP listener admin-listener on host/port 0.0.0.0:4848
Info: Created virtual server server
Info: Created virtual server __asadmin
Info: Setting JAAS app name glassfish-web
Info: Virtual server server loaded default web module
Info: visiting unvisited references
Info: visiting unvisited references
Info: visiting unvisited references
Info: visiting unvisited references
Info: visiting unvisited references
Info: visiting unvisited references
Info: visiting unvisited references
Info: visiting unvisited references
Info: visiting unvisited references
Info: visiting unvisited references
Info: visiting unvisited references
Info: visiting unvisited references
Info: visiting unvisited references
Info: visiting unvisited references
Info: visiting unvisited references
Info: visiting unvisited references
Info: visiting unvisited references
Info: visiting unvisited references
Info: visiting unvisited references
Info: visiting unvisited references
Info: visiting unvisited references
Info: visiting unvisited references
Info: Initializing Mojarra 2.2.7 ( 20140610-1547 https://svn.java.net/svn/mojarra~svn/tags/2.2.7@13362) for context '/login'
Info: Create ActionListener wrapping instance of type 'com.sun.faces.application.ActionListenerImpl'
Info: HV000001: Hibernate Validator 5.0.0.Final
Info: Loading chain catalog from jar:file:/C:/Users/OM/Documents/NetBeansProjects/login/build/web/WEB-INF/lib/struts-core-1.3.10.jar!/org/apache/struts/chain/chain-config.xml
Info: Tiles definition factory loaded for module ''.
Info: Loading validation rules file from '/WEB-INF/validator-rules.xml'
Info: Loading validation rules file from '/WEB-INF/validation.xml'
Info: Loading application [login] at [/login]
Info: Loading application login done in 7,785 ms
Info: GlassFish Server Open Source Edition 4.1 (13) startup time : Felix (7,304ms), startup services(8,352ms), total(15,656ms)
Info: Grizzly Framework 2.3.15 started in: 0ms - bound to [/0.0.0.0:7676]
Info: Registered com.sun.enterprise.glassfish.bootstrap.osgi.EmbeddedOSGiGlassFishImpl@1b88914 as OSGi service registration: org.apache.felix.framework.ServiceRegistrationImpl@11a03bf.
Info: JMXStartupService has started JMXConnector on JMXService URL service:jmx:rmi://niit-PC:8686/jndi/rmi://niit-PC:8686/jmxrmi
Info: Created HTTP listener http-listener-1 on host/port 0.0.0.0:8080
Info: Grizzly Framework 2.3.15 started in: 0ms - bound to [/0.0.0.0:8080]
Info: Created HTTP listener http-listener-2 on host/port 0.0.0.0:8181
Info: Grizzly Framework 2.3.15 started in: 0ms - bound to [/0.0.0.0:8181]
Info: Tiles definition factory found for request processor ''.
Warning: Form 'LoginForm' not found for locale 'en_US'
Warning: Resource org/apache/struts/action/ActionResources_en_US.properties Not Found.
Warning: Resource org/apache/struts/action/ActionResources_en.properties Not Found.
Warning: Unhandled Exception thrown: class java.lang.NullPointerException
Warning: StandardWrapperValve[action]: Servlet.service() for servlet action threw exception
java.lang.NullPointerException
at com.vaannila.LoginAction.execute(LoginAction.java:26)
at org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:425)
at org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:228)
at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1913)
at org.apache.struts.action.ActionServlet.doPost(ActionServlet.java:462)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:707)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:790)
at org.apache.catalina.core.StandardWrapper.service(StandardWrapper.java:1682)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:318)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:160)
at org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:734)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:673)
at com.sun.enterprise.web.WebPipeline.invoke(WebPipeline.java:99)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:174)
at org.apache.catalina.connector.CoyoteAdapter.doService(CoyoteAdapter.java:415)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:282)
at com.sun.enterprise.v3.services.impl.ContainerMapper$HttpHandlerCallable.call(ContainerMapper.java:459)
at com.sun.enterprise.v3.services.impl.ContainerMapper.service(ContainerMapper.java:167)
at org.glassfish.grizzly.http.server.HttpHandler.runService(HttpHandler.java:201)
at org.glassfish.grizzly.http.server.HttpHandler.doHandle(HttpHandler.java:175)
at org.glassfish.grizzly.http.server.HttpServerFilter.handleRead(HttpServerFilter.java:235)
at org.glassfish.grizzly.filterchain.ExecutorResolver$9.execute(ExecutorResolver.java:119)
at org.glassfish.grizzly.filterchain.DefaultFilterChain.executeFilter(DefaultFilterChain.java:284)
at org.glassfish.grizzly.filterchain.DefaultFilterChain.executeChainPart(DefaultFilterChain.java:201)
at org.glassfish.grizzly.filterchain.DefaultFilterChain.execute(DefaultFilterChain.java:133)
at org.glassfish.grizzly.filterchain.DefaultFilterChain.process(DefaultFilterChain.java:112)
at org.glassfish.grizzly.ProcessorExecutor.execute(ProcessorExecutor.java:77)
at org.glassfish.grizzly.nio.transport.TCPNIOTransport.fireIOEvent(TCPNIOTransport.java:561)
at org.glassfish.grizzly.strategies.AbstractIOStrategy.fireIOEvent(AbstractIOStrategy.java:112)
at org.glassfish.grizzly.strategies.WorkerThreadIOStrategy.run0(WorkerThreadIOStrategy.java:117)
at org.glassfish.grizzly.strategies.WorkerThreadIOStrategy.access$100(WorkerThreadIOStrategy.java:56)
at org.glassfish.grizzly.strategies.WorkerThreadIOStrategy$WorkerThreadRunnable.run(WorkerThreadIOStrategy.java:137)
at org.glassfish.grizzly.threadpool.AbstractThreadPool$Worker.doWork(AbstractThreadPool.java:565)
at org.glassfish.grizzly.threadpool.AbstractThreadPool$Worker.run(AbstractThreadPool.java:545)
at java.lang.Thread.run(Thread.java:745)
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