in28minutes / javawebapplicationstepbystep

JSP Servlets Tutorial For Beginners - in 25 Steps

Java Web Application in 25 Easy Steps

Learn Java Web Application Development with JSPs and Servlets Easy!

Installing Eclipse and Java

https://github.com/in28minutes/SpringIn28Minutes/blob/master/InstallationGuide-JavaEclipseAndMaven_v2.pdf

Running Examples

• If you are downloading the zip file, unzip the file
• Open Command Prompt and Change directory to folder containing pom.xml
• Run command "mvn tomcat7:run"
• For help : user our installation guide - https://github.com/in28minutes/SpringIn28Minutes/blob/master/InstallationGuide-JavaEclipseAndMaven_v2.pdf

File wise Contents

• Step01.md : Up and running with a web app in Tomcat
• Step02.md : First JSP
• Step03.md : Adding a GET Parameter name
• Step04.md : Adding another Get Parameter Password
• Step05.md : Lets add a form
• Step06.md : New Form and doPost
• Step07.md : Adding Password, validation of userid/password
• Step08.md : Adding a TodoService and Todos to welcome.jsp
• Step09.md : Bit of Refactoring - Packages 9 days ago
• Step10.md : Redirect from One Servlet to another - New TodoServlet.
• Step11.md : First JSTL Tag : Using a Loop around todos
• Step12 : Difference between Session and Request Scopes
• Step13.md : Add a New Todo
• Step14.md : Delete Todo with equals and hashcode methods
• Step15.md : Adding webjars for jquery and bootstrap
• Step16 : Missing Step :) We want you to take a break. Nothing in here..
• Step17.md : updating Bootstrap to 3.3.6
• Step 18 (Code file missing) : Refactoring: list-todos.do,list-todos.jsp,ListTodosServlet. Refer Next Step for code.
• Step 19 (Code file missing) : Adding a Filter for More Security. Refer Next Step for code.
• Step20.md : Logout
• Step 21 : Theory : Understand Maven and Tomcat
• Step 22 : Theory : Servlet LifeCycle
• Step 23 : Theory : Model 1 and Model 2 MVC Architectures
• Step24.md : Moving Add Functionality to a New Page.
• Step25.md : Add Category Field
• Step26(Code file missing) : Format the jsps better. Refer Next Step for code.
• Step27.md : Jsp Fragments

Troubleshooting

• Refer our TroubleShooting Guide - https://github.com/in28minutes/in28minutes-initiatives/tree/master/The-in28Minutes-TroubleshootingGuide-And-FAQ

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javawebapplicationstepbystep's Issues

Step 12: Session Scope vs Request Scope is missing.

Hi,

Great course by the way. However, Step 12 is missing.

If you assign the task to me, I'm willing to contribute to this project by creating Step12.md.

Adrian

Error message while running tomcat7:run at very first step

Hello,

I got following error message while running tomcat7:run and now I am stuck at this point. Please help me out

tomcat7:run
SLF4J: Failed to load class "org.slf4j.impl.StaticLoggerBinder".
SLF4J: Defaulting to no-operation (NOP) logger implementation
SLF4J: See http://www.slf4j.org/codes.html#StaticLoggerBinder for further details.
Jan 31, 2019 1:01:03 AM org.apache.tomcat.util.modeler.Registry registerComponent
SEVERE: Error registering Tomcat:type=StringCache
sun.misc.InvalidJarIndexException: Invalid index
at sun.misc.URLClassPath$JarLoader.getResource(URLClassPath.java:1103)
at sun.misc.URLClassPath$JarLoader.getResource(URLClassPath.java:1013)
at sun.misc.URLClassPath$JarLoader.findResource(URLClassPath.java:983)
at sun.misc.URLClassPath.findResource(URLClassPath.java:188)
at java.net.URLClassLoader$2.run(URLClassLoader.java:569)
at java.net.URLClassLoader$2.run(URLClassLoader.java:567)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findResource(URLClassLoader.java:566)
at java.lang.ClassLoader.getResource(ClassLoader.java:1093)
at java.lang.ClassLoader.getResource(ClassLoader.java:1088)
at org.codehaus.plexus.classworlds.realm.ClassRealm.loadResourceFromParent(ClassRealm.java:483)
at org.codehaus.plexus.classworlds.strategy.SelfFirstStrategy.getResource(SelfFirstStrategy.java:68)
at org.codehaus.plexus.classworlds.realm.ClassRealm.getResource(ClassRealm.java:288)
at org.apache.tomcat.util.modeler.Registry.loadDescriptors(Registry.java:766)
at org.apache.tomcat.util.modeler.Registry.findDescriptor(Registry.java:833)
at org.apache.tomcat.util.modeler.Registry.findManagedBean(Registry.java:579)
at org.apache.tomcat.util.modeler.Registry.findManagedBean(Registry.java:886)
at org.apache.tomcat.util.modeler.Registry.registerComponent(Registry.java:730)
at org.apache.catalina.util.LifecycleMBeanBase.register(LifecycleMBeanBase.java:158)
at org.apache.catalina.core.StandardServer.initInternal(StandardServer.java:774)
at org.apache.catalina.util.LifecycleBase.init(LifecycleBase.java:102)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:139)
at org.apache.catalina.startup.Tomcat.start(Tomcat.java:341)
at org.apache.tomcat.maven.plugin.tomcat7.run.AbstractRunMojo.startContainer(AbstractRunMojo.java:1238)
at org.apache.tomcat.maven.plugin.tomcat7.run.AbstractRunMojo.execute(AbstractRunMojo.java:592)
at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(DefaultBuildPluginManager.java:137)
at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:210)
at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:156)
at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:148)
at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:117)
at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:81)
at org.apache.maven.lifecycle.internal.builder.singlethreaded.SingleThreadedBuilder.build(SingleThreadedBuilder.java:56)
at org.apache.maven.lifecycle.internal.LifecycleStarter.execute(LifecycleStarter.java:128)
at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:305)
at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:192)
at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:105)
at org.apache.maven.cli.MavenCli.execute(MavenCli.java:956)
at org.apache.maven.cli.MavenCli.doMain(MavenCli.java:288)
at org.apache.maven.cli.MavenCli.main(MavenCli.java:192)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:497)
at org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced(Launcher.java:289)
at org.codehaus.plexus.classworlds.launcher.Launcher.launch(Launcher.java:229)
at org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode(Launcher.java:415)
at org.codehaus.plexus.classworlds.launcher.Launcher.main(Launcher.java:356)

Jan 31, 2019 1:01:03 AM org.apache.catalina.util.LifecycleMBeanBase register
WARNING: Failed to register object [org.apache.tomcat.util.buf.StringCache@3eabe84a] with name [org.apache.tomcat.util.buf.StringCache@3eabe84a] during component initialisation
sun.misc.InvalidJarIndexException: Invalid index
at sun.misc.URLClassPath$JarLoader.getResource(URLClassPath.java:1103)
at sun.misc.URLClassPath$JarLoader.getResource(URLClassPath.java:1013)
at sun.misc.URLClassPath$JarLoader.findResource(URLClassPath.java:983)
at sun.misc.URLClassPath.findResource(URLClassPath.java:188)
at java.net.URLClassLoader$2.run(URLClassLoader.java:569)
at java.net.URLClassLoader$2.run(URLClassLoader.java:567)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findResource(URLClassLoader.java:566)
at java.lang.ClassLoader.getResource(ClassLoader.java:1093)
at java.lang.ClassLoader.getResource(ClassLoader.java:1088)
at org.codehaus.plexus.classworlds.realm.ClassRealm.loadResourceFromParent(ClassRealm.java:483)
at org.codehaus.plexus.classworlds.strategy.SelfFirstStrategy.getResource(SelfFirstStrategy.java:68)
at org.codehaus.plexus.classworlds.realm.ClassRealm.getResource(ClassRealm.java:288)
at org.apache.tomcat.util.modeler.Registry.loadDescriptors(Registry.java:766)
at org.apache.tomcat.util.modeler.Registry.findDescriptor(Registry.java:833)
at org.apache.tomcat.util.modeler.Registry.findManagedBean(Registry.java:579)
at org.apache.tomcat.util.modeler.Registry.findManagedBean(Registry.java:886)
at org.apache.tomcat.util.modeler.Registry.registerComponent(Registry.java:730)
at org.apache.catalina.util.LifecycleMBeanBase.register(LifecycleMBeanBase.java:158)
at org.apache.catalina.core.StandardServer.initInternal(StandardServer.java:774)
at org.apache.catalina.util.LifecycleBase.init(LifecycleBase.java:102)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:139)
at org.apache.catalina.startup.Tomcat.start(Tomcat.java:341)
at org.apache.tomcat.maven.plugin.tomcat7.run.AbstractRunMojo.startContainer(AbstractRunMojo.java:1238)
at org.apache.tomcat.maven.plugin.tomcat7.run.AbstractRunMojo.execute(AbstractRunMojo.java:592)
at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(DefaultBuildPluginManager.java:137)
at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:210)
at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:156)
at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:148)
at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:117)
at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:81)
at org.apache.maven.lifecycle.internal.builder.singlethreaded.SingleThreadedBuilder.build(SingleThreadedBuilder.java:56)
at org.apache.maven.lifecycle.internal.LifecycleStarter.execute(LifecycleStarter.java:128)
at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:305)
at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:192)
at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:105)
at org.apache.maven.cli.MavenCli.execute(MavenCli.java:956)
at org.apache.maven.cli.MavenCli.doMain(MavenCli.java:288)
at org.apache.maven.cli.MavenCli.main(MavenCli.java:192)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:497)
at org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced(Launcher.java:289)
at org.codehaus.plexus.classworlds.launcher.Launcher.launch(Launcher.java:229)
at org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode(Launcher.java:415)
at org.codehaus.plexus.classworlds.launcher.Launcher.main(Launcher.java:356)

Jan 31, 2019 1:01:03 AM org.apache.coyote.AbstractProtocol init
INFO: Initializing ProtocolHandler ["http-bio-8080"]
Jan 31, 2019 1:01:04 AM org.apache.tomcat.util.modeler.Registry registerComponent
SEVERE: Error registering Tomcat:type=ProtocolHandler,port=8080
sun.misc.InvalidJarIndexException: Invalid index
at sun.misc.URLClassPath$JarLoader.getResource(URLClassPath.java:1103)
at sun.misc.URLClassPath$JarLoader.getResource(URLClassPath.java:1013)
at sun.misc.URLClassPath$JarLoader.findResource(URLClassPath.java:983)
at sun.misc.URLClassPath.findResource(URLClassPath.java:188)
at java.net.URLClassLoader$2.run(URLClassLoader.java:569)
at java.net.URLClassLoader$2.run(URLClassLoader.java:567)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findResource(URLClassLoader.java:566)
at java.lang.ClassLoader.getResource(ClassLoader.java:1093)
at java.lang.ClassLoader.getResource(ClassLoader.java:1088)
at org.codehaus.plexus.classworlds.realm.ClassRealm.loadResourceFromParent(ClassRealm.java:483)
at org.codehaus.plexus.classworlds.strategy.SelfFirstStrategy.getResource(SelfFirstStrategy.java:68)
at org.codehaus.plexus.classworlds.realm.ClassRealm.getResource(ClassRealm.java:288)
at org.apache.tomcat.util.modeler.Registry.loadDescriptors(Registry.java:766)
at org.apache.tomcat.util.modeler.Registry.findDescriptor(Registry.java:833)
at org.apache.tomcat.util.modeler.Registry.findManagedBean(Registry.java:579)
at org.apache.tomcat.util.modeler.Registry.findManagedBean(Registry.java:886)
at org.apache.tomcat.util.modeler.Registry.registerComponent(Registry.java:730)
at org.apache.coyote.AbstractProtocol.init(AbstractProtocol.java:408)
at org.apache.coyote.http11.AbstractHttp11JsseProtocol.init(AbstractHttp11JsseProtocol.java:119)
at org.apache.catalina.connector.Connector.initInternal(Connector.java:981)
at org.apache.catalina.util.LifecycleBase.init(LifecycleBase.java:102)
at org.apache.catalina.core.StandardService.initInternal(StandardService.java:559)
at org.apache.catalina.util.LifecycleBase.init(LifecycleBase.java:102)
at org.apache.catalina.core.StandardServer.initInternal(StandardServer.java:814)
at org.apache.catalina.util.LifecycleBase.init(LifecycleBase.java:102)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:139)
at org.apache.catalina.startup.Tomcat.start(Tomcat.java:341)
at org.apache.tomcat.maven.plugin.tomcat7.run.AbstractRunMojo.startContainer(AbstractRunMojo.java:1238)
at org.apache.tomcat.maven.plugin.tomcat7.run.AbstractRunMojo.execute(AbstractRunMojo.java:592)
at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(DefaultBuildPluginManager.java:137)
at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:210)
at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:156)
at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:148)
at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:117)
at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:81)
at org.apache.maven.lifecycle.internal.builder.singlethreaded.SingleThreadedBuilder.build(SingleThreadedBuilder.java:56)
at org.apache.maven.lifecycle.internal.LifecycleStarter.execute(LifecycleStarter.java:128)
at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:305)
at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:192)
at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:105)
at org.apache.maven.cli.MavenCli.execute(MavenCli.java:956)
at org.apache.maven.cli.MavenCli.doMain(MavenCli.java:288)
at org.apache.maven.cli.MavenCli.main(MavenCli.java:192)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:497)
at org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced(Launcher.java:289)
at org.codehaus.plexus.classworlds.launcher.Launcher.launch(Launcher.java:229)
at org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode(Launcher.java:415)
at org.codehaus.plexus.classworlds.launcher.Launcher.main(Launcher.java:356)

Jan 31, 2019 1:01:04 AM org.apache.catalina.core.StandardService initInternal
SEVERE: Failed to initialize connector [Connector[HTTP/1.1-8080]]
org.apache.catalina.LifecycleException: Failed to initialize component [Connector[HTTP/1.1-8080]]
at org.apache.catalina.util.LifecycleBase.init(LifecycleBase.java:106)
at org.apache.catalina.core.StandardService.initInternal(StandardService.java:559)
at org.apache.catalina.util.LifecycleBase.init(LifecycleBase.java:102)
at org.apache.catalina.core.StandardServer.initInternal(StandardServer.java:814)
at org.apache.catalina.util.LifecycleBase.init(LifecycleBase.java:102)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:139)
at org.apache.catalina.startup.Tomcat.start(Tomcat.java:341)
at org.apache.tomcat.maven.plugin.tomcat7.run.AbstractRunMojo.startContainer(AbstractRunMojo.java:1238)
at org.apache.tomcat.maven.plugin.tomcat7.run.AbstractRunMojo.execute(AbstractRunMojo.java:592)
at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(DefaultBuildPluginManager.java:137)
at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:210)
at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:156)
at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:148)
at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:117)
at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:81)
at org.apache.maven.lifecycle.internal.builder.singlethreaded.SingleThreadedBuilder.build(SingleThreadedBuilder.java:56)
at org.apache.maven.lifecycle.internal.LifecycleStarter.execute(LifecycleStarter.java:128)
at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:305)
at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:192)
at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:105)
at org.apache.maven.cli.MavenCli.execute(MavenCli.java:956)
at org.apache.maven.cli.MavenCli.doMain(MavenCli.java:288)
at org.apache.maven.cli.MavenCli.main(MavenCli.java:192)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:497)
at org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced(Launcher.java:289)
at org.codehaus.plexus.classworlds.launcher.Launcher.launch(Launcher.java:229)
at org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode(Launcher.java:415)
at org.codehaus.plexus.classworlds.launcher.Launcher.main(Launcher.java:356)
Caused by: org.apache.catalina.LifecycleException: Protocol handler initialization failed
at org.apache.catalina.connector.Connector.initInternal(Connector.java:983)
at org.apache.catalina.util.LifecycleBase.init(LifecycleBase.java:102)
... 30 more
Caused by: sun.misc.InvalidJarIndexException: Invalid index
at sun.misc.URLClassPath$JarLoader.getResource(URLClassPath.java:1103)
at sun.misc.URLClassPath$JarLoader.getResource(URLClassPath.java:1013)
at sun.misc.URLClassPath$JarLoader.findResource(URLClassPath.java:983)
at sun.misc.URLClassPath.findResource(URLClassPath.java:188)
at java.net.URLClassLoader$2.run(URLClassLoader.java:569)
at java.net.URLClassLoader$2.run(URLClassLoader.java:567)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findResource(URLClassLoader.java:566)
at java.lang.ClassLoader.getResource(ClassLoader.java:1093)
at java.lang.ClassLoader.getResource(ClassLoader.java:1088)
at org.codehaus.plexus.classworlds.realm.ClassRealm.loadResourceFromParent(ClassRealm.java:483)
at org.codehaus.plexus.classworlds.strategy.SelfFirstStrategy.getResource(SelfFirstStrategy.java:68)
at org.codehaus.plexus.classworlds.realm.ClassRealm.getResource(ClassRealm.java:288)
at org.apache.tomcat.util.modeler.Registry.loadDescriptors(Registry.java:766)
at org.apache.tomcat.util.modeler.Registry.findDescriptor(Registry.java:833)
at org.apache.tomcat.util.modeler.Registry.findManagedBean(Registry.java:579)
at org.apache.tomcat.util.modeler.Registry.findManagedBean(Registry.java:886)
at org.apache.tomcat.util.modeler.Registry.registerComponent(Registry.java:730)
at org.apache.coyote.AbstractProtocol.init(AbstractProtocol.java:408)
at org.apache.coyote.http11.AbstractHttp11JsseProtocol.init(AbstractHttp11JsseProtocol.java:119)
at org.apache.catalina.connector.Connector.initInternal(Connector.java:981)
... 31 more

Jan 31, 2019 1:01:04 AM org.apache.catalina.core.StandardService startInternal
INFO: Starting service Tomcat
Jan 31, 2019 1:01:04 AM org.apache.catalina.core.StandardEngine startInternal
INFO: Starting Servlet Engine: Apache Tomcat/7.0.47
Jan 31, 2019 1:01:04 AM org.apache.tomcat.util.modeler.Registry registerComponent
SEVERE: Error registering Tomcat:type=Cache,host=localhost,context=/
sun.misc.InvalidJarIndexException: Invalid index
at sun.misc.URLClassPath$JarLoader.getResource(URLClassPath.java:1103)
at sun.misc.URLClassPath$JarLoader.getResource(URLClassPath.java:1013)
at sun.misc.URLClassPath$JarLoader.findResource(URLClassPath.java:983)
at sun.misc.URLClassPath.findResource(URLClassPath.java:188)
at java.net.URLClassLoader$2.run(URLClassLoader.java:569)
at java.net.URLClassLoader$2.run(URLClassLoader.java:567)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findResource(URLClassLoader.java:566)
at java.lang.ClassLoader.getResource(ClassLoader.java:1093)
at java.lang.ClassLoader.getResource(ClassLoader.java:1088)
at org.codehaus.plexus.classworlds.realm.ClassRealm.loadResourceFromParent(ClassRealm.java:483)
at org.codehaus.plexus.classworlds.strategy.SelfFirstStrategy.getResource(SelfFirstStrategy.java:68)
at org.codehaus.plexus.classworlds.realm.ClassRealm.getResource(ClassRealm.java:288)
at org.apache.tomcat.util.modeler.Registry.loadDescriptors(Registry.java:766)
at org.apache.tomcat.util.modeler.Registry.findDescriptor(Registry.java:833)
at org.apache.tomcat.util.modeler.Registry.findManagedBean(Registry.java:579)
at org.apache.tomcat.util.modeler.Registry.findManagedBean(Registry.java:886)
at org.apache.tomcat.util.modeler.Registry.registerComponent(Registry.java:730)
at org.apache.catalina.core.StandardContext.resourcesStart(StandardContext.java:5088)
at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5235)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1559)
at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1549)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at java.lang.Thread.run(Thread.java:745)

Jan 31, 2019 1:01:04 AM org.apache.catalina.core.StandardContext resourcesStart
SEVERE: Error starting static Resources
sun.misc.InvalidJarIndexException: Invalid index
at sun.misc.URLClassPath$JarLoader.getResource(URLClassPath.java:1103)
at sun.misc.URLClassPath$JarLoader.getResource(URLClassPath.java:1013)
at sun.misc.URLClassPath$JarLoader.findResource(URLClassPath.java:983)
at sun.misc.URLClassPath.findResource(URLClassPath.java:188)
at java.net.URLClassLoader$2.run(URLClassLoader.java:569)
at java.net.URLClassLoader$2.run(URLClassLoader.java:567)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findResource(URLClassLoader.java:566)
at java.lang.ClassLoader.getResource(ClassLoader.java:1093)
at java.lang.ClassLoader.getResource(ClassLoader.java:1088)
at org.codehaus.plexus.classworlds.realm.ClassRealm.loadResourceFromParent(ClassRealm.java:483)
at org.codehaus.plexus.classworlds.strategy.SelfFirstStrategy.getResource(SelfFirstStrategy.java:68)
at org.codehaus.plexus.classworlds.realm.ClassRealm.getResource(ClassRealm.java:288)
at org.apache.tomcat.util.modeler.Registry.loadDescriptors(Registry.java:766)
at org.apache.tomcat.util.modeler.Registry.findDescriptor(Registry.java:833)
at org.apache.tomcat.util.modeler.Registry.findManagedBean(Registry.java:579)
at org.apache.tomcat.util.modeler.Registry.findManagedBean(Registry.java:886)
at org.apache.tomcat.util.modeler.Registry.registerComponent(Registry.java:730)
at org.apache.catalina.core.StandardContext.resourcesStart(StandardContext.java:5088)
at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5235)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1559)
at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1549)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at java.lang.Thread.run(Thread.java:745)

Jan 31, 2019 1:01:04 AM org.apache.catalina.core.StandardContext startInternal
SEVERE: Error in resourceStart()
Jan 31, 2019 1:01:04 AM org.apache.catalina.core.StandardContext startInternal
SEVERE: Error getConfigured
Jan 31, 2019 1:01:04 AM org.apache.catalina.core.StandardContext startInternal
SEVERE: Context [] startup failed due to previous errors

Hey!! I like to contribute to this project , Could I??

Step 17: Session invalidate method missing

Bug:- src\main\java\in28minutes\login\LoginServlet.java

Issue:- The invalidate method is missing.

fix: just add request.getSession().invalidate() in the else part.

Hello, bro

Can I get your Email ? I first use Github

error 404 after running tomcat 7

Hi, I copied all code from step01, following the instructions in the tutorial, but it returned 404 on localhost;/8080, where i am running tomcat... is there any way to could fix it? Thanks in advance