Best Of Hello World

Apache Wicket is a lightweight component-based web application framework for Java. This document explains how to write the first program in Apache Wicket and run it.

• Prerequisite

  For Apache Wicket to run, first you will need to install JDK – Java Development Kit. And for building the application you will need to install Maven. To run an application you need any web server or application server. Here we are using JBoss Application Server. The Apache Wicket version used is Wicket-6.15.0 and Eclipse version used is Eclipse Juno v4.2.

• Now Run the application with JBoss Application Server. The Application will display a message Hello World on the screen.

• Apache Wicket Hello World Program

  Once the JDK and Maven setup is done, create apache-wicket directory in C drive. Go to command prompt, change the directory to C:\apache-wicket and run below code.

          mvn archetype:generate -DarchetypeGroupId=org.apache.wicket -DarchetypeArtifactId=wicket-archetype-quickstart -DarchetypeVersion=6.15.0 -DgroupId=com.example -DartifactId=myproject -DarchetypeRepository=https://repository.apache.org/ -DinteractiveMode=false
          

  

  The above line will create a project structure in the directory C:\apache-wicket. Once executed successfully BUILD SUCCESS message will be displayed on the console.

  

  Now open Eclipse IDE. Give the folder path C:\apache-wicket in eclipse workspace.

  

  Import the project created with Maven into eclipse workspace. Use eclipse menu File -> Import.. to import the source code and available for editing.

  

  Browse the folder in root directory C:\apache-wicket. The project named myproject will be listed in Projects, showing pom.xml maven build file. Click the Finish button to complete the import.

  

  The project structure will be created in eclipse, Project Explorer.

  

  Now write code for first apache wicket program inside package com.example.

  HelloWorld.java

          package com.example;
  
          import org.apache.wicket.markup.html.WebPage;
          import org.apache.wicket.markup.html.basic.Label;
  
          public class HelloWorld extends WebPage
          {
              public HelloWorld()
              {
                  add(new Label("message", "Hello World!"));
              }
          }
          

  HelloWorld.html

      
           
                 
                 Apache Wicket Hello World
           
           
                 <span>Message goes here</span>
           
      
  

  Now edit code for below files.

  WicketApplication.java

          package com.example;
  
          import org.apache.wicket.markup.html.WebPage;
          import org.apache.wicket.protocol.http.WebApplication;
  
          public class WicketApplication extends WebApplication
          {
              /**
              * @see org.apache.wicket.Application#getHomePage()
              */
              @Override
              public Class<? extends WebPage> getHomePage()
              {
                  return HelloWorld.class;
              }
          }
          

  Web.xml

  
  
     ApacheWicketExample
     
        wicket.myproject
        org.apache.wicket.protocol.http.WicketFilter
        
           applicationClassName
           com.example.WicketApplication
        
     
     
        wicket.myproject
        /*
     
  
  

  Now Run the application with JBoss Application Server. The Application will display a message Hello World on the screen.

  

Find the Source Code on GitHub: Apache Wicket.