Struts 2 - HelloWorld

Download Struts 2 from struts downloads, and unzip, for example, C:\struts-2.3.14. Create dynamic web project in Eclipse.

Web Application File Structure
/WebContent/
/WebContent/META-INF/
/WebContent/WEB-INF/
/WebContent/WEB-INF/classes/struts.xml
/WebContent/WEB-INF/lib/
/WebContent/WEB-INF/lib/minimum JARs + any plugin JARs + plugin dependencies
/WebContent/WEB-INF/web.xml

See the structure as below -

The following files are a minium requirement for your application.

Filename	Description
struts2-core.jar	Framework library itself, found in distribution root directory
xwork.jar	XWork 2 library on which Struts 2 is built (version 2.0 or later)
ognl.jar	Object Graph Navigation Language (OGNL), the expression language used throughout the framework
freemarker.jar	All UI tag templates are written in Freemarker (also a good option for your own views)
commons-logging.jar	Commons logging, which the framework uses to support transparently logging to either Log4J or JDK 1.4+
commons-fileupload.jar	The Commons FileUpload package makes it easy to add robust, high-performance, file upload capability to your servlets and web applications.
commons-io.jar	Commons IO is a library of utilities to assist with developing IO functionality.
web.xml	Java web application configuration file that defines the filters (and other components) for your web application
struts.xml	Framework configuration file that defines the actions, results, and interceptors for your application

Copy to the WEB-INF/lib directory

• the required JARs
• any Struts plugin JARs,
• any plugin dependencies.

Create ../WEB-INF/classes/struts.xml -

    
    
    
        
            /index.jsp
        
        
            /HelloWorld.jsp
        
     

Snip of web.xml -

    My Application
    
        struts2
        org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter
    
    
        struts2
        /*
    

Action Class HelloWorld -

package com.mqin.struts2.demo;

import com.opensymphony.xwork2.ActionSupport;

public class HelloWorld extends ActionSupport {

    public static final String MESSAGE = "Struts is up and running ...";

    public String execute() throws Exception {
        setMessage(MESSAGE);
        return SUCCESS;
    }

    private String message;

    public void setMessage(String message) {
        this.message = message;
    }

    public String getMessage() {
        return message;
    }
}

Running Result -