InOrder to Integrate Spring boot with the struts 2 follow the below Sample provided. This is a very basic project and gives you an understanding of the spring boot and Struts 2 Integration.
Create a Spring boot starter project with war packaging.
Maven Dependencies.
Add the Following dependencies to your maven project.
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-tomcat</artifactId>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>javax.servlet-api</artifactId>
</dependency>
<!-- https://mvnrepository.com/artifact/javax.servlet/jsp-api -->
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>jsp-api</artifactId>
<version>2.0</version>
<scope>provided</scope>
</dependency>
<!-- https://mvnrepository.com/artifact/javax.servlet/servlet-api -->
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>servlet-api</artifactId>
<version>2.5</version>
<scope>provided</scope>
</dependency>
<!-- https://mvnrepository.com/artifact/org.apache.struts/struts2-core -->
<dependency>
<groupId>org.apache.struts</groupId>
<artifactId>struts2-core</artifactId>
<version>2.5.26</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.apache.struts/struts2-spring-plugin -->
<dependency>
<groupId>org.apache.struts</groupId>
<artifactId>struts2-spring-plugin</artifactId>
<version>2.5.26</version>
</dependency>
<dependency>
<groupId>org.apache.struts</groupId>
<artifactId>struts2-java8-support-plugin</artifactId>
<version>2.5.2</version>
</dependency>
</dependencies>
Create the Action Class: GreetUserAction.java
package com.searchendeca.demo.action;
import com.opensymphony.xwork2.ActionSupport;
public class GreetUserAction extends ActionSupport {
private String message;
public String getMessage() {
return message;
}
public void setMessage(String message) {
this.message = message;
}
@Override
public String execute() throws Exception {
return SUCCESS;
}
}
This class should extend the ActionSupport class and has the default method as the execute.
Create Struts Configuration File: Struts2Configuration.java
package com.searchendeca.demo.config;
import org.apache.struts2.dispatcher.filter.StrutsPrepareAndExecuteFilter;
import org.springframework.boot.web.servlet.FilterRegistrationBean;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import javax.servlet.DispatcherType;
@Configuration
public class Struts2Configuration {
@Bean
public FilterRegistrationBean someFilterRegistration() {
FilterRegistrationBean registration = new FilterRegistrationBean();
registration.setFilter(new StrutsPrepareAndExecuteFilter());
registration.addUrlPatterns("*.action");
registration.setDispatcherTypes(DispatcherType.REQUEST, DispatcherType.FORWARD);
registration.setName("StrutsPrepareAndExecuteFilter");
return registration;
}
}
This is the place we filter the struts URL. In the above sample, we are allowing only URLs with the *.action.
Create Struts File: struts.xml
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE struts PUBLIC
"-//Apache Software Foundation//DTD Struts Configuration 2.5//EN"
"http://struts.apache.org/dtds/struts-2.5.dtd">
<struts>
<constant name="struts.devMode" value="true"/>
<package name="basicStruts2" extends="struts-default">
<action name="message" class="com.searchendeca.demo.action.GreetUserAction" method="execute">
<param name="message">Welcome to SearchEndeca</param>
<result name="success">/greetUser.jsp</result>
</action>
</package>
</struts>
In this File we register the action and map to the result. In the above example we are mapping the success result to the /greetUser. also sending the parameters message to display in the jsp.
Create Jsp: greetUser.jsp
<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
pageEncoding="ISO-8859-1"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
"http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>Greet User</title>
</head>
<body>
<center>
<h3>${message}</h3>
</center>
</body>
</html>
ServletInitializer Class: ServletInitializer.java
package com.searchendeca.demo;
import org.springframework.boot.builder.SpringApplicationBuilder;
import org.springframework.boot.web.servlet.support.SpringBootServletInitializer;
public class ServletInitializer extends SpringBootServletInitializer {
@Override
protected SpringApplicationBuilder configure(SpringApplicationBuilder application) {
return application.sources(SpringStrutsDemoApplication.class);
}
}
SpringBoot Application Class :SpringStrutsDemoApplication.java
package com.searchendeca.demo;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
@SpringBootApplication
public class SpringStrutsDemoApplication {
public static void main(String[] args) {
SpringApplication.run(SpringStrutsDemoApplication.class, args);
}
}
After this execute the command mvn : clean, package create the war file deploy it to either tomcat or the default server.
In-Browser Navigate to http://localhost:8080/SpringStrutsDemo/message.action
It Produces the above output.
This Project is available in Git
here.
Happy Learning!!!!
