How To Run A Struts2 Application Inside A JAR Using Spring Boot (with Embedded Tomcat)?

Apr 25, 2025 by ADMIN 88 views

How to run a Struts2 application inside a JAR using Spring Boot (with embedded Tomcat)

Introduction

In today's fast-paced digital landscape, legacy web applications built using outdated frameworks can pose significant challenges for developers. One such framework is Struts2, which has been widely used for building web applications. However, with the advent of modern frameworks like Spring Boot, developers often find themselves in a situation where they need to integrate their legacy Struts2 applications with the latest technologies. In this article, we will explore how to run a Struts2 application inside a JAR using Spring Boot with an embedded Tomcat server.

Prerequisites

Before we dive into the details, let's outline the prerequisites for this tutorial:

Java 8 or later: We will be using Java 8 or later for this tutorial, as it is the minimum requirement for Spring Boot.
Gradle 4 or later: We will be using Gradle 4 or later for building and managing our project.
Spring Boot 2 or later: We will be using Spring Boot 2 or later for this tutorial, as it provides the necessary features for embedding Tomcat.
Struts2 2.5 or later: We will be using Struts2 2.5 or later for this tutorial, as it is the latest version of the framework.

Setting up the Project

To set up the project, we will create a new Gradle project and add the necessary dependencies. Here's an example of how to do it:

plugins {
    id 'org.springframework.boot' version '2.5.3'
    id 'io.spring.dependency-management' version '1.0.11.RELEASE'
    id 'java'
}
group = 'com.example'
version = '0.0.1-SNAPSHOT'
sourceCompatibility = '1.8'
repositories {
mavenCentral()
}
dependencies {
implementation 'org.springframework.boot:spring-boot-starter-web'
implementation 'org.apache.struts:struts2-spring-plugin:2.5.22.1'
implementation 'org.apache.struts:struts2-core:2.5.22.1'
implementation 'org.apache.struts:struts2-servlet2.5-plugin:2.5.22.1'
implementation 'org.apache.struts:struts2-jsp:2.5.22.1'
implementation 'org.apache.struts:struts2-jsp:2.5.22.1'
implementation 'org.apache.struts:struts2-jsp:2.5.22.1'
implementation 'org.apache.struts:struts2-jsp:2.5.22.1'
implementation 'org.apache.struts:struts2-jsp:2.5.22.1'
implementation 'org.apache.struts:struts2-jsp:2.5.22.1'
implementation 'org.apache.struts:struts2-jsp:2.5.22.1'
implementation 'org.apache.struts:struts2-jsp:2.5.22.1'
implementation 'org.apache.struts:struts2-jsp:2.5.22.1'
implementation 'org.apache.struts:struts2-jsp:2.5.22.1'
implementation 'org.apache.struts:struts2-jsp:2.5.22.1'
implementation 'org.apache.struts:struts2-jsp:2.5.22.'
implementation 'org.apache.struts:struts2-jsp:2.5.22.1'
implementation 'org.apache.struts:struts2-jsp:2.5.22.1'
implementation 'org.apache.struts:struts2-jsp:2.5.22.1'
implementation 'org.apache.struts:struts2-jsp:2.5.22.1'
implementation 'org.apache.struts:struts2-jsp:2.5.22.1'
implementation 'org.apache.struts:struts2-jsp:2.5.22.1'
implementation 'org.apache.struts:struts2-jsp:2.5.22.1'
implementation 'org.apache.struts:struts2-jsp:2.5.22.1'
implementation 'org.apache.struts:struts2-jsp:2.5.22.1'
implementation 'org.apache.struts:struts2-jsp:2.5.22.1'
implementation 'org.apache.struts:struts2-jsp:2.5.22.1'
implementation 'org.apache.struts:struts2-jsp:2.5.22.1'
implementation 'org.apache.struts:struts2-jsp:2.5.22.1'
implementation 'org.apache.struts:struts2-jsp:2.5.22.1'
implementation 'org.apache.struts:struts2-jsp:2.5.22.1'
implementation 'org.apache.struts:struts2-jsp:2.5.22.1'
implementation 'org.apache.struts:struts2-jsp:2.5.22.1'
implementation 'org.apache.struts:struts2-jsp:2.5.22.1'
implementation 'org.apache.struts:struts2-jsp:2.5.22.1'
implementation 'org.apache.struts:struts2-jsp:2.5.22.1'
implementation 'org.apache.struts:struts2-jsp:2.5.22.1'
implementation 'org.apache.struts:struts2-jsp:2.5.22.1'
implementation 'org.apache.struts:struts2-jsp:2.5.22.1'
implementation 'org.apache.struts:struts2-jsp:2.5.22.1'
implementation 'org.apache.struts:struts2-jsp:2.5.22.1'
implementation 'org.apache.struts:struts2-jsp:2.5.22.1'
implementation 'org.apache.struts:struts2-jsp:2.5.22.1'
implementation 'org.apache.struts:struts2-jsp:2.5.22.1'
implementation 'org.apache.struts:struts2-jsp:2.5.22.1'
implementation 'org.apache.struts:struts2-jsp:2.5.22.1'
implementation 'org.apache.struts:struts2-jsp:2.5.22.1'
implementation 'org.apache.struts:struts2-jsp:2.5.22.1'
implementation 'org.apache.struts:struts2-jsp:2.5.22.1'
implementation 'org.apache.struts:struts2-jsp:2.5.22.1'
implementation 'org.apache.struts:struts2-jsp:2.5.22.1'
implementation 'org.apache.struts:struts2-jsp:2.5.22.1'
implementation 'org.apache.struts:struts2-jsp:2.5.22.1'
'org.apache.struts:struts2-jsp:2.5.22.1'
implementation 'org.apache.struts:struts2-jsp:2.5.22.1'
implementation 'org.apache.struts:struts2-jsp:2.5.22.1'
implementation 'org.apache.struts:struts2-jsp:2.5.22.1'
implementation 'org.apache.struts:struts2-jsp:2.5.22.1'
implementation 'org.apache.struts:struts2-jsp:2.5.22.1'
implementation 'org.apache.struts:struts2-jsp:2.5.22.1'
implementation 'org.apache.struts:struts2-jsp:2.5.22.1'
implementation 'org.apache.struts:struts2-jsp:2.5.22.1'
implementation 'org.apache.struts:struts2-jsp:2.5.22.1'
implementation 'org.apache.struts:struts2-jsp:2.5.22.1'
implementation 'org.apache.struts:struts2-jsp:2.5.22.1'
implementation 'org.apache.struts:struts2-jsp:2.5.22.1'
implementation 'org.apache.struts:struts2-jsp:2.5.22.1'
implementation 'org.apache.struts:struts2-jsp:2.5.22.1'
implementation 'org.apache.struts:struts2-jsp:2.5.22.1'
implementation 'org.apache.struts:struts2-jsp:2.5.22.1'
implementation 'org.apache.struts:struts2-jsp:2.5.22.1'
implementation 'org.apache.struts:struts2-jsp:2.5.22.1'
implementation 'org.apache.struts:struts2-jsp:2.5.22.1'
implementation 'org.apache.struts:struts2-jsp:2.5.22.1'
implementation 'org.apache.struts:struts2-jsp:2.5.22.1'
implementation 'org.apache.struts:struts2-jsp:2.5.22.1'
implementation 'org.apache.struts:struts2-jsp:2.5.22.1'
implementation 'org.apache.struts:struts2-jsp:2.5.22.1'
implementation 'org.apache.struts:struts2-jsp:2.5.22.1'
implementation 'org.apache.struts:struts2-jsp:2.5.22.1'
implementation 'org.apache.struts:struts2-jsp:2.5.22.1'
implementation 'org.apache.struts:struts2-jsp:2.5.22.1'
implementation 'org.apache.struts:struts2-j<br/>
Q&A
Q: What is the main goal of this article?
A: The main goal of this article is to provide a step-by-step guide on how to run a Struts2 application inside a JAR using Spring Boot with an embedded Tomcat server.
Q: What are the prerequisites for this tutorial?
A: The prerequisites for this tutorial are Java 8 or later, Gradle 4 or later, Spring Boot 2 or later, and Struts2 2.5 or later.
Q: How do I set up the project?
A: To set up the project, you need to create a new Gradle project and add the necessary dependencies. You can refer to the example provided in the article for more details.
Q: What are the dependencies required for this project?
A: The dependencies required for this project are Spring Boot, Struts2, and Tomcat. You can add these dependencies to your build.gradle file as shown in the article.
Q: How do I configure the Struts2 plugin in Spring Boot?
A: To configure the Struts2 plugin in Spring Boot, you need to add the following configuration to your application.properties file:
struts2.servlet.loadStrutsStaticResources = false
struts2.servlet.excludePatterns = /static/**
</code></pre>
<h3>Q: How do I configure the Tomcat server in Spring Boot?</h3>
<p>A: To configure the Tomcat server in Spring Boot, you need to add the following configuration to your application.properties file:</p>
<pre><code class="hljs">server.servlet.context-path = /
server.servlet.session-timeout = 30
server.servlet.session-cookie-name = JSESSIONID
</code></pre>
<h3>Q: How do I run the application?</h3>
<p>A: To run the application, you can use the following command:</p>
<pre><code class="hljs">./gradlew bootRun
</code></pre>
<h3>Q: How do I package the application as a JAR?</h3>
<p>A: To package the application as a JAR, you can use the following command:</p>
<pre><code class="hljs">./gradlew build
</code></pre>
<h3>Q: How do I run the application as a JAR?</h3>
<p>A: To run the application as a JAR, you can use the following command:</p>
<pre><code class="hljs">java -jar build/libs/myapp.jar
</code></pre>
<h3>Q: What are the benefits of running a Struts2 application inside a JAR using Spring Boot?</h3>
<p>A: The benefits of running a Struts2 application inside a JAR using Spring Boot include:</p>
<ul>
<li>Simplified deployment and management</li>
<li>Improved performance and scalability</li>
<li>Enhanced security and reliability</li>
<li>Easy integration with other Spring Boot features</li>
</ul>
<h3>Q: What are the challenges of running a Struts2 application inside a JAR using Spring Boot?</h3>
<p>A: The challenges of running a Struts2 application inside a JAR using Spring Boot include:</p>
<ul>
<li>Complexity of configuration and setup</li>
<li>Potential conflicts with other Spring Boot features</li>
<li>Limited support for Struts2-specific features</li>
</ul>
<h3>Q: How do I troubleshoot common issues?</h3>
<p>A: To troubleshoot common issues, you can refer to the following resources:</p>
<ul>
<li>Spring Boot documentation</li>
<li>Struts2 documentation</li>
<li>Gradle documentation</li>
<li>Stack Overflow and other online forums</li>
</ul>
<h3>Q: What are the best practices for running a Struts application inside a JAR using Spring Boot?</h3>
<p>A: The best practices for running a Struts2 application inside a JAR using Spring Boot include:</p>
<ul>
<li>Following the official documentation and guidelines</li>
<li>Using the latest versions of Spring Boot and Struts2</li>
<li>Configuring the application correctly</li>
<li>Testing the application thoroughly</li>
<li>Monitoring and troubleshooting the application regularly</li>
</ul>


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