[Note] Struts2 environment construction using Gradle in Eclipse
【Overview】
Build an environment for Struts2 with the Gradle project in Eclipse. (For some reason, I got a prefix = "s" related error from the dynamic web project and it didn't work, so I used the Gradle project)
- It may be necessary to install the Gradle plugin or Tomcat.
【Method】
** ① Create a Gradle project. ** **
The project name is appropriate (Struts2_gradle in this case), and click the "Finish" button.
** ② Make the folder structure of the dynamic project. ** **
Right-click the created Struts2_gradle → click "Properties".
Click "Project Facets" from the list on the left, then click "Convert to Facet Form ...".
Check "Dynamic Web Module" and click "OK".
** ③ Rewrite build.gradle. ** ** Rewrite "build.gradle" existing in Struts2_gradle project as follows.
build.gradle
/*
* This build file was auto generated by running the Gradle 'init' task
* by 'nobu' at '17/06/18 8:36' with Gradle 2.14.1
*
* This generated file contains a sample Java project to get you started.
* For more details take a look at the Java Quickstart chapter in the Gradle
* user guide available at https://docs.gradle.org/2.14.1/userguide/tutorial_java_projects.html
*/
// Apply the java plugin to add support for Java
apply plugin: 'java'
// In this section you declare where to find the dependencies of your project
repositories {
// Use 'jcenter' for resolving your dependencies.
// You can declare any Maven/Ivy/file repository here.
jcenter()
}
// In this section you declare the dependencies for your production and test code
dependencies {
// The production code uses the SLF4J logging API at compile time
compile 'org.slf4j:slf4j-api:1.7.21'
// Declare the dependency for your favourite test framework you want to use in your tests.
// TestNG is also supported by the Gradle Test task. Just change the
// testCompile dependency to testCompile 'org.testng:testng:6.8.1' and add
// 'test.useTestNG()' to your build script.
testCompile 'junit:junit:4.12'
compile "org.apache.struts:struts2-core:2.3.15.1"
compile "javax.servlet:javax.servlet-api:3.1.0"
}
task copyDependencies(type:Copy) {
copy {
from configurations.runtime
into 'WebContent/WEB-INF/lib'
}
}
** ④ Add the library. ** ** Right-click on the Struts2_gradle project → click “Gradle” → click “Refresh Gradle Project”.
** ⑤ Create a folder / file as shown below. ** **
Folder structure
Struts_gradle
├── build.gradle
├── src
│ └── main
│ └── java
│ └── com
│ └── tutorialspoint
│ └── struts2
│ └── HelloWorldAction.java
└── WebContent
├── HelloWorld.jsp
├── index.jsp
└── WEB-INF
├── logging.properties
├── web.xml
└── classes
└── struts.xml
** ⑥ Rewrite the contents of the file. ** **
HelloWorldAction.java
package com.tutorialspoint.struts2;
public class HelloWorldAction {
private String name;
public String execute() throws Exception {
return "success";
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
}
HelloWorld.jsp
<%@ page contentType="text/html; charset=UTF-8" %>
<%@ taglib prefix="s" uri="/struts-tags" %>
<html>
<head>
<title>Hello World</title>
</head>
<body>
Hello World, <s:property value="name"/>
</body>
</html>
index.jsp
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<%@ taglib prefix="s" uri="/struts-tags" %>
<!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=UTF-8">
<title>Hello World</title>
</head>
<body>
<h1>Hello World From Struts2</h1>
<form action="hello">
<label for="name">Please enter your name</label><br/>
<input type="text" name="name" />
<input type="submit" value="Say Hello" />
</form>
</body>
</html>
logging.properties
org.apache.catalina.core.ContainerBase.[Catalina].level = INFO
org.apache.catalina.core.ContainerBase.[Catalina].handlers = \
java.util.logging.ConsoleHandler
web.xml
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns="http://java.sun.com/xml/ns/javaee"
xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee
http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"
id="WebApp_ID" version="3.0">
<display-name>Struts2</display-name>
<welcome-file-list>
<welcome-file>index.jsp</welcome-file>
</welcome-file-list>
<filter>
<filter-name>struts2</filter-name>
<filter-class>
org.apache.struts2.dispatcher.FilterDispatcher
</filter-class>
</filter>
<filter-mapping>
<filter-name>struts2</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
</web-app>
struts.xml
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE struts PUBLIC
"-//Apache Software Foundation//DTD Struts Configuration 2.0//EN"
"http://struts.apache.org/dtds/struts-2.0.dtd ">
<struts>
<constant name="struts.devMode" value="true" />
<package name="helloworld" extends="struts-default">
<action name="hello"
class="com.tutorialspoint.struts2.HelloWorldAction"
method="execute">
<result name="success">/HelloWorld.jsp</result>
</action>
</package>
</struts>
** ⑦ Execute the project. ** **
Right-click Struts2_gradle → click "Run" → "Run on Server".
Then the following screen will appear.
[WAR file]
I uploaded the WAR file of the project created this time to GitHub. GitHub_nobu1234(Struts_gradle)
[Reference site]
tutorialspoint_Struts2 → Contents of Java file and xml file Try Struts2 (1) → Add Struts2 library to build.gradle Copy the dependent library with Gradle → How to add the library to WEB-INF / lib [Note!] Make a WAR with Gradle → Add servlet-api to build.gradle due to Servlet related error in jsp file
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