In this article, I will show How to create jar file using Graddle.
How to test the same jar file.
Tools Used :
1) eclipse version Luna 4.4.1.
2) Graddle 2.11
3) JDK 1.8
Simple Steps to be followed,
1) Create a Gradle project.
2) Modify the build.gradle file.
3) Add some java source and test classes.
4) Run and verify the jar file is created.
1) Create a Gradle project :
If you are completely new to Graddle and eclipse,
Pl. refer the link Graddle Hello World Using eclipse
I have created a Graddle project with name GraddleJarEmail.
2) Modify the build.gradle file :
Add jar file, versions and compatible version.
sourceCompatibility = 1.8
version = '1.0'
jar {
manifest {
attributes 'Implementation-Title': 'emailService',
'Implementation-Version': version
}
}
Then the jar will be created once we run the Graddle build,
with name emailService.jar.
build.gradle
/*
* This build file was auto generated by running the Gradle 'init' task
* by 'nallave' at '11/2/16 8:08 PM' with Gradle 2.11
*
* 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/2.11/userguide/tutorial_java_projects.html
*/
// Apply the java plugin to add support for Java
apply plugin: 'java'
apply plugin: 'eclipse'
sourceCompatibility = 1.8
version = '1.0'
jar {
manifest {
attributes 'Implementation-Title': 'emailService',
'Implementation-Version': version
}
}
// 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.
mavenCentral()
}
// In this section you declare the dependencies for your production and test code
dependencies {
compile group: 'commons-collections', name: 'commons-collections', version: '3.2'
testCompile group: 'junit', name: 'junit', version: '4.+'
}
3) Add some java source and test classes :
I have added simple java email service class, having simple method send(),
to send email to the toList users. Test class TestEmailService just to test the send() method.
EmailService.java
package com.devjavasource.graddle;
import java.util.List;
public class EmailService {
String send(){
return "Send email";
}
private String from;
private List toList;
private String subject;
private String body;
public String getFrom() {
return from;
}
public void setFrom(String from) {
this.from = from;
}
public List getToList() {
return toList;
}
public void setToList(List toList) {
this.toList = toList;
}
public String getSubject() {
return subject;
}
public void setSubject(String subject) {
this.subject = subject;
}
public String getBody() {
return body;
}
public void setBody(String body) {
this.body = body;
}
}
TestEmailService.java
package com.devjavasource.graddle;
import static org.junit.Assert.assertEquals;
import org.junit.Test;
public class TestEmailService {
@Test public void testSend() {
EmailService email = new EmailService();
assertEquals("Send email", email.send());
}
}
4) Run and verify the jar file is created :
We can either run from eclipse or command prompt.
Command to run Gradle build is Gradle build
We can run from eclipse,
Right click on Gradle.build file and Run As -> gradle build Gradle build
The out will be generated,
Out Put :
:compileJava :processResources UP-TO-DATE :classes :jar :assemble :compileTestJava :processTestResources UP-TO-DATE :testClasses :test :check :build BUILD SUCCESSFUL Total time: 1.68 secs
You can see the build results in build folder.
In side the build folder, you can see the jar file.
You can download complete project, Here
GraddleJarEmail
*** Venkat – Happy learning ****