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How to run main method using Maven 

Fang
Joined:
08/13/2009
Posts:
164

February 16, 2012 12:27:55    Last update: February 16, 2012 12:34:58
Here are some ways to run a main method using Maven:
  1. Use the exec plugin: 
    mvn exec:java -Dexec.mainClass="com.example.App"

    or, with arguments: 
    mvn exec:java -Dexec.mainClass="com.example.App" -Dexec.args="arg1 'arg 2' 'arg-\"3'"

  2. Attach it to a build phase with the build element: 
    <build>  
    <plugins>  
	<plugin>  
	    <groupId>org.codehaus.mojo</groupId>  
	    <artifactId>exec-maven-plugin</artifactId>  
	    <version>1.2.1</version>  
	    <executions>  
		<execution>  
		    <phase>test</phase>  
		    <goals>  
			<goal>java</goal>  
		    </goals>  
		    <configuration>  
			<mainClass>com.example.App</mainClass>  
			<arguments>  
			    <argument>arg1</argument>  
			    <argument>arg 2</argument>  
			    <argument>'arg" 3'</argument>  
			</arguments>  
		    </configuration>  
		</execution>  
	    </executions>  
	</plugin>  
    </plugins>  
</build>

  3. If you want to run main from Maven, it's probably just some test code. You are better off just to write a test case, or call the main method from a test class: 
    package com.example;

import junit.framework.Test;
import junit.framework.TestCase;
import junit.framework.TestSuite;

/**
 * Unit test for simple App.
 */
public class AppTest 
    extends TestCase
{
    /**
     * Create the test case
     *
     * @param testName name of the test case
     */
    public AppTest( String testName )
    {
        super( testName );
    }

    /**
     * @return the suite of tests being tested
     */
    public static Test suite()
    {
        return new TestSuite( AppTest.class );
    }

    /**
     * Rigourous Test :-)
     */
    public void testApp()
    {
        App.main(new String[] {"arg1", "arg 2", "'arg-3\""});
    }
}

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