Maven profiles and property substitution example

./pom.xml
./src/test/java/prismoskills/TestConfiguration.java
./src/test/resources/configuration.properties

1. src/test/java/prismoskills/TestConfiguration.java
   (This one just loads the configuration.properties file and prints it out).

   package prismoskills;
   
   import java.net.URL;
   
   import org.junit.Test;
   
   import com.google.common.base.Charsets;
   import com.google.common.io.Resources;
   
   public class TestConfiguration {
   
     @Test
     public void test() throws Exception {
         URL url = Resources.getResource("configuration.properties");
         String text = Resources.toString(url, Charsets.UTF_8);
         System.out.println("Properties read: \n" + text);
     }
   }
   

   
   
   
   
2. src/test/resources/configuration.properties
   (This is the properties file where we will substitute the properties with values from pom.xml)

   prop1=${prop1.val}
   prop2=${prop2.val}
   

   
   
   
3. pom.xml
   (This is the place where all the configuration for profiles and property substitution is there. So pay attention to this one.)

   <?xml version="1.0" encoding="UTF-8"?>
   <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
            xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
     <modelVersion>4.0.0</modelVersion>
   
     <groupId>prismoskills</groupId>
     <artifactId>property-substitution-example</artifactId>
     <version>1.0.0</version>
   
     <dependencies>
       <dependency>
         <groupId>com.google.guava</groupId>
         <artifactId>guava</artifactId>
         <version>19.0</version>
       </dependency>
       <dependency>
         <groupId>junit</groupId>
         <artifactId>junit</artifactId>
         <version>4.12</version>
         <scope>test</scope>
       </dependency>
     </dependencies>
   
     <!-- Declare two maven profiles here -->
     <profiles>
       <profile>
         <id>profile1</id>
         <properties>
           <prop1.val>1</prop1.val>
           <prop2.val>2</prop2.val>
         </properties>
       </profile>
       <profile>
         <id>profile2</id>
         <properties>
           <prop1.val>One</prop1.val>
           <prop2.val>Two</prop2.val>
         </properties>
       </profile>
     </profiles>
   
     <!-- Add configuration for property substitution -->
     <build>
       <testOutputDirectory>${basedir}/target/classes</testOutputDirectory>
       <filters>
         <filter>src/test/resources/configuration.properties</filter>
       </filters>
       <resources>
         <resource>
          <directory>src/test/resources</directory>
          <filtering>true</filtering>
         </resource>
       </resources>
     </build>
   
   </project>
   

1. mvn clean package
   
   -------------------------------------------------------
    T E S T S
   -------------------------------------------------------
   Running prismoskills.TestConfiguration
   Properties read:
   prop1=${prop1.val}
   prop2=${prop2.val}
   Tests run: 1, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 0.176 sec
   

2. mvn clean -Pprofile1 package
   
   -------------------------------------------------------
    T E S T S
   -------------------------------------------------------
   Running prismoskills.TestConfiguration
   Properties read:
   prop1=1
   prop2=2
   Tests run: 1, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 0.175 sec
   

3. mvn clean -Pprofile2 package
   
   -------------------------------------------------------
    T E S T S
   -------------------------------------------------------
   Running prismoskills.TestConfiguration
   Properties read:
   prop1=One
   prop2=Two
   Tests run: 1, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 0.169 sec