Using variables in pom.xml

Question

I want to use a variable which has different values in the properties file depending on the environment. I want to use that variable in my pom.xml.

Answer 1

You are looking for Maven Resource Filtering

There are 3 steps to follow when using resource filtering:

Step 1:

Add a set of appropriate entries in your pom and include the variables you need in a list of :

    Dev
    
        dev.proxy.host
        1234
    


    QA
    
        QA.PROXY.NET
        8888
    


    Prod
    
        true
    
    
        PROD.PROXY.NET
        8080
    

Notice that the Prod profile has been tagged: .

Step 2:

Within the properties file, use pom-style variable demarcation to add variable value placeholders, matching the tag names used in the pom:

proxyServer=${proxyServer}
proxyPort=${proxyPort}

Step 3:

Within the pom's section, add a entry (assuming that your properties are in the src/main/resources directory), include a tag, and set the value to: true:

    
        src/main/resources
        true
        
            settings.properties
        
    

Then, when you run your Maven build, the demarcated property values will be replaced with the values that are defined in the pom entries.