how to fetch a value from persistence.xml to build.properties?

how to fetch a value from build.properties to persistence.xml?

• In our project I need to fetch some values from build.properties to persistence.xml. Please let me know if there is any possible way?

• Answer:

  For example: build.properties contains username = root password = shoot as properties then you could change the persistence.xml to have values like <username>@username@</username> <password value="@password@"/> then your build.xml should be something like this will work. <target name="replace"> <property file="build.properties"/> <replace file="persistence.xml" token="@username@" value="${username}"/> <replace file="persistence.xml" token="@password@" value="${password}"/> </target> Here $username and $password values are automatically identified by ant from the <property> tag and you could access values with key as a name.