Persistence.xml field values from properties file

Help, i would like to my persistence xml properties value reference to my db.properties file.

here's my db.properties file

jdbc.driver=com.mysql.jdbc.Driver
jdbc.url=jdbc:mysql://localhost:3306/apsas
jdbc.username=root
jdbc.password=password

and here's my current persistence.xml

<?xml version="1.0" encoding="UTF-8"?>
<persistence xmlns="http://java.sun.com/xml/ns/persistence"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://java.sun.com/xml/ns/persistence http://java.sun.com/xml/ns/persistence/persistence_2_0.xsd"
    version="2.0">
    <persistence-unit name="apsaspu" transaction-type="RESOURCE_LOCAL">
        <provider>
            org.hibernate.ejb.HibernatePersistence
        </provider>
        <properties>
            <property name="hibernate.connection.driver_class" value="com.mysql.jdbc.Driver" />
            <property name="hibernate.connection.url" value="jdbc:mysql://localhost:3306/apsas" />
            <property name="hibernate.connection.username" value="root" />
            <property name="hibernate.connection.password" value="password" />
            <property name="hibernate.dialect" value="org.hibernate.dialect.MySQLDialect" />
            <property name="hibernate.show_sql" value="true" />
            <property name="hibernate.hbm2ddl.auto" value="update" />
        </properties>
    </persistence-unit>
</persistence>

what i wanted to do is to set its property into like this

<?xml version="1.0" encoding="UTF-8"?>
<persistence xmlns="http://java.sun.com/xml/ns/persistence"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://java.sun.com/xml/ns/persistence http://java.sun.com/xml/ns/persistence/persistence_2_0.xsd"
    version="2.0">
    <persistence-unit name="apsaspu" transaction-type="RESOURCE_LOCAL">
        <provider>
            org.hibernate.ejb.HibernatePersistence
        </provider>
        <properties>
            <property name="hibernate.connection.driver_class" value="${jdbc.driver}" />
            <property name="hibernate.connection.url" value="${jdbc.url}" />
            <property name="hibernate.connection.username" value="${jdbc.username}" />
            <property name="hibernate.connection.password" value="${jdbc.password}" />
            <property name="hibernate.dialect" value="org.hibernate.dialect.MySQLDialect" />
            <property name="hibernate.show_sql" value="true" />
            <property name="hibernate.hbm2ddl.auto" value="update" />
        </properties>
    </persistence-unit>
</persistence>

question is how can i import the properties file into my persistence xml Advance thanks for those who will help me...