I would like to know how to access to an environment variable in Spring. For example I would like to use some environment variable in order to set the url property:

Code:
<bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource"> 
      <property name="driverClassName"><value>org.hsqldb.jdbcDriver</value></property> 
      <property name="url"> 
        <value>jdbc&#58;hsqldb&#58;P&#58;/springapp/v6/springapp/db/test</value> 
      </property> 
    </bean>
but I don't know which environment variables are accepted by Spring configuration files and how to use them (syntax), for example: ${user.home}, $HOME, etc. Any way are there any Spring Environment variables, could be used on the Spring configuration files.

Thanks in advance,

David Leal