Reference java env variable in spring config

How to reference java environment variable when using spring config

For example:

Using Tomcat server, ${catalina.home} is one of the system variable provided by Tomcat

In abc.properties file,

test.ref1=${catalina.home}

In context.xml (or whatever context xml file you referencing),

<!– Properties –>
<bean class=”org.springframework.beans.factory.config.PropertyPlaceholderConfigurer”>
   <property name=”locations”>
   <list>
      <value>classpath:properties/abc.properties</value>
   </list>
   </property>
</bean>

In the your class bean,

@Value(“${test.ref1}”)
private String testRef1;