Pass Parameter to ApplicationContext

Question

I my application I have an application-context.xml. Now I am instantiating The ApplicationContext as:

ApplicationContext context = new ClassPathXmlApplicationContext("application-context.xml");

Is it possible to pass parameter through this instantiation so that those parameters could be used to initialize some properties of some beans?

PS: Not using property file. As the parameters are generated run time, like exicutable jar's location, system architecture, os name etc which is variable.

Answer 1

You can use the PropertyPlaceholderConfigurer in your applicationContext.xml

<context:property-placeholder location="classpath:my.properties"/>

This allows you to reference properties directly in your bean declarations using syntax ${myProperty} assuming the properties file contains a property named myProperty.

A sample how you can use such a property:

<bean id="foo" class="com.company.Foo">
   <property name="bar" value="${myProperty}"/>
</bean>

Another alternative could be based on the @Value annotation powered by SpEL.