how to update a bean in a spring context via a properties file

[Tony Evans]

I have been told its possible to update a bean in a spring context via a properties file, are there any good examples. the web pages i have looked at are all injection of beans via setterts and contructors, but not anything i can find on update the bean properties via a properties file.

Is it only via setters, can you update inner beans or do all beans have to be declared outside a calling bean.

Thanks for any help

Regards Tony

[Tim Cooke]

Do you mean something like this? Where the values for each bean property is obtained from a standard Java properties file.

<bean class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer"> <property name="locations" value="classpath:com/foo/jdbc.properties"/> </bean> <bean id="dataSource" destroy-method="close" class="org.apache.commons.dbcp.BasicDataSource"> <property name="driverClassName" value="${jdbc.driverClassName}"/> <property name="url" value="${jdbc.url}"/> <property name="username" value="${jdbc.username}"/> <property name="password" value="${jdbc.password}"/> </bean>
jdbc.driverClassName=org.hsqldb.jdbcDriver jdbc.url=jdbc:hsqldb:hsql://production:9002 jdbc.username=sa jdbc.password=root