How to get key value from properties file at runtime using spring

I want to get the changed key value from properties file at runtime.

test.properties file: name = Hi

I have made Thread sleep with 5 sec and changed the key value as "Hello" but it is not getting changed.

classpath:test.properties

Blockquote

    <property name="ignoreResourceNotFound" value="true" />
    <property name="ignoreUnresolvablePlaceholders" value="true" />
</bean>
<bean id="messageSource"
    class="org.springframework.context.support.ReloadableResourceBundleMessageSource">
    <property name="basenames">
        <list>
            <value>classpath:test</value>
        </list>
    </property>
    <property name="cacheSeconds" value="1" />
</bean>
<bean id="tempBean" name="tempBean1" class="org.sri.spring.temp.Temp"
    lazy-init="false" scope="prototype">
    <constructor-arg type="String" value="${name}" />
</bean>