CODEWITHSUNDEEP
javaspringproperties
NottmTony
NottmTony

Reputation: 456

Spring 3.2 Properties file reading dynamic property names (not auto injection)

I am using Spring 3.2 and have added a property file which I have been able to use for injecting values into java class variables.

*<bean id="serverProperties"
    class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
    <property name="locations">
        <list>
            <value>classpath:mysetof.properties</value>
        </list>
    </property>
    <property name="placeholderPrefix" value="$server{" />
    <property name="ignoreResourceNotFound" value="false" />
    <property name="ignoreUnresolvablePlaceholders" value="false" />
</bean>*

*@Value("#{$server{default.myproperty}}")
private double defaultMyProperty*

However I have some properties which I need to access dynamically.

How can I access these properties? I have used the env variable

*/** Spring var - used for accessing properties. */
@Autowired
private Environment env;*

but I get null values returned when I try to do the following :

propertyValue = env.getProperty("default.myproperty");

What is the best approach for accessing property values directly and not auto injecting them.

These properties may or may not be present and there could be a huge number of them so therefore I do not wish to use autoinjection as this would involve setting up a huge list of variables.

Thanks in advance.

Upvotes: 1

Views: 1879

Answers (1)

OTUser
OTUser

Reputation: 3848

You can try using CustomResourceBundleMessageSource as below in applicationContext.xml I've configured messages.properties file in core-messageSource bean and application-messages.properties file in messageSource bean

<bean id="core-messageSource"
        class="com.datacert.core.spring.CustomResourceBundleMessageSource">
        <property name="basenames">
            <list>
                <value>messages</value>
            </list>
        </property>
</bean>

<bean id="messageSource"
        class="com.datacert.core.spring.CustomResourceBundleMessageSource">
        <property name="parentMessageSource">
            <ref bean="core-messageSource"/>
        </property>
        <property name="basenames">
            <list>
                <value>application-messages</value>
            </list>
        </property>
</bean>

Then in your bean you can do as below

//I have security.cookie.timeout = 10 in my properties file
ResourceBundleMessageSource bean = new ResourceBundleMessageSource();
bean.setBasename("application-messages");
String message = bean.getMessage("security.cookie.timeout", null, Locale.getDefault());
System.out.println("message = "+message)//will print message = 10

Upvotes: 1

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