CODEWITHSUNDEEP
springproperties
HyLian
HyLian

Reputation: 5093

Store Custom properties in aplicationContext.xml Spring file

I need to store some configuration parameters for a web application that uses spring framework.

Typically I'll use a configurationfile.properties file but i wonder if i can store that values in the applicationContext.xml file.

One workaround could be to create a JavaBean class to store the values, and build that class using spring, something like this:

<bean id="configurationBean" class="mypackage.someClass">
 <property name="confValue1">
   <value>myValue1</value>
 </property>
 ....
</bean>

But i would like to know if is there a way to store those parameters without the needing to create that class.

Thanks in advance.

I think that the best solution that fits my requirements is to use a java.util.Properties instance as a Spring Bean.

Thank you all.

Upvotes: 9

Views: 23668

Answers (4)

hank wall
hank wall

Reputation: 1

The best way is to use spring PropertyPlaceholderConfigurer 

<bean id="propertyConfigurer" class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
    <property name="locations">
        <list>
            <value>classpath:yourconfigurationfile.properties</value>
        </list>
    </property>
</bean>

then 

<bean id="configurationBean" class="mypackage.someClass">
    <property name="confValue1">
        <value>${myvalue1}</value>
    </property>
    ....
</bean>

and in yourconfigurationfile.properties

myvalue1= value1

Upvotes: 0

Darren Greaves
Darren Greaves

Reputation: 3344

This should work with the following syntax.

<bean id="props" class="java.util.Properties" >
    <constructor-arg>
        <props>
            <prop key="myKey">myValue</prop>
            <prop ...>
        </props>
    </constructor-arg>
</bean>

You are taking advantage of the fact that java.util.Properties has a copy constructor that takes a Properties object.

I do this for a HashSet which also has a copy constructor (as do HashMaps and ArrayLists) and it works perfectly.

Upvotes: 16

cliff.meyers
cliff.meyers

Reputation: 17734

I think you'll get the best results using Spring's PropertyPlaceholderConfigurer which allows you to map values from a regular .properties file against properties defined on your beans.

http://static.springframework.org/spring/docs/2.5.x/reference/beans.html#beans-factory-placeholderconfigurer

The example shows how to set the JDBC connection properties directly on an instance of javax.sql.DataSource, eliminating the need for an intermediate "configuration bean."

Upvotes: 1

Mark
Mark

Reputation: 29139

Spring has builtin support for specifying properties within the application context XML. See section 3.3.2.4 of the Spring Reference docs.

Upvotes: 1

Related Questions