Spring - using static final fields (constants) for bean initialization Spring - using static final fields (constants) for bean initialization spring spring

Spring - using static final fields (constants) for bean initialization


Something like this (Spring 2.5)

<bean id="foo" class="Bar">    <property name="myValue">        <util:constant static-field="java.lang.Integer.MAX_VALUE"/>    </property></bean>

Where util namespace is from xmlns:util="http://www.springframework.org/schema/util"

But for Spring 3, it would be cleaner to use the @Value annotation and the expression language. Which looks like this:

public class Bar {    @Value("T(java.lang.Integer).MAX_VALUE")    private Integer myValue;}


Or, as an alternative, using Spring EL directly in XML:

<bean id="foo1" class="Foo" p:someOrgValue="#{T(org.example.Bar).myValue}"/>

This has the additional advantage of working with namespace configuration:

<tx:annotation-driven order="#{T(org.example.Bar).myValue}"/>


don't forget to specify the schema location..

<?xml version="1.0" encoding="UTF-8"?><beans xmlns="http://www.springframework.org/schema/beans"   xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"   xmlns:util="http://www.springframework.org/schema/util"   xsi:schemaLocation="     http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.1.xsd     http://www.springframework.org/schema/util  http://www.springframework.org/schema/util/spring-util-3.1.xsd"></beans>