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

Question

is it possible to define a bean with the use of static final fields of CoreProtocolPNames class like this:

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<bean id="httpParamBean" class="org.apache.http.params.HttpProtocolParamBean">      <constructor-arg ref="httpParams"/>      <property name="httpElementCharset" value="CoreProtocolPNames.HTTP_ELEMENT_CHARSET" />      <property name="version" value="CoreProtocolPNames.PROTOCOL_VERSION"> </bean> 

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public interface CoreProtocolPNames {      public static final String PROTOCOL_VERSION = "http.protocol.version";       public static final String HTTP_ELEMENT_CHARSET = "http.protocol.element-charset";  } 

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If it is possible, what is the best way of doing this ?

Answer 1

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; }