java - How to do arithmetic in Spring properties, with values from a properties file? -


example use-case: properties file passes in numeric value in millis, , want use in seconds.

your .properties file:

jdbc.timeout= 2000

your applicationcontext.xml currently

<bean id="datasource" class="org.apache.commons.dbcp.basicdatasource" destroy-method="close">           <property name="driverclassname" value="com.mysql.jdbc.driver" />            <property name="url"value="jdbc:mysql://myserver/mydb" />    <property name="username" value="user" />            <property name="password" value="changeme" />            <property name="validationquery" value="select 1;"/>             <property name="validationquerytimeout" value="${jdbc.timeout}" /> </bean>

you want validationquerytimeout value in seconds, how convert it?

if you're using spring 3.0 or later, can use property inside spel expression this: 

   <property name="validationquerytimeout" value="#{${jdbc.timeout}/1000}" />

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