Spring XML conf-从jdbc.properties连接两个参数

Question

I want to divide JDBC URL and URL params.

In jdbc.properties I have:

jdbc.driverClassName=com.mysql.jdbc.Driver
jdbc.url=jdbc:mysql://db.server.tld:3306/dbName
jdbc.username=user
jdbc.password=pass
jdbc.urlParams=?useUnicode=true&characterEncoding=utf-8

In spring xml config:

<bean id="propertyConfigurer"
    class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
    <property name="location"><value>classpath:jdbc.properties</value></property>
</bean>
<bean id="dataSource"
    class="org.springframework.jdbc.datasource.DriverManagerDataSource">
    <property name="driverClassName" value="${jdbc.driverClassName}" />
    <property name="url" value="${jdbc.url}${jdbc.urlParams}" />
    <property name="username" value="${jdbc.username}" />
    <property name="password" value="${jdbc.password}" />
</bean>

But it doesn't work. Is there any way to join these two params?

Answer 1

Assuming that you have included Spring Expression Language (section 8.4) module with your application, you should be able to use the following:

#{'${jdbc.url}' + '${jdbc.urlParams}'}

as the value for url property.