spring @value標籤從properties文件中注入屬性值

@Controller
@RequestMapping("/value")
public class ValuePropertyController extends ApplicationController{

    @Value("#{configProperties['jdbc.jdbcUrl']}")
    private String jdbcUrl;

    @RequestMapping
    public String value(){
        System.out.println(jdbcUrl);
        return "";
    }
}

applicationContext.xml

<bean id="configProperties" class="org.springframework.beans.factory.config.PropertiesFactoryBean">
       <property name="locations">
           <list>
               <value>classpath:database.properties</value>
           </list>
       </property>
    </bean>
    <bean id="propertyConfigurer" class="org.springframework.beans.factory.config.PreferencesPlaceholderConfigurer">
        <property name="properties" ref="configProperties" />
    </bean>

database.properties

jdbc.jdbcUrl=jdbc:mysql://l