spring注入配置文件属性到java类

<bean id="propertyConfigurer" class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
    <property name="locations">
        <list>
            <value>classpath*:application.properties</value>
        </list>
    </property>
</bean>

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

# 默认头像
userDefaultHeaderUrl=http://www.maoyupeng.com/Male.png

@Controller
@RequestMapping(value = "/userController")
public class userController {
    private static final Logger logger = Logger.getLogger(UserProjectController.class);
    @Value("#{configProperties['userDefaultHeaderUrl']}")
    private String userDefaultHeaderUrl;
}