使用Spring的ReloadableResourceBundleMessageSource读取properties配置

<bean id="messageSource" class="org.springframework.context.support.ReloadableResourceBundleMessageSource">  
     <property name="basename" value="classpath:message-resource"/>  
     <property name="defaultEncoding" value="GBK"/>  
</bean>

public class MessageUtil
{
    private static MessageSource messageSource;

    private static void init()
    {
        if (messageSource == null)
        {
            synchronized (MessageUtil.class)
            {
                messageSource = (MessageSource) applicationContextFactory.getBean("messageSource");
            }
        }
    }

    public static String getMessage(String id, Object[] param)
    {
        init();
        return messageSource.getMessage(id, param, "Required", null);
    }
    public static String getMessage(String id)
    {
        init();
        return messageSource.getMessage(id, null, "Required", null);
    }
}