Java 爪哇8及；Spring MVC：错误“；“404未找到”；删除常量接口时已解决。有什么问题？

我有一个包含GET方法的类。当我试图与邮递员联系时，我得到一个404未找到错误但是，如果我删除“implements SubscriptionConstants”并使用完全相同的请求调用它，则一切正常（状态代码200）。

下面是我得到404错误的类：

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.ResponseBody; 
// other imports

@Controller
@Measured(canStartRootStack = true)
public class AlertsResource extends AbstractResource implements SubscriptionConstants {


    @Autowired
    private SubscriptionSubscriberService subscriptionSubscriberService;

    @RequestMapping(value = "/alerts/{triggerid}/subscribers", method = RequestMethod.GET,
            produces = APPLICATION_JSON_UTF8_VALUE)
    @ResponseBody
    public List<SubscriptionSubscriber> loadSubscribers(@PathVariable final String triggerid) {
        return subscriptionSubscriberService.getSubscribers(triggerid);
    }
 
   // other methods...

    }

SubscriptionConstants是一个接口，但它只包含以下常量：

String  USER                            = "user";
String  LOGIN                           = "login";

以下是mvc-servlet.xml文件：

<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:context="http://www.springframework.org/schema/context"
       xmlns:mvc="http://www.springframework.org/schema/mvc"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:aop="http://www.springframework.org/schema/aop"
       xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
        http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsd
        http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-3.2.xsd
        http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop.xsd
        ">

    <!-- Sub Context used for Rest services -->

    <aop:aspectj-autoproxy />

    <context:component-scan base-package="com.mycompany.myapp.webapp.resource" />
    <context:property-placeholder/>
    <mvc:annotation-driven>
        <mvc:message-converters register-defaults="false">
            <bean class="org.springframework.http.converter.json.MappingJackson2HttpMessageConverter">
                <property name="objectMapper" ref="jsonObjectMapper"/>
            </bean>
            <bean class="org.springframework.http.converter.StringHttpMessageConverter"/>
        </mvc:message-converters>
    </mvc:annotation-driven>

</beans>

<!-- Spring MVC -->
<servlet>
    <servlet-name>mvc</servlet-name>
    <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
    <init-param>
        <param-name>contextConfigLocation</param-name>
        <param-value>classpath:com/mycompany/myapp/webapp/mvc-servlet.xml</param-value>
    </init-param>
    <load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
    <servlet-name>mvc</servlet-name>
    <url-pattern>/resource/*</url-pattern>
</servlet-mapping>

但我仍然不知道为什么“实现SubscriptionConstants”会导致404错误

---

当仍然存在“implements SubscriptionConstants”时，我在启动Tomcat服务器时检查了日志，我在日志中没有发现任何错误，并且带有关键字“controller”或“AlertsResource”或“SubscriptionConstants”的内容都不是同一个包下的文件。如果可能的话，你能分享项目结构的截图吗。一个原因可能是其中一个文件位于未被扫描的包中。可能是因为不是主应用程序包的子应用程序。您可以发布控制器的映射方式吗？。是的，两个文件都在同一个包中。请共享失败的类中控制器注释的导入语句。@JamesJithin我在我的帖子中添加了导入

<!-- Spring MVC -->
<servlet>
    <servlet-name>mvc</servlet-name>
    <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
    <init-param>
        <param-name>contextConfigLocation</param-name>
        <param-value>classpath:com/mycompany/myapp/webapp/mvc-servlet.xml</param-value>
    </init-param>
    <load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
    <servlet-name>mvc</servlet-name>
    <url-pattern>/resource/*</url-pattern>
</servlet-mapping>

import static com.mycompany.myapp.service.alert.subscription.constants.SubscriptionConstants.USER;