Java 在没有组件扫描或bean定义的情况下定义控制器

我的代码库中有一个控制器，其软件包未进行组件扫描。这个控制器也没有在任何XML的bean中定义

不知怎的，控制器正在工作。我猜这是因为有一种方法可以在Spring中定义一个控制器，而无需扫描组件或在bean中定义它。但是，此控制器实现了一个名为AbstractControllerImpl的类，并且帮助器实现类正在扫描组件

助手被扫描的事实是否意味着控制器也被扫描？或者，如果没有，该控制器如何工作

@Controller
@RequestMapping("/something")
public class SomeController extends AbstractControllerImpl<SomeControllerHelper> {  
    //Some request mappings here
}

编辑：My web.xml。我删除了一些servlet映射并更改了一些名称，但看起来是这样的：

<?xml version="1.0" encoding="UTF-8"?>
<web-app id="WebApp_ID" version="2.4" xmlns="http://java.sun.com/xml/ns/j2ee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd">
    <display-name>SomeApp</display-name>

<welcome-file-list>
    <welcome-file>index.html</welcome-file>
    <welcome-file>index.htm</welcome-file>
    <welcome-file>index.jsp</welcome-file>
    <welcome-file>default.html</welcome-file>
    <welcome-file>default.htm</welcome-file>
    <welcome-file>default.jsp</welcome-file>
</welcome-file-list>

<listener>
    <listener-class>
        com.Log4jLoaderServlet
    </listener-class>
</listener>

<context-param>
    <param-name>crossContext</param-name>
    <param-value>true</param-value>
</context-param>

<!-- This listener will load other application context file in addition to springweb-servlet.xml -->
<listener>
    <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
<!-- The context params that read by ContextLoaderListener  -->
<context-param>
    <param-name>contextConfigLocation</param-name>
    <param-value>/WEB-INF/spring/root-application-context.xml</param-value>
</context-param>
<!-- Spring security filter -->
<filter>
    <filter-name>springSecurityFilterChain</filter-name>
    <filter-class>org.springframework.web.filter.DelegatingFilterProxy</filter-class>
</filter>

<filter-mapping>
    <filter-name>springSecurityFilterChain</filter-name>
    <url-pattern>/*</url-pattern>
</filter-mapping> 

<listener>
    <listener-class>
        org.springframework.web.context.request.RequestContextListener
    </listener-class>
</listener>

<servlet>
    <servlet-name>rest</servlet-name>
    <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
    <init-param>
        <param-name>contextConfigLocation</param-name>
        <param-value>/WEB-INF/spring/servlets/rest-servlet.xml</param-value>
    </init-param>       
    <load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
    <servlet-name>rest</servlet-name>
    <url-pattern>/service/*</url-pattern>
</servlet-mapping>

<servlet>
    <servlet-name>appservlet</servlet-name>
    <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
    <init-param>
        <param-name>contextConfigLocation</param-name>
        <param-value>/WEB-INF/spring/servlets/app-servlet.xml</param-value>
    </init-param>       

    <load-on-startup>1</load-on-startup>
</servlet>

<error-page>
    <error-code>404</error-code>        
    <location>/portal/error/notfound/</location>
</error-page>

<error-page>
    <error-code>500</error-code>
    <location>/portal/error/internalsystem/</location>
</error-page>

<jsp-config>
    <taglib>
        <taglib-uri>http://java.sun.com/jsp/jstl/core</taglib-uri>
        <taglib-location>/WEB-INF/tags/c.tld</taglib-location>
    </taglib>
    <taglib>
      <taglib-uri>http://jakarta.apache.org/taglibs/unstandard-1.0</taglib-uri>
      <taglib-location>/WEB-INF/tld/unstandard.tld</taglib-location>
    </taglib>
</jsp-config>   

SomeApp
index.html
index.htm
index.jsp
default.html
default.htm
default.jsp
com.Log4jLoaderServlet
交叉上下文
真的
org.springframework.web.context.ContextLoaderListener
上下文配置位置
/WEB-INF/spring/root-application-context.xml
springSecurityFilterChain
org.springframework.web.filter.DelegatingFilterProxy
springSecurityFilterChain
/*
org.springframework.web.context.request.RequestContextListener
休息
org.springframework.web.servlet.DispatcherServlet
上下文配置位置
/WEB-INF/spring/servlet/rest-servlet.xml
1.
休息
/服务/*
appservlet
org.springframework.web.servlet.DispatcherServlet
上下文配置位置
/WEB-INF/spring/servlets/app-servlet.xml
1.
404
/门户/错误/未找到/
500
/入口/错误/内部系统/
http://java.sun.com/jsp/jstl/core
/WEB-INF/tags/c.tld
http://jakarta.apache.org/taglibs/unstandard-1.0
/WEB-INF/tld/unstandard.tld

以下是app-servlet.xml：

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xmlns:p="http://www.springframework.org/schema/p"
    xmlns:context="http://www.springframework.org/schema/context"
    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">


    <bean id="viewResolver"
        class="org.springframework.web.servlet.view.UrlBasedViewResolver">
        <property name="viewClass" value="org.springframework.web.servlet.view.tiles2.TilesView" />
        <property name="order" value="0" />
    </bean>

    <bean id="jspViewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <property name="prefix" value="/WEB-INF/views/"/>
        <property name="order" value="1" />
    </bean> 

    <bean  class="org.springframework.web.servlet.view.ResourceBundleViewResolver">

        <property name="basename" value="views"/>
    </bean>

    <bean id="tilesConfigurer"
        class="org.springframework.web.servlet.view.tiles2.TilesConfigurer">
            <property name="definitions">
                <list>                                 
                    <value>/WEB-INF/views/something/views.xml</value>
                    <value>/WEB-INF/views/views.xml</value>
                </list>
            </property>
            <property name="preparerFactoryClass"
                value="org.springframework.web.servlet.view.tiles2.SpringBeanPreparerFactory"/>
    </bean>     
</beans>

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:context="http://www.springframework.org/schema/context"
    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">

    <context:component-scan base-package="com.dw.spring3.rest.controller" />
    <!-- To enable @RequestMapping process on type level and method level -->
    <bean class="org.springframework.web.servlet.mvc.annotation.DefaultAnnotationHandlerMapping" />
    <bean class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter">
        <property name="messageConverters">
            <list>
                <ref bean="jsonConverter" />
            </list>
        </property>
    </bean>

    <bean id="jsonConverter" class="org.springframework.http.converter.json.MappingJacksonHttpMessageConverter">
        <property name="supportedMediaTypes" value="application/json" />
    </bean>

</beans>

/WEB-INF/views/something/views.xml
/WEB-INF/views/views.xml

rest-servlet.xml：

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xmlns:p="http://www.springframework.org/schema/p"
    xmlns:context="http://www.springframework.org/schema/context"
    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">


    <bean id="viewResolver"
        class="org.springframework.web.servlet.view.UrlBasedViewResolver">
        <property name="viewClass" value="org.springframework.web.servlet.view.tiles2.TilesView" />
        <property name="order" value="0" />
    </bean>

    <bean id="jspViewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <property name="prefix" value="/WEB-INF/views/"/>
        <property name="order" value="1" />
    </bean> 

    <bean  class="org.springframework.web.servlet.view.ResourceBundleViewResolver">

        <property name="basename" value="views"/>
    </bean>

    <bean id="tilesConfigurer"
        class="org.springframework.web.servlet.view.tiles2.TilesConfigurer">
            <property name="definitions">
                <list>                                 
                    <value>/WEB-INF/views/something/views.xml</value>
                    <value>/WEB-INF/views/views.xml</value>
                </list>
            </property>
            <property name="preparerFactoryClass"
                value="org.springframework.web.servlet.view.tiles2.SpringBeanPreparerFactory"/>
    </bean>     
</beans>

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:context="http://www.springframework.org/schema/context"
    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">

    <context:component-scan base-package="com.dw.spring3.rest.controller" />
    <!-- To enable @RequestMapping process on type level and method level -->
    <bean class="org.springframework.web.servlet.mvc.annotation.DefaultAnnotationHandlerMapping" />
    <bean class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter">
        <property name="messageConverters">
            <list>
                <ref bean="jsonConverter" />
            </list>
        </property>
    </bean>

    <bean id="jsonConverter" class="org.springframework.http.converter.json.MappingJacksonHttpMessageConverter">
        <property name="supportedMediaTypes" value="application/json" />
    </bean>

</beans>

root-application-cnntext.xml：

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xmlns:p="http://www.springframework.org/schema/p"
    xmlns:context="http://www.springframework.org/schema/context"
    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">
    <context:component-scan
        base-package="com.base.notcontroller" />

    <import resource="/something/common-context.xml" />          
</beans>

助手正在扫描组件这一事实是否意味着 控制器也被扫描了？如果不是，这怎么可能 控制器工作吗

@Controller
@RequestMapping("/something")
public class SomeController extends AbstractControllerImpl<SomeControllerHelper> {  
    //Some request mappings here
}

不，那是不可能的

考虑到您的上下文配置是什么样子的，还不完全清楚

删除了一些servlet映射并更改了一些名称

但是您的

@Controller

类必须加载到上下文的某个位置，可能是在

rest-servlet.xml:

哪个有

<context:component-scan base-package="com.dw.spring3.rest.controller" />

---

您可以向

@Controller

类中添加一个无参数构造函数，并在其中放置一个断点，查看堆栈跟踪并确定它是在哪个上下文中初始化的

---

---

请注意，

AnnotationMethodHandlerAdapter

在Spring3.2中已被弃用。考虑使用<代码> <代码>来配置MVC环境。

让我们看看你的Web.xml。您还有其他SpringXML上下文文件吗？你有任何

@Configuration

类吗？@SotiriosDelimanolis我添加了我的web.xml，删除了一些servlet映射。如果你认为我应该找一些不在里面的东西，请告诉我，我会找的。在我的整个应用程序中没有一个

@Configuration

注释。您可以向我们展示您的类路径扫描配置吗？@MarkusMalkusch您知道将在中定义什么类型的文件/文件名吗？这个应用程序上有很多config/xml文件，我不知道你说的类路径扫描是什么意思。你的web.xml中列出了3个不同的spring上下文文件。。。你也能给我们看一下吗？好的，我刚刚接受了你的建议，添加了断点。以下是堆栈跟踪的外观：。这是否意味着它必须在XML中定义，因为它包含XMLWebApplicationContext调用？@user886596是的，这是您的第一个提示。我相信您可以选择

XMLWebApplicationContext

方法，它会将您带到该方法被阻止的位置。您可以检查该对象的属性，查找一个

位置

，该位置将告诉您该对象是哪个文件。

<context:component-scan base-package="com.dw.spring3.rest.controller" />

<servlet>
    <servlet-name>rest</servlet-name>
    <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
    <init-param>
        <param-name>contextConfigLocation</param-name>
        <param-value>/WEB-INF/spring/servlets/rest-servlet.xml</param-value>
    </init-param>       
    <load-on-startup>1</load-on-startup>
</servlet>