javax.servlet.ServletException：沒有處理程序適配器

Question

我在xml文件中添加了下面的代碼，但是當我刪除了下面的代碼后，它的工作正常。因此，請讓我知道我在哪里寫錯了代碼。

 <bean class="org.springframework.http.converter.StringHttpMessageConverter">
             <property name="supportedMediaTypes" value = "text/plain;charset=UTF-8" />
        </bean>

        <bean class = "org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter">
            <property name="messageConverters">
                <array>
                    <bean class = "org.springframework.http.converter.StringHttpMessageConverter">
                        <property name="supportedMediaTypes" value = "text/plain;charset=UTF-8" />
                    </bean>
                </array>
            </property>
        </bean> 

我有例外

<bean class="org.springframework.web.servlet.mvc.support.ControllerClassNameHandlerMapping" />
     <bean class="pakage">
         <property name="domainManager" ref="domainManager" />
         <property name="userProfileDao" ref="userProfileDao" />
      </bean>

我的MVC-dispatcher-servlet.xml具有以上兩個bean標簽

 <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"
            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-3.0.xsd">

            <context:component-scan base-package="package.*" />
            <context:annotation-config /> 

            <bean class="org.springframework.http.converter.StringHttpMessageConverter">
                 <property name="supportedMediaTypes" value = "text/plain;charset=UTF-8" />
            </bean>

            <bean class = "org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter">
                <property name="messageConverters">
                    <array>
                        <bean class = "org.springframework.http.converter.StringHttpMessageConverter">
                            <property name="supportedMediaTypes" value = "text/plain;charset=UTF-8" />
                        </bean>
                    </array>
                </property>
            </bean>


             <context:property-placeholder location="classpath:placeholder.properties"/>
             <!--   Start Interalization  -->
             <bean id="messageSource"
                class="org.springframework.context.support.ResourceBundleMessageSource">
                <property name="basename" value="language" />
            </bean>

             <bean id="localeResolver"
                class="org.springframework.web.servlet.i18n.SessionLocaleResolver">
                <property name="defaultLocale" value="en" />
            </bean>

            <bean id="localeChangeInterceptor"
                class="org.springframework.web.servlet.i18n.LocaleChangeInterceptor">
                <property name="paramName" value="language" />
            </bean>



            <bean id="handlerMapping"
                  class="org.springframework.web.servlet.mvc.annotation.DefaultAnnotationHandlerMapping">
                <property name="interceptors">
                    <ref bean="localeChangeInterceptor" />
                </property>
            </bean>

             <bean class="org.springframework.web.servlet.mvc.support.ControllerClassNameHandlerMapping" />
             <bean class="package">
                 <property name="domainManager" ref="domainManager" />
                 <property name="userProfileDao" ref="userProfileDao" />
              </bean>
             <!--  End Interalization    -->

            <!-- Register the welcome.properties -->


            <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
                <property name="prefix">
                    <value>/WEB-INF/jsp/</value>
                </property>
                <property name="suffix">
                    <value>.jsp</value>
                </property>
                <property name="contentType" value="text/html;charset=UTF-8" />
            </bean>
            <import resource="Hibernate.xml"/> 

        </beans>

以下是例外

javax.servlet.ServletException: No adapter for handler [package.ChromeExtensionController@bc7722]: The DispatcherServlet configuration needs to include a HandlerAdapter that supports this handler
    at org.springframework.web.servlet.DispatcherServlet.getHandlerAdapter(DispatcherServlet.java:1128)
    at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:903)
    at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:856)
    at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:936)
    at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:827)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:617)
    at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:812)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
    at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:511)
    at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1166)
    at com.google.appengine.api.socket.dev.DevSocketFilter.doFilter(DevSocketFilter.java:74)
    at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
    at com.google.appengine.tools.development.ResponseRewriterFilter.doFilter(ResponseRewriterFilter.java:123)
    at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
    at com.google.appengine.tools.development.HeaderVerificationFilter.doFilter(HeaderVerificationFilter.java:34)
    at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
    at com.google.appengine.api.blobstore.dev.ServeBlobFilter.doFilter(ServeBlobFilter.java:63)
    at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
    at com.google.apphosting.utils.servlet.TransactionCleanupFilter.doFilter(TransactionCleanupFilter.java:43)
    at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
    at com.google.appengine.tools.development.StaticFileFilter.doFilter(StaticFileFilter.java:125)
    at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
    at com.google.appengine.tools.development.DevAppServerModulesFilter.doDirectRequest(DevAppServerModulesFilter.java:368)
    at com.google.appengine.tools.development.DevAppServerModulesFilter.doDirectModuleRequest(DevAppServerModulesFilter.java:351)
    at com.google.appengine.tools.development.DevAppServerModulesFilter.doFilter(DevAppServerModulesFilter.java:116)
    at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
    at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:388)
    at org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216)
    at org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:182)
    at org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:765)
    at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:418)
    at com.google.appengine.tools.development.DevAppEngineWebAppContext.handle(DevAppEngineWebAppContext.java:97)
    at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152)
    at com.google.appengine.tools.development.JettyContainerService$ApiProxyHandler.handle(JettyContainerService.java:485)
    at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152)
    at org.mortbay.jetty.Server.handle(Server.java:326)
    at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:542)
    at org.mortbay.jetty.HttpConnection$RequestHandler.headerComplete(HttpConnection.java:923)
    at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:547)
    at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:212)
    at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:404)
    at org.mortbay.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java:409)
    at org.mortbay.thread.QueuedThreadPool$PoolThread.run(QueuedThreadPool.java:582)

Answer 1

我花了一些時間才能通過Spring文檔中的大量閱讀來弄清楚這一點。

在Spring MVC中，當需要映射請求->處理程序對象時，我們需要實現Handler Mapping接口。

這在org.springframework.web.servlet中，因為Spring在后台使用servlet技術。

在dispatcher-servlet中，可以實現任何處理程序映射。

但是，默認情況下，使用Dispatcher-servlet包含BeanNameUrlHandletMapping和DefaultAnnotationHandlerMapping 。

請參閱以獲取更多詳細信息。 http://docs.spring.io/spring/docs/current/javadoc-api/org/springframework/web/servlet/DispatcherServlet.html

解

由於BeanNameUrlHandletMapping是默認提供的，因此您無需在調度程序中再次重寫它 。 如果您已完成操作，則只需將其刪除即可 。 為我工作。 ：d

有關更多詳細信息，請參見我的博客文章 。

Answer 2

您將需要在配置中添加<mvc:annotation-driven /> 。 使用<context:annotation-config />將啟用對@Autowired注釋的支持。

您可以從配置中刪除StringHttpMessageConverter和AnnotationMethodHandlerAdapter ，因為它不會完成任何操作。 無論如何， AnnotationMethodHandlerAdapter都將注冊支持所有媒體類型的StringHttpMessageConverter ，然后通過添加<mvc:annotation-driven />來注冊。