java - 警告 : No mapping found for HTTP request with URI [ ] in DispatcherServlet with name

Question

我的 web.xml 为

<context-param>
        <param-name>contextConfigLocation</param-name>
        <param-value>/WEB-INF/applicationContext.xml</param-value>
    </context-param>
    <listener>
        <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
    </listener>
    <servlet>
        <servlet-name>dispatcher</servlet-name>
        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
        <load-on-startup>2</load-on-startup>
    </servlet>
    <servlet-mapping>
        <servlet-name>dispatcher</servlet-name>
        <url-pattern>/</url-pattern>
    </servlet-mapping>

应用上下文为

<?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:aop="http://www.springframework.org/schema/aop"
       xmlns:tx="http://www.springframework.org/schema/tx"
       xmlns:context="http://www.springframework.org/schema/context"
       xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.1.xsd
       http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-3.1.xsd
       http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.1.xsd
       http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.1.xsd"
>

    <context:component-scan base-package="com.mindedges" />


</beans>

调度器 servlet 作为

    <?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:aop="http://www.springframework.org/schema/aop"
           xmlns:tx="http://www.springframework.org/schema/tx"
           xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.1.xsd
           http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-3.1.xsd
           http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.1.xsd">

        <bean class="org.springframework.web.servlet.mvc.support.ControllerClassNameHandlerMapping"/>

        <!--
        Most controllers will use the ControllerClassNameHandlerMapping above, but
        for the index controller we are using ParameterizableViewController, so we must
        define an explicit mapping for it.
        -->
        <bean id="urlMapping" class="org.springframework.web.servlet.handler.SimpleUrlHandlerMapping">
            <property name="mappings">
                <props>
                    <prop key="index.htm">indexController</prop>
                </props>
            </property>
        </bean>

        <bean id="viewResolver"
              class="org.springframework.web.servlet.view.InternalResourceViewResolver"
              p:prefix="/WEB-INF/jsp/"
              p:suffix=".jsp" />

        <!--
        The index controller.
        -->
        <bean name="indexController"
              class="org.springframework.web.servlet.mvc.ParameterizableViewController"
              p:viewName="index" />

    </beans>

com.mindedges.testapp 包中的 Controller

@Controller
@RequestMapping("/sample")
public class SampleController  {

    public String sample(Model model){
        return "sample.jsp";
    }
}

当我点击 http://localhost:8084/TestApp/sample 时。

WARNING: No mapping found for HTTP request with URI [/TestApp/sample] in DispatcherServlet with name

此外，当 spring 启动时，我没有看到 Testapp/sample 加载的处理程序

我想我的组件扫描不工作。为什么会这样？任何其他原因

编辑: 调度程序上下文是

<?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:aop="http://www.springframework.org/schema/aop"
       xmlns:tx="http://www.springframework.org/schema/tx"   
       xmlns:context="http://www.springframework.org/schema/context"
       xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.1.xsd
       http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-3.1.xsd
       http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.1.xsd
       http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.1.xsd
">

    <context:component-scan base-package="com.mindedges" />

    <bean class="org.springframework.web.servlet.mvc.support.ControllerClassNameHandlerMapping"/>

    <!--
    Most controllers will use the ControllerClassNameHandlerMapping above, but
    for the index controller we are using ParameterizableViewController, so we must
    define an explicit mapping for it.
    -->
    <bean id="urlMapping" class="org.springframework.web.servlet.handler.SimpleUrlHandlerMapping">
        <property name="mappings">
            <props>
                <prop key="index.htm">indexController</prop>
            </props>
        </property>
    </bean>

    <bean id="viewResolver"
          class="org.springframework.web.servlet.view.InternalResourceViewResolver"
          p:prefix="/WEB-INF/jsp/"
          p:suffix=".jsp" />

    <!--
    The index controller.
    -->
    <bean name="indexController"
          class="org.springframework.web.servlet.mvc.ParameterizableViewController"
          p:viewName="index" />

</beans>

Answer 1

返回不带.jsp 的 View 名称文件扩展名。 View 名称的解析由 InternalResourceViewResolver 处理.

public String sample(Model model){
    return "sample";
}

您的配置片段:

<bean id="viewResolver"
      class="org.springframework.web.servlet.view.InternalResourceViewResolver"
      p:prefix="/WEB-INF/jsp/"
      p:suffix=".jsp" />

采用 View 名称 sample并应用适当的前缀 ( /WEB-INF/jsp/ ) 和后缀 ( .jsp ) 来形成用于 View 解析的整个 View 名称。

还要确保 sample.jsp位于/WEB-INF/jsp/sample.jsp .

同样在使用 @RequestMapping 时annotation 您必须通过包含 <mvc:annotation-driven/> 在调度程序 serlvet 的配置中启用这些注释.

您还必须在调度程序配置中添加组件扫描，以便 Controller 注册到调度程序 servlet。当前，您在 applicationContext.xml 内执行组件扫描配置文件使用:

<context:component-scan base-package="com.mindedges" />

但是，由于此组件扫描发生在 applicationContext 内文件注册的 bean(假设它们是您的 Controller )将不可用于调度程序 serlvet。您必须将此配置片段放在 dispatcher-context.xml 中.

你们很多想咨询我的一个previous answers关于调度程序配置和上下文配置之间的差异。

在您的 dispatcher-context.xml 文件中也有一些空白和一个 mvc namespace 丢失。我已更正这些问题并在此 GitHub Gist 中提供它们.