未找到带有 URI Spring MVC 的 HTTP 请求的映射 [英] No mapping found for HTTP request with URI Spring MVC

问题描述

这是我的 Web.xml

Here's my Web.xml

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

<servlet-mapping>
    <servlet-name>dispatcherServlet</servlet-name>
    <url-pattern>/*</url-pattern>
</servlet-mapping>

<listener>
    <listener-class>
        org.springframework.web.context.ContextLoaderListener
    </listener-class>
</listener>

我的 servlet-context.xml

my servlet-context.xml

<context:component-scan base-package="com.springexample.controller.impl" />
    <mvc:annotation-driven />

    <bean
        class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <property name="prefix">
            <value>/WEB-INF/views/</value>
        </property>
        <property name="suffix">
            <value>.jsp</value>
        </property>
    </bean>

最后是Handler类.这是在 com.springexample.controller.impl 下

And lastly the Handler class. which is under com.springexample.controller.impl

@Controller
public class IndexControllerImpl implements IndexController {

    @RequestMapping("/")
    public String index() {

        return "index";
    }
}

但是去localhost:8080/projectname/

它返回一个 404 错误.

it returns a 404 error.

Jul 27, 2013 8:18:31 PM org.springframework.web.servlet.DispatcherServlet noHandlerFound
WARNING: No mapping found for HTTP request with URI [/tasklist/WEB-INF/views/index.jsp] in DispatcherServlet with name 'dispatcherServlet'
Jul 27, 2013 8:18:37 PM org.springframework.web.servlet.DispatcherServlet noHandlerFound
WARNING: No mapping found for HTTP request with URI [/tasklist/index] in DispatcherServlet with name '

这是我的项目结构

推荐答案

使用 web.xml 配置他们在问题中的方式，特别是:

With the web.xml configured they way you have in the question, in particular:

<servlet-mapping>
    <servlet-name>dispatcherServlet</servlet-name>
    <url-pattern>/*</url-pattern>
</servlet-mapping>

对您的 Web 应用程序发出的所有请求都将被定向到 DispatcherServlet.这包括像 /tasklist/、/tasklist/some-thing.html、/tasklist/WEB-INF/views/index.jsp 这样的请求.

ALL requests being made to your web app will be directed to the DispatcherServlet. This includes requests like /tasklist/, /tasklist/some-thing.html, /tasklist/WEB-INF/views/index.jsp.

因此，当您的控制器返回一个指向 .jsp 的视图时，而不是允许您的服务器容器为请求提供服务，DispatcherServlet 会跳入并开始寻找可以为这个请求提供服务的控制器，它没有找到任何，因此 404.

Because of this, when your controller returns a view that points to a .jsp, instead of allowing your server container to service the request, the DispatcherServlet jumps in and starts looking for a controller that can service this request, it doesn't find any and hence the 404.

最简单的解决方法是让你的servlet url映射如下:

The simplest way to solve is to have your servlet url mapping as follows:

<servlet-mapping>
    <servlet-name>dispatcherServlet</servlet-name>
    <url-pattern>/</url-pattern>
</servlet-mapping>

注意缺少的*.这告诉容器任何没有 path info 的请求(url 末尾没有 .xxx)，应该被发送到 DispatcherServlet.使用此配置，当接收到 xxx.jsp 请求时，不会查询 DispatcherServlet，并且您的 servlet 容器的默认 servlet 将服务该请求并按预期呈现 jsp.

Notice the missing *. This tells the container that any request that does not have a path info in it (urls without a .xxx at the end), should be sent to the DispatcherServlet. With this configuration, when a xxx.jsp request is received, the DispatcherServlet is not consulted, and your servlet container's default servlet will service the request and present the jsp as expected.

希望这会有所帮助，我意识到您之前的评论指出问题已解决，但解决方案不能只是将 method=RequestMethod.GET 添加到 RequestMethod.

Hope this helps, I realize your earlier comments state that the problem has been resolved, but the solution CAN NOT be just adding method=RequestMethod.GET to the RequestMethod.

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