原始服务器没有找到目标资源的当前表示，或者不愿意透露存在该目标资源 [英] The origin server did not find a current representation for the target resource or is not willing to disclose that one exists

问题描述

web.xml

    <?xml version="1.0" encoding="UTF-8"?>
     <web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://xmlns.jcp.org/xml/ns/javaee" xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd" id="WebApp_ID" version="3.1">
  <display-name>springsecuritydemo</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> -->
  <servlet>
    <description></description>
    <display-name>offers</display-name>
    <servlet-name>offers</servlet-name>
    <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
   <load-on-startup>1</load-on-startup>
  </servlet>
  <servlet-mapping>
    <servlet-name>offers</servlet-name>
    <url-pattern>/DispatcherServlet</url-pattern>
  </servlet-mapping>
</web-app>

offers-sevlet.xml

    <?xml version="1.0" encoding="UTF-8"?>
<beans xmlns = "http://www.springframework.org/schema/beans"
   xmlns:context = "http://www.springframework.org/schema/context"
   xmlns:xsi = "http://www.w3.org/2001/XMLSchema-instance"
   xmlns:mvc="http://www.springframework.org/schema/mvc"
   xsi:schemaLocation = "http://www.springframework.org/schema/beans     
   http://www.springframework.org/schema/beans/spring-beans-4.3.xsd
   http://www.springframework.org/schema/context 
   http://www.springframework.org/schema/context/spring-context-4.3.xsd
   http://www.springframework.org/schema/mvc
   http://www.springframework.org/schema/mvc/spring-mvc.xsd">

   <context:component-scan base-package="com.spring.security.web"></context:component-scan> 
   <mvc:annotation-driven></mvc:annotation-driven>

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

</beans>

这里有什么问题？我无法访问home.jsp。
我实际上是在春季3.0观看教程，我已经完成了视频中的显示。谁能在这里指出我的错误？

what is wrong here? i cannot access home.jsp. i am actually watching a tutorial in spring 3.0 and i have done exactly shown in video. can anyone point my mistake here?

推荐答案

问题在于servlet-mapping的url模式。

the problem is in url pattern of servlet-mapping.

 <url-pattern>/DispatcherServlet</url-pattern>

假设我们的控制器是

@Controller
public class HomeController {
    @RequestMapping("/home")
    public String home(){
        return "home";
    }
}

当我们在浏览器上点击某个网址时。调度程序servlet将尝试映射此URL。

when we hit some URL on our browser. the dispatcher servlet will try to map this url.

我们的serlvet的url模式目前是 / Dispatcher ，这意味着资源来自 {contextpath} / Dispatcher

the url pattern of our serlvet currently is /Dispatcher which means resources are served from {contextpath}/Dispatcher

但是当我们请求 http：// localhost：8080 / home 我们实际上要求 / 中的资源不可用。
所以要么我们需要说调度员servlet从 / 服务

but when we request http://localhost:8080/home we are actually asking resources from / which is not available. so either we need to say dispatcher servlet to serve from / by doing

<url-pattern>/</url-pattern>

我们通过 / Dispatcher / *

例如

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
xmlns="http://xmlns.jcp.org/xml/ns/javaee" 
xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee 
http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd" id="WebApp_ID" 
version="3.1">
  <display-name>springsecuritydemo</display-name>

  <servlet>
    <description></description>
    <display-name>offers</display-name>
    <servlet-name>offers</servlet-name>
    <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
    <load-on-startup>1</load-on-startup>
  </servlet>
  <servlet-mapping>
    <servlet-name>offers</servlet-name>
    <url-pattern>/Dispatcher/*</url-pattern>
  </servlet-mapping>

</web-app>

并请求 http：// localhost：8080 / Dispatcher / home
或只需 / 就可以请求

http://localhost:8080/home

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