春季4 - 资源映射 - 未找到处理程序方法

Question

我知道这个问题有很多主题，因为我已经完成了所有这些问题。但我还没有找到任何解决方案。

基本上我有一个ResourceHandler映射资源，但进入jsp时没有找到css文件。我正在使用Spring 4.3.9.RELEASE。

项目这个样子的

的web.xml

<!DOCTYPE web-app PUBLIC 
"-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN" 
"http://java.sun.com/dtd/web-app_2_3.dtd" > 
<web-app> 
    <listener> 
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class> 
</listener> 

<servlet> 
<servlet-name>mvc-dispatcher</servlet-name> 
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class> 
    <init-param> 
     <param-name>contextClass</param-name> 
     <param-value> 
      org.springframework.web.context.support.AnnotationConfigWebApplicationContext 
     </param-value> 
    </init-param> 
    <init-param> 
     <param-name>contextConfigLocation</param-name> 
     <param-value> 
     com.res.context.MvcConfig 
     </param-value> 
    </init-param> 
    <load-on-startup>1</load-on-startup> 

<servlet-mapping> 
<servlet-name>mvc-dispatcher</servlet-name> 
<url-pattern>/</url-pattern> 
</servlet-mapping> 
</web-app> 

配置文件看起来像这样：

@Configuration 
@EnableWebMvc 
@ComponentScan(basePackages = {"com.res"}) 
public class MvcConfig extends WebMvcConfigurerAdapter { 
//I've already tried without this 
@Override 
public void configurePathMatch(PathMatchConfigurer configurer) { 
    super.configurePathMatch(configurer); 
    configurer.setUseRegisteredSuffixPatternMatch(false); 
    configurer.setUseSuffixPatternMatch(false); 
} 

@Override 
public void addResourceHandlers(ResourceHandlerRegistry registry) 
{ 
    registry.addResourceHandler("/resources/**") 
    .addResourceLocations("/resources/"); 
} 
@Override 
public void configureDefaultServletHandling(DefaultServletHandlerConfigurer configurer) { 
    // TODO Auto-generated method stub 
    configurer.enable(); 
} 
@Bean 
public InternalResourceViewResolver getInternalResourceViewResolver() { 
    InternalResourceViewResolver resolver = new InternalResourceViewResolver(); 
    resolver.setPrefix("/WEB-INF/views/"); 
    resolver.setSuffix(".jsp"); 
    return resolver; 
} 
} 

JSP文件

我已经尝试过的href

//Those two give 404 error code 
<link rel="stylesheet" href="resources/style.css" type="text/css"> 
<link rel="stylesheet" href="/resources/style.css" type="text/css"> 
//Those two give jsp fatal error with NullPointerException 
<link rel="stylesheet" href='<c:uri>value="/resources/style.css"</c:uri> 'type="text/css"> 
<link rel="stylesheet" href='<c:uri>value="resources/style.css"</c:uri> 'type="text/css"> 

控制器的多值

@Controller 
@RequestMapping("/") 

public class MyController { 
private static final Logger logger = Logger.getLogger(MyController.class); 
@RequestMapping("/site") 
public ModelAndView site() 
{ 

    ModelAndView model = new ModelAndView("site"); 
    model.addObject("txt", "Model"); 
    return model; 

}} 

最后最重要的部分

日志

2017-07-18 20:56:35 DEBUG DispatcherServlet:869 - DispatcherServlet with name 'mvc-dispatcher' processing GET request for [/res/site.htm] 
2017-07-18 20:56:35 DEBUG RequestMappingHandlerMapping:310 - Looking up handler method for path /site.htm 
2017-07-18 20:56:35 DEBUG RequestMappingHandlerMapping:320 - Did not find handler method for [/site.htm] 
2017-07-18 20:56:35 DEBUG RequestMappingHandlerMapping:310 - Looking up handler method for path /site.htm 
2017-07-18 20:56:35 DEBUG RequestMappingHandlerMapping:317 - Returning handler method [public org.springframework.web.servlet.ModelAndView com.res.controller.MyController.site()] 
2017-07-18 20:56:35 DEBUG DefaultListableBeanFactory:251 - Returning cached instance of singleton bean 'myController' 
2017-07-18 20:56:35 DEBUG DispatcherServlet:955 - Last-Modified value for [/res/site.htm] is: -1 
2017-07-18 20:56:35 DEBUG DefaultListableBeanFactory:1670 - Invoking afterPropertiesSet() on bean with name 'site' 
2017-07-18 20:56:35 DEBUG DispatcherServlet:1280 - Rendering view [org.springframework.web.servlet.view.JstlView: name 'site'; URL [/WEB-INF/views/site.jsp]] in DispatcherServlet with name 'mvc-dispatcher' 
2017-07-18 20:56:35 DEBUG JstlView:432 - Added model object 'txt' of type [java.lang.String] to request in view with name 'site' 
2017-07-18 20:56:35 DEBUG JstlView:166 - Forwarding to resource [/WEB-INF/views/site.jsp] in InternalResourceView 'site' 
2017-07-18 20:56:36 DEBUG DispatcherServlet:1000 - Successfully completed request 
2017-07-18 20:56:36 DEBUG DispatcherServlet:869 - DispatcherServlet with name 'mvc-dispatcher' processing GET request for [/res/resources/style.css] 
2017-07-18 20:56:36 DEBUG RequestMappingHandlerMapping:310 - Looking up handler method for path /resources/style.css 
2017-07-18 20:56:36 DEBUG RequestMappingHandlerMapping:320 - Did not find handler method for [/resources/style.css] 
2017-07-18 20:56:36 DEBUG RequestMappingHandlerMapping:310 - Looking up handler method for path /resources/style.css 
2017-07-18 20:56:36 DEBUG RequestMappingHandlerMapping:320 - Did not find handler method for [/resources/style.css] 
2017-07-18 20:56:36 DEBUG SimpleUrlHandlerMapping:192 - Matching patterns for request [/resources/style.css] are [/resources/**] 
2017-07-18 20:56:36 DEBUG SimpleUrlHandlerMapping:226 - URI Template variables for request [/resources/style.css] are {} 
2017-07-18 20:56:36 DEBUG SimpleUrlHandlerMapping:140 - Mapping [/resources/style.css] to HandlerExecutionChain with handler [ResourceHttpRequestHandler [locations=[ServletContext resource [/resources/]], resolvers=[org.springframework.web.servlet.resource.PathResourceResolver@4c531172]]] and 1 interceptor 
2017-07-18 20:56:36 DEBUG DispatcherServlet:955 - Last-Modified value for [/res/resources/style.css] is: -1 
2017-07-18 20:56:36 DEBUG DispatcherServlet:1048 - Null ModelAndView returned to DispatcherServlet with name 'mvc-dispatcher': assuming HandlerAdapter completed request handling 
2017-07-18 20:56:36 DEBUG DispatcherServlet:1000 - Successfully completed request 

我希望有人知道这里有什么问题，因为几个小时后，我想不出什么了。

Answer 1

问题是因为您的文件夹资源不在webapp，而您的servlet正在将webapp视为/。

第一种方式：

移动你的资源文件夹webapp下，然后到你的applicationContext.xml 添加下一行：

<mvc:resources mapping="/css/**" location="/resources/" /> 

，那么你可以导入你的style.css像这样的文件：

<link href="<c:url value="/resources/style.css" />" rel="stylesheet"> 

方式二：

您可以创建另一个的Servlet静态内容：

首先添加其下几行你网络。XML

<servlet> 
     <servlet-name>resources</servlet-name> 
     <servlet-class>com.res.servlets.DefaultServlet</servlet-class> 
</servlet> 


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

下一步，创建com.res.servlet在该包下创建类DefaultServlet像这样的包装：

public class DefaultServlet extends HttpServlet 
{ 
    private static final long serialVersionUID = 1L; 

    // Tomcat, Jetty, JBoss, and GlassFish 
    private static final String COMMON_DEFAULT_SERVLET_NAME = "default"; 

    // Resin 
    private static final String RESIN_DEFAULT_SERVLET_NAME = "resin-file"; 

    // WebLogic 
    private static final String WEBLOGIC_DEFAULT_SERVLET_NAME = "FileServlet"; 

    // WebSphere 
    private static final String WEBSPHERE_DEFAULT_SERVLET_NAME = "SimpleFileServlet"; 


    public String scanDefaultServlet(){ 
     if(this.getServletContext().getNamedDispatcher(COMMON_DEFAULT_SERVLET_NAME) != null) { 
      return COMMON_DEFAULT_SERVLET_NAME; 
     } else if(this.getServletContext().getNamedDispatcher(RESIN_DEFAULT_SERVLET_NAME) != null) { 
      return RESIN_DEFAULT_SERVLET_NAME; 
     } else if(this.getServletContext().getNamedDispatcher(WEBLOGIC_DEFAULT_SERVLET_NAME) != null){ 
      return WEBLOGIC_DEFAULT_SERVLET_NAME; 
     } else if(this.getServletContext().getNamedDispatcher(WEBSPHERE_DEFAULT_SERVLET_NAME) != null){ 
      return WEBSPHERE_DEFAULT_SERVLET_NAME; 
     } else { 
      throw new IllegalStateException("Cannot determine what Server you currently use"); 
     }  
    } 

    public void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException { 
     doGet(req, resp); 
    } 

    public void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException 
    { 
     RequestDispatcher rd = getServletContext().getNamedDispatcher(this.scanDefaultServlet()); 
     HttpServletRequest wrapped = new HttpServletRequestWrapper(req) { 
       public String getServletPath() {return "";} 
     }; 
     rd.forward(wrapped, resp); 
    } 
} 

现在你可以打电话给你的资源是这样的：

<link rel="stylesheet" type="text/css" href="<c:url value="/resources/resources/style.css"/>"> 

确保你已经在视图的顶部导入了这样的标签库：

个

<%@taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %> 

问候，