java Spring 4 - 资源映射 - 没有找到处理程序方法
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Spring 4 - Resources mapping - Did not find handler method
提问by Getriax
I know that there are many topics with this problem because I've gone over all of them. But still I haven't found any solution.
我知道这个问题有很多主题，因为我已经讨论了所有这些主题。但我仍然没有找到任何解决方案。
Basically I have a ResourceHandler that maps a resource but doesn't find the css file while entering the jsp. I'm using Spring 4.3.9.RELEASE.
基本上我有一个 ResourceHandler 映射资源但在输入 jsp 时没有找到 css 文件。我正在使用 Spring 4.3.9.RELEASE。
The project look like this
该项目看起来像这样
Web.xml
网页.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>
Configuration file looks like this:
配置文件如下所示：
@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;
}
}
The jsp file
jsp文件
I've already tried many values of href
我已经尝试了许多 href 的值
//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">
Controller
控制器
@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;
}}
And finally most important part
最后最重要的部分
logs
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
I hope that someone knows what is wrong here because after few hours I can't think of anything more.
我希望有人知道这里出了什么问题，因为几个小时后我想不出更多了。
回答by Ivan Lynch
The problem is because you have the folder resources out of webappand your servlet is looking at webappas /.
这个问题是因为你的文件夹资源出来webapp和你的servlet正在考虑webapp为/。
First way:
第一种方式：
Move your resourcesfolder under webappand then into your applicationContext.xmladd the next line:
将您的资源文件夹移动webapp到您的applicationContext.xml下，然后添加下一行：
<mvc:resources mapping="/css/**" location="/resources/" />
then you can import your style.css file like this:
然后你可以像这样导入你的 style.css 文件：
<link href="<c:url value="/resources/style.css" />" rel="stylesheet">
Second way:
第二种方式：
you can create another Servletfor static content:
您可以为静态内容创建另一个Servlet：
First add the next few lines in your web.xml
首先在web.xml 中添加接下来的几行
<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>
next step, create the package com.res.servletthe under that package create the class DefaultServletlike this:
下一步，创建包com.res.servlet，在该包下创建类DefaultServlet，如下所示：
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);
}
}
now you can call your resources like this:
现在你可以像这样调用你的资源：
<link rel="stylesheet" type="text/css" href="<c:url value="/resources/resources/style.css"/>">
Make sure you has imported the tag libs like this at the top of your view:
确保您在视图顶部导入了这样的标签库：
<%@taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
Regards,
问候，
