Spring MVC resource mapping
I was testing some request mapping in Spring MVC and I ran into a strange situation in my application. I decided to create a simple cenario so you can understand my problem. I'll show you the details of my project first (source) and then I'll move on to my question.
I have the following directory structure in my project:
+webapp
+WEB-INF
+recursos
+estilos
test.css
+spring
fronte-beans.xml
+views
+testes
page1.jsp
page2.jsp
web.xml
My Tomcat deployment descriptor:
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns="http://java.sun.com/xml/ns/j2ee" xmlns:web="http://xmlns.jcp.org/xml/ns/javaee"
xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd http://xmlns.jcp.org/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
id="WebApp_ID" version="2.4">
<display-name>Archetype Created Web Application</display-name>
<servlet>
<servlet-name>fronte</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<init-param>
<param-name>contextConfigLocation</param-name>
<param-value>WEB-INF/spring/fronte-beans.xml</param-value>
</init-param>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>fronte</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>
</web-app>
My application context for the DispatcherServlet:
<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:mvc="http://www.springframework.org/schema/mvc"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="
http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/mvc
http://www.springframework.org/schema/mvc/spring-mvc.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context.xsd ">
<mvc:annotation-driven />
<mvc:resources mapping="/recursos/**" location="/WEB-INF/recursos/" />
<context:component-scan base-package="com.regra7.minhaapp.contro" />
<bean id="handlerMapping"
class="org.springframework.web.servlet.handler.SimpleUrlHandlerMapping">
</bean>
<bean id="viewResolver"
class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="prefix" value="/WEB-INF/views/" />
<property name="suffix" value=".jsp" />
</bean>
</beans>
My controller class for page1.jsp:
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
@Controller
@RequestMapping(value="/path")
public class TestController
{
@RequestMapping(value="/to/something")
public String getPage()
{
return "testes/page2";
}
}
My page1.jsp:
<!DOCTYPE html>
<%@ page
language="java"
contentType="text/html; charset=ISO-8859-1"
pageEncoding="ISO-8859-1"%>
<%@taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %>
<%@taglib uri="http://java.sun.com/jsp/jstl/functions" prefix="fn" %>
<html lang="pt-BR">
<!-- ############################################### -->
<!-- HEADER -->
<!-- ############################################### -->
<head>
<title>Test Page</title>
<meta name="author" content="RDS" />
<meta name="description" content="? ? ?" />
<meta charset="UTF-8" />
<link rel="stylesheet" type="text/css" href="recursos/estilos/test.css" media="all" />
</head>
<!-- ############################################### -->
<!-- BODY -->
<!-- ############################################### -->
<body>
<h1>PAGE 1</h1>
<p>This is a test, p1.</p>
<p>This is a test, p2.</p>
<p>This is a test, p3.</p>
<a href="${pageContext.request.contextPath}/path/to/something">CLICK TO PAGE 2</a>
</body>
</html>
I can access page1.jsp and page2.jsp smoothly, but no CSS file page2.jsp was found. The following text is printed on my console:
dez 29, 2014 8:16:22 PM org.springframework.web.servlet.PageNotFound noHandlerFound
WARNING: No mapping found for HTTP request with URI [/testeSpringMvc/path/to/recursos/estilos/test.css] in DispatcherServlet with name 'fronte'
Why is "/ path / to" included in the resulting path? If I try to add different combinations of mapping, both class and method level, the same thing happens. However, if I match the link to the query string (URL) as follows, the file is found with no problem ...
Page1.jsp:
<a href="${pageContext.request.contextPath}/?cd=page2">CLICK TO PAGE 2</a>
Controller:
@Controller
@RequestMapping(value="/")
public class TestController
...
@RequestMapping(params="cd=page2")
public String getPage()
What's happening? How can I set the path that I want my pages to use and find the resources they need? I am trying to split pages in different paths so that I can apply security features from Tomcat (security restrictions).
NOTE . I tried using contextPath to help me set up the CSS file path, but nothing worked. In fact, the situation got worse because Page1.jsp also lacked styling:
<link rel="stylesheet" type="text/css" href="${pageContext.request.contextPath}recursos/estilos/test.css" media="all" />
As always, thank you for your attention and time.
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I just found the answer to my problems. I'll leave the solution here, but unfortunately I didn't understand how it solves the visible scenario.
I found that this can be solved with JSTL . I read the JSTL documentation and all I found was the following description:
Creates a URL with optional request parameters.
If the link to the CSS file is changed with the following sentence, the problem is resolved:
<%@taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %>
<link rel="stylesheet" type="text/css" href="<c:url value="/recursos/estilos/test.css" />" media="all" />
If any moderator sees this and knows an explanation of how this is resolved, I ask you to expose it here. Change my answer or comment on this please. I'm sure other people may have the same doubts as I do in the future.
Thank you all for your attention and time.
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The same thing happened to me and I found a solution. Hope this helps someone else:
As you can see in the error message, the paths you are using for resources /testeSpringMvc/path/to/recursos/estilos/test.css
are trying to resolve with Spring DispatchServlet.
This is because you have the following in your web.xml file:
<servlet-mapping>
<servlet-name>fronte</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>
The servlet fronte
will try to resolve anything that starts with /
.
Just add a simple extension to it <url-pattern>
. Something like <url-pattern>/*.html</url-pattern>
should do the job.
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Take a look at this blog post . Relevant excerpt:
If I want to apply main.css to url: www.mysite.com/index.html, I need to use the following construct in my HTML code:
< link href="resources/css/main.css" rel="stylesheet" type="text/css"/ >
If I want to apply main.css to url: www.mysite.com/some/location.html, I need to use the following construct in HTML code:
< link href="../resources/css/main.css" rel="stylesheet" type="text/css"/ >
As a possible workaround, maybe this could work:
<mvc:resources mapping="/**/recursos/**" location="/WEB-INF/recursos/" />
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