Error 404 after change filter in web.xml
I'm trying to add Spring Security to the project.
After adding a block of code in web.xml, all url's give 404.

What is wrong?

It's a Maven project, Spring MVC, hibernate, postgres. 

(I do not know what information is relevant to describe the scenario)

    <?xml version="1.0" encoding="UTF-8"?>
    <web-app version="2.5" xmlns="http://java.sun.com/xml/ns/javaee"
    	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    	xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">
    
    	<!-- The definition of the Root Spring Container shared by all Servlets 
    		and Filters -->
    	<context-param>
    		<param-name>contextConfigLocation</param-name>
    		<param-value>/WEB-INF/spring/root-context.xml</param-value>
    	</context-param>  
    
    	<!-- Creates the Spring Container shared by all Servlets and Filters -->
    	<listener>
    		<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
    	</listener>
    
    	<!-- Processes application requests -->
    	<servlet>
    		<servlet-name>appServlet</servlet-name>
    		<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
    		<init-param>
    			<param-name>contextConfigLocation</param-name>
    			<param-value>/WEB-INF/spring/appServlet/servlet-context.xml</param-value>
    		</init-param>
    		<load-on-startup>1</load-on-startup>
    	</servlet>
    
    	<servlet-mapping>
    		<servlet-name>appServlet</servlet-name>
    		<url-pattern>/</url-pattern>
    	</servlet-mapping>
    
    	<filter>
    		<filter-name>encodingFilter</filter-name>
    		<filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
    		<init-param>
    			<param-name>encoding</param-name>
    			<param-value>UTF-8</param-value>
    		</init-param>
    		<init-param>
    			<param-name>forceEncoding</param-name>
    			<param-value>true</param-value>
    		</init-param>
    	</filter>
    	<filter-mapping>
    		<filter-name>encodingFilter</filter-name>
    		<url-pattern>/*</url-pattern>
    	</filter-mapping>
    	
    	<!-- After insert this block, all URL's return 404 error -->
    	<filter>
            <filter-name>springSecurityFilterChain</filter-name>
            <filter-class>org.springframework.web.filter.DelegatingFilterProxy</filter-class>
        </filter>
     
        <filter-mapping>
            <filter-name>springSecurityFilterChain</filter-name>
            <url-pattern>/*</url-pattern>
        </filter-mapping>
    
    
    </web-app>


Error 404 after change filter in web.xml
===

I'm trying to add Spring Security to the project.
After adding a block of code in web.xml, all url's give 404.

What is wrong?

It's a Maven project, Spring MVC, hibernate, postgres. 

(I do not know what information is relevant to describe the scenario)

    <?xml version="1.0" encoding="UTF-8"?>
    <web-app version="2.5" xmlns="http://java.sun.com/xml/ns/javaee"
    	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    	xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">
    
    	<!-- The definition of the Root Spring Container shared by all Servlets 
    		and Filters -->
    	<context-param>
    		<param-name>contextConfigLocation</param-name>
    		<param-value>/WEB-INF/spring/root-context.xml</param-value>
    	</context-param>  
    
    	<!-- Creates the Spring Container shared by all Servlets and Filters -->
    	<listener>
    		<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
    	</listener>
    
    	<!-- Processes application requests -->
    	<servlet>
    		<servlet-name>appServlet</servlet-name>
    		<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
    		<init-param>
    			<param-name>contextConfigLocation</param-name>
    			<param-value>/WEB-INF/spring/appServlet/servlet-context.xml</param-value>
    		</init-param>
    		<load-on-startup>1</load-on-startup>
    	</servlet>
    
    	<servlet-mapping>
    		<servlet-name>appServlet</servlet-name>
    		<url-pattern>/</url-pattern>
    	</servlet-mapping>
    
    	<filter>
    		<filter-name>encodingFilter</filter-name>
    		<filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
    		<init-param>
    			<param-name>encoding</param-name>
    			<param-value>UTF-8</param-value>
    		</init-param>
    		<init-param>
    			<param-name>forceEncoding</param-name>
    			<param-value>true</param-value>
    		</init-param>
    	</filter>
    	<filter-mapping>
    		<filter-name>encodingFilter</filter-name>
    		<url-pattern>/*</url-pattern>
    	</filter-mapping>
    	
    	<!-- After insert this block, all URL's return 404 error -->
    	<filter>
            <filter-name>springSecurityFilterChain</filter-name>
            <filter-class>org.springframework.web.filter.DelegatingFilterProxy</filter-class>
        </filter>
     
        <filter-mapping>
            <filter-name>springSecurityFilterChain</filter-name>
            <url-pattern>/*</url-pattern>
        </filter-mapping>
    
    
    </web-app>

