关于使用springframework.security的问题?报错

今天想试试spring提供的security,于是下载了jar包进行配置：

spring-security-config-4.1.3.RELEASE

spring-security-core-4.1.3.RELEASE

spring-security-web-4.1.3.RELEASE

跟着教程走，通过java代码进行配置DelegatingFilterProxy，让类继承AbstractSecurityWebApplicationInitializer。

package cn.net.bysoft.config;

import org.springframework.security.web.context.AbstractSecurityWebApplicationInitializer;

public class SecurityWebInitializer extends AbstractSecurityWebApplicationInitializer {

}

结果开启tomcat后报错了：

九月 26, 2016 11:20:14 下午 org.apache.catalina.core.StandardContext filterStart
严重: Exception starting filter springSecurityFilterChain
org.springframework.beans.factory.NoSuchBeanDefinitionException: No bean named 'springSecurityFilterChain' is defined
	at org.springframework.beans.factory.support.DefaultListableBeanFactory.getBeanDefinition(DefaultListableBeanFactory.java:698)
	at org.springframework.beans.factory.support.AbstractBeanFactory.getMergedLocalBeanDefinition(AbstractBeanFactory.java:1175)
	at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:284)
	at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:202)
	at org.springframework.context.support.AbstractApplicationContext.getBean(AbstractApplicationContext.java:1060)
	at org.springframework.web.filter.DelegatingFilterProxy.initDelegate(DelegatingFilterProxy.java:326)
	at org.springframework.web.filter.DelegatingFilterProxy.initFilterBean(DelegatingFilterProxy.java:235)
	at org.springframework.web.filter.GenericFilterBean.init(GenericFilterBean.java:199)
	at org.apache.catalina.core.ApplicationFilterConfig.initFilter(ApplicationFilterConfig.java:279)
	at org.apache.catalina.core.ApplicationFilterConfig.<init>(ApplicationFilterConfig.java:109)
	at org.apache.catalina.core.StandardContext.filterStart(StandardContext.java:4917)
	at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5609)
	at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
	at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1574)
	at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1564)
	at java.util.concurrent.FutureTask.run(Unknown Source)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
	at java.lang.Thread.run(Unknown Source)