基于ssm框架springsecurity

概念:
Spring Security是spring采用AOP思想，基于servlet过滤器实现的安全框架。它提供了完善的认证机制和方法级的授权功能。是一款非常优秀的权限管理框架。

导入相关jar包

<dependency>
<groupId>org.springframework.security</groupId>
<artifactId>spring-security-config</artifactId>
<version>5.4.0</version>
</dependency>
<dependency>
<groupId>org.springframework.security</groupId>
<artifactId>spring-security-taglibs</artifactId>
<version>5.4.0</version>
</dependency>

配置web.xml文件

<!--Spring Security过滤器链，注意过滤器名称必须叫springSecurityFilterChain-->
    <filter>        <filter-name>springSecurityFilterChain</filter-name>
        <filter-class>
            org.springframework.web.filter.DelegatingFilterProxy
        </filter-class>
    </filter>
    <!--拦截路径-->
    <filter-mapping>
        <filter-name>springSecurityFilterChain</filter-name>
        <url-pattern>/*</url-pattern>
    </filter-mapping>

配置spring-security.xml文件

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xmlns:context="http://www.springframework.org/schema/context"
       xmlns:aop="http://www.springframework.org/schema/aop"
       xmlns:tx="http://www.springframework.org/schema/tx"
       xmlns:security="http://www.springframework.org/schema/security"
       xsi:schemaLocation="http://www.springframework.org/schema/beans
    http://www.springframework.org/schema/beans/spring-beans.xsd
 http://www.springframework.org/schema/context
  http://www.springframework.org/schema/context/spring-context.xsd
      http://www.springframework.org/schema/aop
          http://www.springframework.org/schema/aop/spring-aop.xsd
      http://www.springframework.org/schema/tx
    http://www.springframework.org/schema/tx/spring-tx.xsd
            http://www.springframework.org/schema/security
        http://www.springframework.org/schema/security/spring-security.xsd">
    <!--配置springsecurity-->
    <!--
    auto-config="true" 表示自动加载springsecurity的配置文件
    use-expressions="true" 表示使用spring的el表达式来配置springsecurity
    -->
    <security:http auto-config="true" use-expressions="true">
        <!--拦截器-->
        <!--pattern="/**" 表示拦截所有资源
        access="hasAnyRole('ROLE_USER')" 表示只有ROLE_USER角色才能访问资源
        -->
        <security:intercept-url pattern="/**" access="hasAnyRole('ROLE_USER')"/>
    </security:http>

    <!--设置Spring Security认证用户信息的来源-->
    <!--springsecurity默认的认证必须是加密的，加上(noop) 表示不加密认证。-->
    <security:authentication-manager>
        <security:authentication-provider>
            <security:user-service>
                <security:user name="user" password="{noop}user" authorities="ROLE_USER"/>
                <security:user name="admin" password="{noop}admin" authorities="ROLE_ADMIN"/>
            </security:user-service>
        </security:authentication-provider>
    </security:authentication-manager>


</beans>

QQ截图20200930205943.jpg

springsecurity过滤器链加载原理

QQ截图20201002160445.jpg

QQ截图20201002160519.jpg

QQ截图20201002160601.jpg

QQ截图20201002160714.jpg

QQ截图20201002160857.jpg

QQ截图20201002161402.jpg

QQ截图20201002163823.jpg

QQ截图20201002164959.jpg

 <!--去掉csfr拦截的过滤器-->
        <security:csrf disabled="true"/>
html页面
<%@taglib uri= "http://www.springframework.org/tags" prefix=" security"%>

<form action="${pageContext.request.contextPath}/login" method="post">
         <security:csrfInput/>  //在认证form表单内携带token

去掉csfr拦截的过滤器表示就没有起到过滤作用，从而导致${pageContext.request.contextPath}/login可以直接访问，而如果