SpringSecurity的简单入门

以下是大体思路

1、导入坐标

 <properties>
        <spring.version>4.2.4.RELEASE</spring.version>
    </properties>

    <dependencies>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-core</artifactId>
            <version>${spring.version}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-web</artifactId>
            <version>${spring.version}</version>
        </dependency>

        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-webmvc</artifactId>
            <version>${spring.version}</version>
        </dependency>

        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-context-support</artifactId>
            <version>${spring.version}</version>
        </dependency>

        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-test</artifactId>
            <version>${spring.version}</version>
        </dependency>

        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-huaweibc</artifactId>
            <version>${spring.version}</version>
        </dependency>

        <!--springSecurity需要引入的坐标-->
        <dependency>
            <groupId>org.springframework.security</groupId>
            <artifactId>spring-security-web</artifactId>
            <version>4.1.0.RELEASE</version>
        </dependency>

        <dependency>
            <groupId>org.springframework.security</groupId>
            <artifactId>spring-security-config</artifactId>
            <version>4.1.0.RELEASE</version>
        </dependency>

        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>servlet-api</artifactId>
            <version>2.5</version>
            <scope>provided</scope>
        </dependency>

2、web.xml

 配置spring提供的代理过滤器。web.xml中配置spring框架的代理过滤器DelegatingFilterProxy

    <!-- springSecurity相关配置-->
    <context-param>
        <param-name>contextConfigLocation</param-name>
        <param-value>classpath*:spring/spring-security.xml</param-value>
    </context-param>
    <listener>
        <listener-class>
            org.springframework.web.context.ContextLoaderListener
        </listener-class>
    </listener>

    <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>

3、spring-security配置文件

<?xml version="1.0" encoding="UTF-8"?>
<beans:beans xmlns="http://www.springframework.org/schema/security"
    xmlns:beans="http://www.springframework.org/schema/beans"
    xmlns:dubbo="http://code.alibabatech.com/schema/dubbo"
    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://code.alibabatech.com/schema/dubbo http://code.alibabatech.com/schema/dubbo/dubbo.xsd
                        http://www.springframework.org/schema/security http://www.springframework.org/schema/security/spring-security.xsd">
   
    <!-- 设置页面不登陆也可以访问 -->
    <http pattern="/*.html" security="none"></http>
    <http pattern="/css/**" security="none"></http>
    <http pattern="/img/**" security="none"></http>
    <http pattern="/js/**" security="none"></http>
    <http pattern="/plugins/**" security="none"></http>
　　<!--注册放行-->
    <http pattern="/seller/add.do" security="none"></http>

    <!-- 页面的拦截规则    use-expressions:是否启动SPEL表达式 默认是true -->
    <http use-expressions="false">
        <!-- 当前用户必须有ROLE_USER的角色 才可以访问根目录及所属子目录的资源 -->
        <intercept-url pattern="/**" access="ROLE_USER"/>
        <!-- 开启表单登陆功能 -->
        <form-login  login-page="/shoplogin.html" default-target-url="/admin/index.html" authentication-failure-url="/shoplogin.html" always-use-default-target="true"/>
        <csrf disabled="true"/>
        <!-- 为了解决前端iframe框架的不允许同窗口不同框跨域访问问题。访问问题默认是deny不允许访问，改成同一域下可以进行访问：默认为deny，如果是iframe页面管理页面会报x-frame-options，此处修改为sameorigin即可-->
        <headers>
            <frame-options policy="SAMEORIGIN"/>
        </headers>
<!--springSecurity的退出操作，我们什么都不写也可以，默认的controller访问路径为/logout-->
        <logout/>
    </http>
    
    <!-- 认证管理器 -->
    <authentication-manager>
        <authentication-provider user-service-ref="userDetailService"> 
<!--使用密码加密类，如果密码不需要加密注释下面即可-->   
            <password-encoder ref="bcryptEncoder"></password-encoder>
        </authentication-provider>    
    </authentication-manager>
        
    <!-- 认证类:该类是自定义类，实现了UserDetailsService接口，在该类中进行用户名和密码的判断 -->
    <beans:bean id="userDetailService" class="com.huawei.service.UserDetailsServiceImpl">
    <!--此处需要为UserDetailService的实现类中注入一个依赖sellerService，避免产生父子容器问题，如果过是单体项目不用不用考虑该问题，通过再实现类中@Autowired直接注入即可-->
        <beans:property name="sellerService" ref="sellerService"></beans:property>
    </beans:bean>
    
    <!-- 引用dubbo ,服务引用dubbo 服务，如果不使用分布式下面的可以注释掉 -->
    <dubbo:application name="huawei-shop-web" />
    <dubbo:registry address="zookeeper://127.0.0.1:2181"/>    
    <dubbo:reference id="sellerService" interface="com.huawei.sellergoods.service.SellerService"></dubbo:reference>
    
    <!--密码加密类，该类是使用的spring提供的加密类-->
    <beans:bean id="bcryptEncoder" class="org.springframework.security.crypto.bcrypt.BCryptPasswordEncoder"></beans:bean>
</beans:beans>

4、UserDetailService的实现类（把这个类加载进spring容器中采用xml配置，不要使用注解，避免父子容器问题）

public class UserDetailsServiceImpl implements UserDetailsService {
    private SellerService sellerService;
    public void setSellerService(SellerService sellerService) {
        this.sellerService = sellerService;
    }
    @Override
    public UserDetails loadUserByUsername(String name) throws UsernameNotFoundException {
       //完成认证授权功能
        //根据name查询数据库或者seller对象，seller对象需要sellergoods_service进行查询
        TbSeller seller = sellerService.findOne(name); //name就是sellerId
        //不仅根据sellerid找到该商家，而且还需要审核后
        if(seller!=null && "1".equals(seller.getStatus())){
            //拼接角色列表
            List<GrantedAuthority> authorities = new ArrayList<>();
            authorities.add(new SimpleGrantedAuthority("ROLE_USER"));
            //用户名  密码   角色列表
            return new User(name, seller.getPassword(), authorities);
        }
        return null;
    }
}

5、测试

直接运行测试，上方源码是搭建在分布式项目Dubbo+zookeeper运行的

6、拓展：

6.1、获取SpringSecurity中的用户信息

String name =SecurityContextHolder.getContext().getAuthentication().getName();