springboot @Configuration @bean注解作用

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@Configuration注解可以达到在Spring中使用xml配置文件的作用

@Bean就等同于xml配置文件中的<bean>

在spring项目中我们集成第三方的框架如shiro会在spring.xml配置文件中进行配置，例如：

<!-- 配置shiro框架提供过滤器工厂 -->

    <bean id="shiroFilter" class="org.apache.shiro.spring.web.ShiroFilterFactoryBean">

        <!-- 注入shiro核心组件安全管理器 -->

        <property name="securityManager" ref="securityManager"></property>

        <!-- 注入相关页面 -->

        <property name="loginUrl" value="/login.jsp"></property>

        <property name="unauthorizedUrl" value="/unauthorized.jsp"></property>

        <!-- 配置过滤器链：配置项目发出url对应拦截规则：指定什么url要求具有什么样权限 -->

        <property name="filterChainDefinitions">

            <value>

                /css/**=anon

                /js/**=anon

                /validatecode.jsp*=anon

                /images/**=anon

                /login.jsp=anon

                /service/**=anon

                /**=authc

            </value>

        </property>

    </bean>

   <!-- 配置安全管理器 -->

    <bean id="securityManager" class="org.apache.shiro.web.mgt.DefaultWebSecurityManager">

         <property name="realms" ref="bosRealm"></property>

         <!-- 使用缓存 -->

         <property name="cacheManager" ref="cacheManager"></property>

    </bean>

    <!--  配置缓存管理器-->

    <bean id="cacheManager" class="org.apache.shiro.cache.ehcache.EhCacheManager">

         <!-- 加载ehcache的配置文件，指定缓存策略 -->

        <property name="cacheManager" ref="ehcacheManager"></property>

    </bean> 

    <!-- 开启shiro注解支持 -->

    <bean class="org.springframework.aop.framework.autoproxy.DefaultAdvisorAutoProxyCreator">

        <!-- 强制使用cglib代理 -->

        <property name="proxyTargetClass" value="true"></property>

    </bean>

    <!-- 配置切面  目的验权，判断当前用户是否有权限调用service层方法 -->

    <bean class="org.apache.shiro.spring.security.interceptor.AuthorizationAttributeSourceAdvisor"></bean>

在springboot与shiro整合：

@Configuration

public class ShiroConfig {

    @Bean

    public ShiroFilterFactoryBean shirFilter(SecurityManager securityManager) {

        ShiroFilterFactoryBean shiroFilterFactoryBean = new ShiroFilterFactoryBean();

        shiroFilterFactoryBean.setSecurityManager(securityManager);

        Map<String, String> filterChainDefinitionMap = new HashMap<String, String>();

        shiroFilterFactoryBean.setLoginUrl("/login");

        shiroFilterFactoryBean.setUnauthorizedUrl("/unauthc");

        shiroFilterFactoryBean.setSuccessUrl("/home/index");

        filterChainDefinitionMap.put("/*", "anon");

        filterChainDefinitionMap.put("/authc/index", "authc");

        return shiroFilterFactoryBean;

    }

    @Bean

    public HashedCredentialsMatcher hashedCredentialsMatcher() {

        HashedCredentialsMatcher hashedCredentialsMatcher = new HashedCredentialsMatcher();

        hashedCredentialsMatcher.setHashAlgorithmName(PasswordHelper.ALGORITHM_NAME);

        hashedCredentialsMatcher.setHashIterations(PasswordHelper.HASH_ITERATIONS);

        return hashedCredentialsMatcher;

    }

    @Bean

    public EnceladusShiroRealm shiroRealm() {

        EnceladusShiroRealm shiroRealm = new EnceladusShiroRealm();

        shiroRealm.setCredentialsMatcher(hashedCredentialsMatcher());

        return shiroRealm;

    }

    @Bean

    public SecurityManager securityManager() {

        DefaultWebSecurityManager securityManager = new DefaultWebSecurityManager();

        securityManager.setRealm(shiroRealm());

        return securityManager;

    }

    @Bean

    public PasswordHelper passwordHelper() {

        return new PasswordHelper();

    }

}