教你搭建SpringSecurity3框架（附源码）

源码下载地址：http://pan.baidu.com/s/1qWsgIg0

一、web.xml

<?xml version="1.0" encoding="UTF-8"?>

<web-app version="3.0" 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_3_0.xsd">

    <!-- 字符编码过滤器最好放最上面，最先加载，防止乱码 -->

    <filter>

        <filter-name>characterEncodingFilter</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>

            <description>强制进行转码 </description>

            <param-name>forceEncoding</param-name>

            <param-value>true</param-value>

        </init-param>

    </filter>

    <filter-mapping>

        <filter-name>characterEncodingFilter</filter-name>

        <url-pattern>/*</url-pattern>

    </filter-mapping>

    <!-- log4j -->

    <context-param>

        <param-name>log4jConfigLocation</param-name>

        <param-value>classpath:config/log4j.properties</param-value>

    </context-param>

    <listener>

        <listener-class>org.springframework.web.util.Log4jConfigListener</listener-class>

    </listener>

    <context-param>

        <param-name>contextConfigLocation</param-name>

        <param-value>classpath:config/applicationContext.xml,classpath:config/spring-security.xml</param-value>

    </context-param>

    <!-- SpringSecurity必须的核心过滤器优先配置，让SpringSecurity先加载，防止SpringSecurity拦截失效 -->

    <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>

    <listener>

        <!-- 在web.xml下面配置好监听，让服务器启动时就初始化该类，可以得到request -->

        <listener-class>org.springframework.web.context.request.RequestContextListener</listener-class>

    </listener>

    <!-- Spring需要加载的配置文件 -->

    <listener>

        <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>

    </listener>

    <!-- SpringMVC 默认所对应的配置文件是WEB-INF下的{servlet-name}-servlet.xml，这里便是：mvc-servlet.xml

        这里可以用 / 但不能用 /* ，拦截了所有请求会导致静态资源无法访问，所以要在servlet.xml中配置mvc:resources -->

    <servlet>

        <servlet-name>MVC</servlet-name>

        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>

        <init-param>

            <param-name>contextConfigLocation</param-name>

            <param-value>classpath:config/mvc-servlet.xml</param-value>

        </init-param>

    </servlet>

    <servlet-mapping>

        <servlet-name>MVC</servlet-name>

        <url-pattern>/</url-pattern>

    </servlet-mapping>

    <welcome-file-list>

        <welcome-file>/index.jsp</welcome-file>

    </welcome-file-list>

    <context-param>

        <param-name>webAppRootKey</param-name>

        <param-value>Security.root</param-value>

    </context-param>

    <session-config>

        <session-timeout>30</session-timeout>

    </session-config>

</web-app>

二、applicationContext.xml

<?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:mvc="http://www.springframework.org/schema/mvc"

    xsi:schemaLocation="http://www.springframework.org/schema/beans

               http://www.springframework.org/schema/beans/spring-beans-3.2.xsd

               http://www.springframework.org/schema/context

               http://www.springframework.org/schema/context/spring-context-3.2.xsd

            http://www.springframework.org/schema/mvc

            http://www.springframework.org/schema/mvc/spring-mvc-3.2.xsd">

    <!-- org.springframework.context.i18n.LocaleContextHolder -->

    <!-- <bean id="messageSource" class="org.springframework.context.support.ReloadableResourceBundleMessageSource">

        <property name="basename" value="classpath:org/springframework/security/messages"/>

        </bean> -->

</beans>

三、spring-security.xml

<?xml version="1.0" encoding="UTF-8"?>

<beans xmlns="http://www.springframework.org/schema/beans"

    xmlns:security="http://www.springframework.org/schema/security"

    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-3.2.xsd

    http://www.springframework.org/schema/security

    http://www.springframework.org/schema/security/spring-security-3.2.xsd">

    <!-- Spring-Security 的配置 -->

    <security:http auto-config="true" use-expressions="true"

        access-denied-page="/auth/denied">

        <security:intercept-url pattern="/auth/login"

            access="permitAll" />

        <security:intercept-url pattern="/main/common"

            access="ROLE_ADMIN,ROLE_USER" />

        <security:intercept-url pattern="/main/admin"

            access="ROLE_ADMIN" />

        <security:form-login login-page="/auth/login"

            authentication-failure-url="/auth/login?error=true"

            default-target-url="/main/common" />

        <security:logout invalidate-session="true"

            logout-success-url="/auth/login" logout-url="/auth/logout" />

        <security:custom-filter ref="customSecurityInterceptor"

            before="FILTER_SECURITY_INTERCEPTOR" />

    </security:http>

    <!-- 认证过滤器 -->

    <bean id="customSecurityInterceptor"

        class="com.candy.common.utils.security.CustomSecurityInterceptor">

        <!-- 用户拥有的权限 -->

        <property name="authenticationManager" ref="customAuthenticationManager" />

        <!-- 用户是否拥有所请求资源的权限 -->

        <property name="accessDecisionManager" ref="customAccessDecisionManager" />

        <!-- 资源与权限对应关系 -->

        <property name="securityMetadataSource" ref="customSecurityMetadataSource" />

    </bean>

    <!-- 实现了UserDetailsService的Bean -->

    <security:authentication-manager alias="customAuthenticationManager">

        <security:authentication-provider

            user-service-ref="customUserDetailsService">

            <security:password-encoder hash="md5" />

        </security:authentication-provider>

    </security:authentication-manager>

    <!-- 通过 customUserDetailsService,Spring会自动的用户的访问级别. 也可以理解成:以后我们和数据库操作就是通过customUserDetailsService来进行关联. -->

    <bean id="customUserDetailsService"

        class="com.candy.common.utils.security.CustomUserDetailsService"></bean>

    <!-- 访问决策器，决定某个用户具有的角色，是否有足够的权限去访问某个资源 -->

    <bean id="customAccessDecisionManager"

        class="com.candy.common.utils.security.CustomAccessDecisionManager"></bean>

    <!-- 资源源数据定义，即定义某一资源可以被哪些角色访问 -->

    <bean id="customSecurityMetadataSource"

        class="com.candy.common.utils.security.CustomSecurityMetadataSource"></bean>

</beans>

spring-security.xml命名空间配置，官方提供了两种配置方案
第一种、命名空间用beans开头，但是在配置中一直需要用<security:*>来配置。

<beans xmlns="http://www.springframework.org/schema/beans"

    xmlns:security="http://www.springframework.org/schema/security"

    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-3.0.xsd

          http://www.springframework.org/schema/security

          http://www.springframework.org/schema/security/spring-security.xsd">

    ...

</beans>

第二种、命名空间用security开头，在配置中不需要security前缀，但是bean的配置需要用<beans:bean>配置。

<beans:beans xmlns="http://www.springframework.org/schema/security"

    xmlns:beans="http://www.springframework.org/schema/beans" 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-3.0.xsd

           http://www.springframework.org/schema/security

           http://www.springframework.org/schema/security/spring-security.xsd">

    ...

</beans:beans>

四、mvc-servlet.xml

<?xml version="1.0" encoding="UTF-8"?>

<beans xmlns="http://www.springframework.org/schema/beans"

    xmlns:p="http://www.springframework.org/schema/p" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"

    xmlns:context="http://www.springframework.org/schema/context"

    xmlns:mvc="http://www.springframework.org/schema/mvc"

    xsi:schemaLocation="http://www.springframework.org/schema/beans

               http://www.springframework.org/schema/beans/spring-beans-3.2.xsd

               http://www.springframework.org/schema/context

               http://www.springframework.org/schema/context/spring-context-3.2.xsd

            http://www.springframework.org/schema/mvc

            http://www.springframework.org/schema/mvc/spring-mvc-3.2.xsd">

    <!-- 激活spring的注解. -->

    <context:annotation-config />

    <!-- 扫描注解组件并且自动的注入spring beans中. 例如,他会扫描@Controller 和@Service下的文件.所以确保此base-package设置正确. -->

    <context:component-scan base-package="com.candy.controller" />

    <!-- 配置注解驱动的Spring MVC Controller 的编程模型.注:次标签只在 Servlet MVC工作! -->

    <!-- SpringMVC通过JACKSON包，将responsebody中的对象转换为JSON -->

    <mvc:annotation-driven>

        <mvc:message-converters register-defaults="false">

            <bean id="jacksonMessageConverter"

                class="org.springframework.http.converter.json.MappingJacksonHttpMessageConverter" />

        </mvc:message-converters>

    </mvc:annotation-driven>

    <!-- 定义一个视图解析器 -->

    <bean id="viewResolver"

        class="org.springframework.web.servlet.view.InternalResourceViewResolver"

        p:prefix="/WEB-INF/jsp/" p:suffix=".jsp" />

    <!-- 处理静态资源 -->

    <mvc:default-servlet-handler />

</beans>  

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