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>