Spring Security使用数据库管理资源整理
1.网上常见的重写FilterInvocationDefinitionSource的做法
http://www.family168.com/oa/springsecurity/html/ch005-resource-db.html#d0e585
具体方法参照这里
http://www.iteye.com/topic/319965

此种方法存在一个问题：系统会在初始化时一次将所有资源加载到内存中，即使在数据库中修改了资源信息，系统也不会再次去从数据库中读取资源信息。这就造成了每次修改完数据库后，都需要重启系统才能时资源配置生效。
解决方案：如果数据库中的资源出现的变化，需要刷新内存中已加载的资源信息

2.SpringSide3新写了一个 FactoryBean，向默认的DefaultFilterInvocationDefinitionSource注入从 ResourceDetailService中返回的RequestMap.

springside中applicationContext-security.xml代码如下

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans" xmlns:s="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-2.5.xsd
                        http://www.springframework.org/schema/security http://www.springframework.org/schema/security/spring-security-2.0.4.xsd"
	default-autowire="byType" default-lazy-init="true">

	<description>SpringSecurity安全配置</description>

	<!-- http安全配置 -->
	<s:http auto-config="true" access-decision-manager-ref="accessDecisionManager">
		<s:form-login login-page="/login.action" default-target-url="/"
			authentication-failure-url="/login.action?error=true" />
		<s:logout logout-success-url="/" />
		<s:remember-me key="e37f4b31-0c45-11dd-bd0b-0800200c9a66" />
	</s:http>

	<!-- 认证配置 -->
	<s:authentication-provider user-service-ref="userDetailsService">
		<!-- 可设置hash使用sha1或md5散列密码后再存入数据库 -->
		<s:password-encoder hash="plaintext" />
	</s:authentication-provider>

	<!-- 项目实现的用户查询服务 -->
	<bean id="userDetailsService" class="org.springside.examples.miniweb.service.security.UserDetailsServiceImpl" />

	<!-- 重新定义的FilterSecurityInterceptor,使用databaseDefinitionSource提供的url-授权关系定义 -->
	<bean id="filterSecurityInterceptor" class="org.springframework.security.intercept.web.FilterSecurityInterceptor">
		<s:custom-filter before="FILTER_SECURITY_INTERCEPTOR" />
		<property name="accessDecisionManager" ref="accessDecisionManager" />
		<property name="objectDefinitionSource" ref="databaseDefinitionSource" />
	</bean>

	<!-- DefinitionSource工厂,使用resourceDetailsService提供的URL-授权关系. -->
	<bean id="databaseDefinitionSource" class="org.springside.modules.security.springsecurity.DefinitionSourceFactoryBean">
		<property name="resourceDetailsService" ref="resourceDetailsService" />
	</bean>
	
	<!-- 项目实现的URL-授权查询服务 -->
	<bean id="resourceDetailsService" class="org.springside.examples.miniweb.service.security.ResourceDetailsServiceImpl" />

	<!-- 授权判断配置, 将授权名称的默认前缀由ROLE_改为A_. -->
	<bean id="accessDecisionManager" class="org.springframework.security.vote.AffirmativeBased">
		<property name="decisionVoters">
			<list>
				<bean class="org.springframework.security.vote.RoleVoter">
					<property name="rolePrefix" value="A_" />
				</bean>
				<bean class="org.springframework.security.vote.AuthenticatedVoter" />
			</list>
		</property>
	</bean>
</beans>

springside具体代码参照这里
http://www.springside.org.cn/