下面讲述Acegi完成的表单功能验证包括RememberMe服务：
1.首先在FilterChainProxy过滤器链中配置用于表单认证的如下过滤器：authenticationProcessingFilter,rememberMeProcessingFilter
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/**=httpSessionContextIntegrationFilter,logoutFilter,authenticationProcessingFilter,rememberMeProcessingFilter,exceptionTranslationFilter,filterInvocationInterceptor
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2.配置AuthenticationProcessingFilter：
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<bean id="authenticationProcessingFilter" class="org.acegisecurity.ui.webapp.AuthenticationProcessingFilter">
<property name="authenticationManager"><ref bean="authenticationManager"/></property>
//用户名或者密码错误时候转向的页面
<property name="authenticationFailureUrl"><value>/acegilogin.jsp?login_error=1</value></property>
//成功后进入的页面
<property name="defaultTargetUrl"><value>/</value></property>
//form表单中action
<property name="filterProcessesUrl"><value>/j_acegi_security_check</value></property>
<property name="rememberMeServices"><ref local="rememberMeServices"/></property>
</bean>
<bean id="authenticationProcessingFilterEntryPoint" class="org.acegisecurity.ui.webapp.AuthenticationProcessingFilterEntryPoint">
<property name="loginFormUrl"><value>/acegilogin.jsp</value></property>
<property name="forceHttps"><value>false</value></property>
<property name="serverSideRedirect" value="false"></property>
</bean>
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RememberMe服务：
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<bean id="rememberMeServices" class="org.acegisecurity.ui.rememberme.TokenBasedRememberMeServices">
<property name="userDetailsService"><ref local="jdbcDaoImpl"/></property>
<property name="key"><value>springRocks</value></property>
//对应登陆页面的复选框名称
<property name="parameter" value="rememberMeContactsForm"></property>
</bean>
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在ExceprionTranslationFilter中注册：
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<bean id="exceptionTranslationFilter"
class="org.acegisecurity.ui.ExceptionTranslationFilter">
<property name="authenticationEntryPoint"><ref local="authenticationProcessingFilterEntryPoint"/></property>
//登陆成功但是没有权限时，转向的页面
<property name="accessDeniedHandler">
<bean class="org.acegisecurity.ui.AccessDeniedHandlerImpl">
<property name="errorPage" value="/accessDenied.jsp"/>
</bean>
</property>
</bean>
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下面给出了登陆页面的内容：
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< pageEncoding="GBK" contentType="text/html; charset=GBK" %>
<%@ taglib prefix='c' uri='' %>
<%@ page import="org.acegisecurity.ui.AbstractProcessingFilter" %>
<%@ page import="org.acegisecurity.ui.webapp.AuthenticationProcessingFilter" %>
<%@ page import="org.acegisecurity.AuthenticationException" %>
登录
登录
Valid users:
username marissa, password koala
username dianne, password emu
username scott, password wombat
username peter, password opal (user disabled)
username bill, password wombat
username bob, password wombat
username jane, password wombat
<%-- this form-login-page form is also used as the
form-error-page to ask for a login again.
--%>
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控制并发的HttpSession和RememberMe服务冲突，他们不能够同时使用！
在FilterChainProxy中加入：
/**=concurrentSessionFilter
配置：
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<bean id="concurrentSessionFilter" class="org.acegisecurity.concurrent.ConcurrentSessionFilter">
<property name="sessionRegistry" ref="sessionRegistry"></property>
<property name="expiredUrl"><value>/hello.htm</value></property>
</bean>
<bean id="sessionRegistry" class="org.acegisecurity.concurrent.SessionRegistryImpl"></bean>
<bean id="concurrentSessionController" class="org.acegisecurity.concurrent.ConcurrentSessionControllerImpl">
<property name="maximumSessions" value="1"></property>
<property name="sessionRegistry" ref="sessionRegistry"></property>
<property name="exceptionIfMaximumExceeded" value="false"></property>
</bean>
<bean id="authenticationManager" class="org.acegisecurity.providers.ProviderManager">
<property name="providers">
<list>
<ref local="daoAuthenticationProvider"/>
<ref local="anonymousAuthenticationProvider"/>
<ref local="rememberMeAuthenticationProvider"/>
</list>
</property>
<property name="sessionController" ref="concurrentSessionController"></property>
</bean>
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在web.xml中加入：
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<listener>
<listener-class>org.acegisecurity.ui.session.HttpSessionEventPublisher</listener-class>
</listener>
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切换用户：
比如marissa用户具有ROLE_USER,ROLE_SUPERVISOR角色，那么marissa不需要m密码就可以切换到任意用户。
在FilterChainProxy中加入：
switchUserProcessingFilter
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<bean id="switchUserProcessingFilter" class="org.acegisecurity.ui.switchuser.SwitchUserProcessingFilter">
<property name="userDetailsService" ref="jdbcDaoImpl" />
<property name="switchUserUrl"><value>/j_acegi_switch_user</value></property>
<property name="exitUserUrl"><value>/j_acegi_exit_user</value></property>
//当用户切换成功时候，就会转换到下面指定的页面
<property name="targetUrl"><value>/secure/index.htm</value></property>
</bean>
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转换页面：
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%@page pageEncoding="GBK" contentType="text/html; charset=GBK" %>
<%@ taglib prefix='c' uri='' %>
<%@ page import="org.acegisecurity.ui.AbstractProcessingFilter" %>
<%@ page import="org.acegisecurity.ui.webapp.AuthenticationProcessingFilter" %>
<%@ page import="org.acegisecurity.AuthenticationException" %>
<html>
<head>
<title>Switch User</title>
</head>
<body>
<h1>Switch to User</h1>
<P>Valid users:
<P>
<P>username <b>marissa</b>, password <b>koala</b>
<P>username <b>dianne</b>, password <b>emu</b>
<p>username <b>scott</b>, password <b>wombat</b>
<p>username <b>bill</b>, password <b>wombat</b>
<p>username <b>bob</b>, password <b>wombat</b>
<p>username <b>jane</b>, password <b>wombat</b>
<p>
<%-- this form-login-page form is also used as the
form-error-page to ask for a login again.
--%>
<c:if test="${not empty param.login_error}">
<font color="red">
Your 'su' attempt was not successful, try again.<BR><BR>
Reason: <%= ((AuthenticationException) session.getAttribute(AbstractProcessingFilter.ACEGI_SECURITY_LAST_EXCEPTION_KEY)).getMessage() %>
</font>
</c:if>
<form action="" method="POST">
<table>
<tr><td>User:</td><td><input type='text' name='j_username'></td></tr>
<tr><td colspan='2'><input name="switch" type="submit" value="Switch to User"></td></tr>
</table>
</form>
</body>
</html>
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退出页面：
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%@page pageEncoding="GBK" contentType="text/html; charset=GBK" %>
<%@ taglib prefix='c' uri='' %>
<%@ page import="org.acegisecurity.context.SecurityContextHolder" %>
<%@ page import="org.acegisecurity.Authentication" %>
<%@ page import="org.acegisecurity.ui.AbstractProcessingFilter" %>
<%@ page import="org.acegisecurity.ui.webapp.AuthenticationProcessingFilter" %>
<%@ page import="org.acegisecurity.AuthenticationException" %>
<html>
<head>
<title>Exit User</title>
</head>
<body>
<h1>Exit User</h1>
<c:if test="${not empty param.login_error}">
<font color="red">
Your 'Exit User' attempt was not successful, try again.<BR><BR>
Reason: <%= ((AuthenticationException) session.getAttribute(AbstractProcessingFilter.ACEGI_SECURITY_LAST_EXCEPTION_KEY)).getMessage() %>
</font>
</c:if>
<form action="" method="POST">
<table>
<tr><td>Current User:</td><td>
<%
Authentication auth = SecurityContextHolder.getContext().getAuthentication();
if (auth != null) { %>
<%= auth.getPrincipal().toString() %>
<% } %>
</td></tr>
<tr><td colspan='2'><input name="exit" type="submit" value="Exit"></td></tr>
</table>
</form>
</body>
</html>
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<bean id="filterInvocationInterceptor" class="org.acegisecurity.intercept.web.FilterSecurityInterceptor">
<property name="authenticationManager"><ref bean="authenticationManager"/></property>
<property name="accessDecisionManager"><ref local="httpRequestAccessDecisionManager"/></property>
<property name="objectDefinitionSource">
<value>
CONVERT_URL_TO_LOWERCASE_BEFORE_COMPARISON
PATTERN_TYPE_APACHE_ANT
/index.jsp=ROLE_ANONYMOUS,ROLE_USER
/hello.htm=ROLE_ANONYMOUS,ROLE_USER
/logoff.jsp=ROLE_ANONYMOUS,ROLE_USER
/switchuser.jsp=ROLE_SUPERVISOR
/j_acegi_switch_user=ROLE_SUPERVISOR
/acegilogin.jsp*=ROLE_ANONYMOUS,ROLE_USER
/**=ROLE_USER
</value>
</property>
</bean>
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在FilterChainProxy加入：
securityContextHolderAwareRequestFilter
配置如下：
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