Spring Security3.1登陆验证(转)

声明：本文是转载的，用来学习用，还望原著见谅原著地址
一、前言
在上一篇http://blog.csdn.net/k10509806/archive/2011/04/28/6369131.aspx文章中，提到的MyUserDetailServiceImpl获取用户权限，在用户没有登陆的时候，Spring Security会让我们自动跳转到默认的登陆界面，但在实际应用绝大多数是用我们自己的登陆界面的，其中就包括一些我们自己的逻辑，比如验证码。所以本人又研究一下，终于摸清了一些如何配置自己的登陆界面的办法。在这里献丑了。
二、Spring Security的过滤器
通过DEBUG可以看到Spring Security的Filter的顺序
Security filter chain: [
ConcurrentSessionFilter
SecurityContextPersistenceFilter
LogoutFilter
MyUsernamePasswordAuthenticationFilter
RequestCacheAwareFilter
SecurityContextHolderAwareRequestFilter
RememberMeAuthenticationFilter
AnonymousAuthenticationFilter
SessionManagementFilter
ExceptionTranslationFilter
MySecurityFilter
FilterSecurityInterceptor
]
Spring Security的登陆验证用的就是MyUsernamePasswordAuthenticationFilter，所以要实现我们自己的验证，可以写一个类并继承MyUsernamePasswordAuthenticationFilter类，重写attemptAuthentication方法。

三、applicationContext-Security.xml配置

<?xml version="1.0" encoding="UTF-8"?>  <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-3.1.xsd">      <debug/>            <http pattern="/js/**" security="none"/>      <http pattern="/resource/**" security="none"></http>      <http pattern="/login.jsp" security="none"/>      <http use-expressions="true" entry-point-ref="authenticationProcessingFilterEntryPoint">          <logout/>          <!-- 实现免登陆验证 -->          <remember-me />          <session-management invalid-session-url="/timeout.jsp">              <concurrency-control max-sessions="10" error-if-maximum-exceeded="true" />          </session-management>          <custom-filter ref="loginFilter" position="FORM_LOGIN_FILTER"  />          <custom-filter ref="securityFilter" before="FILTER_SECURITY_INTERCEPTOR"/>      </http>      <!-- 登录验证器 -->      <beans:bean id="loginFilter"          class="com.huaxin.security.MyUsernamePasswordAuthenticationFilter">          <!-- 处理登录的action -->          <beans:property name="filterProcessesUrl" value="/j_spring_security_check"></beans:property>                  <!-- 验证成功后的处理-->          <beans:property name="authenticationSuccessHandler" ref="loginLogAuthenticationSuccessHandler"></beans:property>                  <!-- 验证失败后的处理-->          <beans:property name="authenticationFailureHandler" ref="simpleUrlAuthenticationFailureHandler"></beans:property>          <beans:property name="authenticationManager" ref="myAuthenticationManager"></beans:property>          <!-- 注入DAO为了查询相应的用户 -->          <beans:property name="usersDao" ref="usersDao"></beans:property>      </beans:bean>      <beans:bean id="loginLogAuthenticationSuccessHandler"          class="org.springframework.security.web.authentication.SavedRequestAwareAuthenticationSuccessHandler">          <beans:property name="defaultTargetUrl" value="/index.jsp"></beans:property>      </beans:bean>      <beans:bean id="simpleUrlAuthenticationFailureHandler"          class="org.springframework.security.web.authentication.SimpleUrlAuthenticationFailureHandler">          <!-- 可以配置相应的跳转方式。属性forwardToDestination为true采用forward false为sendRedirect -->          <beans:property name="defaultFailureUrl" value="/login.jsp"></beans:property>      </beans:bean>      <!-- 认证过滤器 -->      <beans:bean id="securityFilter" class="com.huaxin.security.MySecurityFilter">          <!-- 用户拥有的权限 -->          <beans:property name="authenticationManager" ref="myAuthenticationManager" />          <!-- 用户是否拥有所请求资源的权限 -->          <beans:property name="accessDecisionManager" ref="myAccessDecisionManager" />          <!-- 资源与权限对应关系 -->          <beans:property name="securityMetadataSource" ref="mySecurityMetadataSource" />      </beans:bean>      <!-- 实现了UserDetailsService的Bean -->      <authentication-manager alias="myAuthenticationManager">          <authentication-provider user-service-ref="myUserDetailServiceImpl" />      </authentication-manager>      <beans:bean id="myAccessDecisionManager" class="com.huaxin.security.MyAccessDecisionManager"></beans:bean>      <beans:bean id="mySecurityMetadataSource" class="com.huaxin.security.MySecurityMetadataSource">          <beans:constructor-arg name="resourcesDao" ref="resourcesDao"></beans:constructor-arg>      </beans:bean>      <beans:bean id="myUserDetailServiceImpl" class="com.huaxin.security.MyUserDetailServiceImpl">          <beans:property name="usersDao" ref="usersDao"></beans:property>      </beans:bean>      <!-- 未登录的切入点 -->      <beans:bean id="authenticationProcessingFilterEntryPoint" class="org.springframework.security.web.authentication.LoginUrlAuthenticationEntryPoint">          <beans:property name="loginFormUrl" value="/login.jsp"></beans:property>      </beans:bean>  </beans:beans>  

这里特别要说明一下，我们的标签不能配置auto-config，因为这样配置后，依然会采用Spring Security的Filter Chain会与下面我们配的custom-filter冲突，最好会抛异常。还有配置一个切入点entry-point-ref=”authenticationProcessingFilterEntryPoint”，为了在未登陆的时候，跳转到哪个页面，不配也会抛异常。
position表示替换掉Spring Security原来默认的登陆验证Filter。

四、MyUsernamePasswordAuthenticationFilter

package com.huaxin.security;  import javax.servlet.http.HttpServletRequest;  import javax.servlet.http.HttpServletResponse;  import javax.servlet.http.HttpSession;  import org.apache.commons.lang.xwork.StringUtils;  import org.springframework.security.authentication.AuthenticationServiceException;  import org.springframework.security.authentication.UsernamePasswordAuthenticationToken;  import org.springframework.security.core.Authentication;  import org.springframework.security.core.AuthenticationException;  import org.springframework.security.web.WebAttributes;  import org.springframework.security.web.authentication.UsernamePasswordAuthenticationFilter;  import com.huaxin.bean.Users;  import com.huaxin.dao.UsersDao;  /*  *   * UsernamePasswordAuthenticationFilter源码     attemptAuthentication         this.getAuthenticationManager()             ProviderManager.java                 authenticate(UsernamePasswordAuthenticationToken authRequest)                     AbstractUserDetailsAuthenticationProvider.java                         authenticate(Authentication authentication)                             P155 user = retrieveUser(username, (UsernamePasswordAuthenticationToken) authentication);                                 DaoAuthenticationProvider.java                                     P86 loadUserByUsername  */  public class MyUsernamePasswordAuthenticationFilter extends UsernamePasswordAuthenticationFilter{      public static final String VALIDATE_CODE = "validateCode";      public static final String USERNAME = "username";      public static final String PASSWORD = "password";      private UsersDao usersDao;      public UsersDao getUsersDao() {          return usersDao;      }      public void setUsersDao(UsersDao usersDao) {          this.usersDao = usersDao;      }      @Override      public Authentication attemptAuthentication(HttpServletRequest request, HttpServletResponse response) throws AuthenticationException {          if (!request.getMethod().equals("POST")) {              throw new AuthenticationServiceException("Authentication method not supported: " + request.getMethod());          }          //检测验证码          checkValidateCode(request);          String username = obtainUsername(request);          String password = obtainPassword(request);          //验证用户账号与密码是否对应          username = username.trim();          Users users = this.usersDao.findByName(username);          if(users == null || !users.getPassword().equals(password)) {      /*               在我们配置的simpleUrlAuthenticationFailureHandler处理登录失败的处理类在这么一段         这样我们可以在登录失败后，向用户提供相应的信息。         if (forwardToDestination) {             request.setAttribute(WebAttributes.AUTHENTICATION_EXCEPTION, exception);         } else {             HttpSession session = request.getSession(false);             if (session != null || allowSessionCreation) {                 request.getSession().setAttribute(WebAttributes.AUTHENTICATION_EXCEPTION, exception);             }         }      */              throw new AuthenticationServiceException("用户名或者密码错误！");           }          //UsernamePasswordAuthenticationToken实现 Authentication          UsernamePasswordAuthenticationToken authRequest = new UsernamePasswordAuthenticationToken(username, password);          // Place the last username attempted into HttpSession for views          // 允许子类设置详细属性          setDetails(request, authRequest);          // 运行UserDetailsService的loadUserByUsername 再次封装Authentication          return this.getAuthenticationManager().authenticate(authRequest);      }      protected void checkValidateCode(HttpServletRequest request) {           HttpSession session = request.getSession();          String sessionValidateCode = obtainSessionValidateCode(session);           //让上一次的验证码失效          session.setAttribute(VALIDATE_CODE, null);          String validateCodeParameter = obtainValidateCodeParameter(request);            if (StringUtils.isEmpty(validateCodeParameter) || !sessionValidateCode.equalsIgnoreCase(validateCodeParameter)) {                throw new AuthenticationServiceException("验证码错误！");            }        }      private String obtainValidateCodeParameter(HttpServletRequest request) {          Object obj = request.getParameter(VALIDATE_CODE);          return null == obj ? "" : obj.toString();      }      protected String obtainSessionValidateCode(HttpSession session) {          Object obj = session.getAttribute(VALIDATE_CODE);          return null == obj ? "" : obj.toString();      }      @Override      protected String obtainUsername(HttpServletRequest request) {          Object obj = request.getParameter(USERNAME);          return null == obj ? "" : obj.toString();      }      @Override      protected String obtainPassword(HttpServletRequest request) {          Object obj = request.getParameter(PASSWORD);          return null == obj ? "" : obj.toString();      }  }  

有时间，大家看看源码吧。
五、login.jsp

body>    <span style="color:red"><%=session.getAttribute(WebAttributes.AUTHENTICATION_EXCEPTION) %></span>     <form action="j_spring_security_check" method="post">      Account：<Input name="username"/><br/>      Password：<input name="password" type="password"/><br/>      <input value="submit" type="submit"/>     </form>   </body>  

六、完了，源码大家可以看下我上一篇文章http://blog.csdn.net/k10509806/archive/2011/04/28/6369131.aspx。