spring提供的登錄j_spring_security_check

第一步：form表單提交
<form id="formLogin" action="<%=request.getContextPath()%>/j_spring_security_check" method="post"></form>
第二步：配置文件applicationContext-security.xml
    <?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-3.0.xsd">
    <!-- 認證功能http配置 -->
    <!-- entry-point-ref 爲用戶第一次訪問受保護的url時的處理程序.  --> 
    <http use-expressions="true" entry-point-ref="authenticationEntryPoint">
        <!-- 這裏是拒絕用戶訪問的處理程序 -->
        <access-denied-handler ref="accessDeniedHandler" />
        <intercept-url pattern="/login.jsp*" access="permitAll"/>
        <intercept-url pattern="/**/*.js" access="permitAll"/>
        <intercept-url pattern="/**/*.jpg" access="permitAll"/>
        <intercept-url pattern="/**/*.gif" access="permitAll"/>
        <intercept-url pattern="/**/*.css" access="permitAll"/>
        <intercept-url pattern="/**/**.json*" access="permitAll"/>
        <!-- <intercept-url pattern="/contents/**.jsp*" access="isAuthenticated()"/> -->
        <intercept-url pattern="/**/*.html*" access="permitAll"/>
        <intercept-url pattern="/**/*.jsp*" access="permitAll"/>
        <custom-filter position="LOGOUT_FILTER" ref="secLogoutFilter" />     
        <custom-filter before="FILTER_SECURITY_INTERCEPTOR" ref="checkInfoFilter" />
        <custom-filter position="FORM_LOGIN_FILTER" ref="crmAuthFilter" />
        <!-- 限制用戶的最大登陸數,防止一個賬號被多人使用 -->
        <custom-filter position="CONCURRENT_SESSION_FILTER" ref="concurrencyFilter" />
        <session-management session-authentication-strategy-ref="crmSAS"/>
    </http>
      
    <!-- 登出 過濾器 -->
    <beans:bean id="secLogoutFilter"
        class="com.xxxx.crm.sec.common.SecLogoutFilter">
        <beans:constructor-arg ref="secLogoutSuccessHandler" />
        <beans:constructor-arg>
            <beans:list>
                <beans:bean
                    class="com.xxxx.crm.sec.common.SecLogoutHandler"></beans:bean>
            </beans:list>
        </beans:constructor-arg>
    </beans:bean>
      
    <!-- 登出 handler -->
    <beans:bean id="secLogoutSuccessHandler" class="com.xxxx.crm.sec.common.SecLogoutSuccessHandler">
        <beans:property name="defaultLogoutUrl" value="/login"></beans:property>
        <beans:property name="mLogoutUrl" value="/mlogin"></beans:property>
    </beans:bean>
      
    <!-- 登錄失敗 handler -->
    <beans:bean id="secAuthenticationFailureHandler" class="com.xxxx.crm.sec.common.SecAuthenticationFailureHandler">
        <beans:property name="defaultFailureUrl" value="/login"></beans:property>
        <beans:property name="customerFUrl" value="/login"></beans:property>
        <beans:property name="merchantFul" value="/mlogin"></beans:property>
    </beans:bean>
    <!-- 登錄成功 handler -->
    <beans:bean id="secAuthenticationSuccessHandler " class="com.xxxx.crm.sec.common.SecAuthenticationSuccessHandler">
        <beans:property name="defaultSuccessUrl" value="/commonLogin"></beans:property>
    </beans:bean>
      
    <!-- userDetailsService -->
    <beans:bean id="userDetailsServiceImpl" class="com.xxxx.crm.sec.xxxxUserDetailsServiceImpl"></beans:bean>
    <!-- AccessDecisionManager -->
    <beans:bean id="accessDecision" class="com.xxxx.crm.sec.AccessDecisionManagerImpl"></beans:bean>
      
    <!-- FilterInvocationSecurityMetadataSource -->
    <beans:bean id="accessMeta" class="com.xxxx.crm.sec.SecurityMetadataSourceImpl"></beans:bean>
    <!-- 認證功能管理器 -->
    <authentication-manager alias="authenticationManager">
        <authentication-provider ref="authenticationProvider"/>
    </authentication-manager>
      
    <!-- 認證功能實現 -->
    <beans:bean id="authenticationProvider" class="com.xxxx.crm.sec.SecurityDaoAuthenticationProvider">
        <beans:property name="userDetailsService" ref="userDetailsServiceImpl" />
        <beans:property name="hideUserNotFoundExceptions" value="false"/>
        <beans:property name="passwordEncoder" ref="md5PasswordEncoder"/>
    </beans:bean>
      
    <!-- 用戶動態設置session級別信息實現類  -->
    <beans:bean id="ctxSessionManager" class="com.xxxx.crm.sec.ctxsession.CtxSessionManager" />
      
    <!-- 用戶密碼加密或解密 -->
    <beans:bean id="md5PasswordEncoder" class="com.xxxx.crm.constance.MD5PasswordEncoder" /> 
    <beans:bean id="springMD5PasswordEncoder" class="com.xxxx.crm.constance.SpringMD5PasswordEncoder" />
    <beans:bean id="checkInfoFilter" class="com.xxxx.crm.sec.SecurityInterceptor">
        <beans:property name="authenticationManager" ref="authenticationManager" />
        <beans:property name="accessDecisionManager" ref="accessDecision" />
        <beans:property name="securityMetadataSource" ref="accessMeta" />
    </beans:bean>
      
    <!-- 定義上下文返回的消息的國際化。 -->
    <beans:bean id="messageSource"
      class="org.springframework.context.support.ReloadableResourceBundleMessageSource">
        <!--<beans:property name="basename"
         value="classpath:org/springframework/security/messages_zh_CN"/>
         -->
        <beans:property name="basename"
        value="classpath:securityMessage_zh_CN"/>       
    </beans:bean>
      
    <!-- ConcurrentSession過濾器 -->
    <beans:bean id="concurrencyFilter"
        class="org.springframework.security.web.session.ConcurrentSessionFilter">
        <beans:property name="sessionRegistry" ref="sessionRegistry" />
        <beans:property name="expiredUrl" value="/login" />
    </beans:bean>
      
    <beans:bean id="crmSAS" class="com.xxxx.crm.sec.ConcurrentSessionControlStrategy">
    <beans:constructor-arg name="sessionRegistry"
        ref="sessionRegistry" />
    <beans:property name="maximumSessions" value="1" />
    </beans:bean>
      
   <beans:bean id="loginUserParamManager" class="com.xxxx.crm.sec.common.LoginUserParamManager" factory-method="getInstance">
        <!--是否啓用重複登錄控制 -->
        <beans:property name="checkSessions" value="false"/>
        <!--重複登錄提示消息 -->
        <beans:property name="reloginMsg" value="當前用戶已在其它地方登錄。" />
    </beans:bean>
      
    <!-- CRM 權限過濾器 -->
    <beans:bean id="crmAuthFilter"
        class="com.xxxx.crm.sec.filter.AuthenticationFilter">
        <beans:property name="sessionAuthenticationStrategy"
            ref="crmSAS" />
        <beans:property name="authenticationManager" ref="authenticationManager" />
        <!-- <beans:property name="rememberMeServices" ref="rememberMeServices"></beans:property>-->
        <beans:property name="authenticationFailureHandler"
            ref="secAuthenticationFailureHandler" />
        <beans:property name="authenticationSuccessHandler"
            ref="secAuthenticationSuccessHandler" />
        <!-- <beans:property name="filterProcessesUrl" value="/ss_Login"></beans:property>  -->
    </beans:bean>
          
    <!-- SessionRegistryImpl -->
    <beans:bean id="sessionRegistry" class="com.xxxx.crm.sec.session.SecSessionRegistryImpl" />
      
    <!-- 訪問切入點 -->
    <beans:bean id="authenticationEntryPoint" class="org.springframework.security.web.authentication.LoginUrlAuthenticationEntryPoint">
        <beans:property name="loginFormUrl" value="/login" />
    </beans:bean>
      
    <!-- 認證被拒絕 -->
    <beans:bean id="accessDeniedHandler" class="org.springframework.security.web.access.AccessDeniedHandlerImpl">
        <beans:property name="errorPage" value="/login" />
    </beans:bean>
      
</beans:beans>
第三步：成功處理類
public class xxxxUserDetailsServiceImpl implements UserDetailsService { 
    private UserDetails merchantDetails(String name) {
        Connection conn = null;
        try {
            conn = ds.getConnection();
            StringBuffer mString = new StringBuffer(1000);
            mString.append(
                    "SELECT COUNT(1) AS TOTLE FROM xxxx_MERCHANT_INFO T WHERE T.USER_NAME = '")
                    .append(name).append("'");
            Statement stsm = conn.createStatement();
            ResultSet rs = stsm.executeQuery(mString.toString());
            int count = 0;
            if (rs.next()) {
                count = rs.getInt("TOTLE");
            }
            if (count == 0) {
                rs.close();
                stsm.close();
                UsernameNotFoundException unfe = new UsernameNotFoundException(
                        "用戶不存在或用戶名錯誤");
                throw unfe;
            } else if (count > 1) {
                rs.close();
                stsm.close();
                UsernameNotFoundException unfe = new UsernameNotFoundException(
                        "用戶信息配置錯誤");
                throw unfe;
            }
            mString.setLength(0);
            mString.append("SELECT MERCHANT_ID, USER_NAME, PASS_WORD, MERCHANT_NO, MERCHANT_NAME, EXPIRE_DATE, MERCHANT_ADDR, LINKMAN, LINK_PHONE, MAIL_ADDR, LEGAL_PERSON, MERCHANT_FULL_NAME, REGISTERED_CAPITAL, ORGANIZATION_CODE, MERCHANT_ORG, EVALUATION, STATUS, CREATED, CREATED_BY, UPDATED, UPDATED_BY FROM xxxx_MERCHANT_INFO ");
            mString.append("WHERE USER_NAME='").append(name).append("'");
            rs = stsm.executeQuery(mString.toString());
            xxxxUser<xxxxMerchantInfo> iAuser = null;
            if (rs.next()) {
                xxxxMerchantInfo info = new xxxxMerchantInfo();
                info.setUserName(rs.getString("USER_NAME"));
                info.setPassWord(rs.getString("PASS_WORD"));
                info.setMerchantId(rs.getString("MERCHANT_ID"));
                info.setMerchantNo(rs.getString("MERCHANT_NO"));
                info.setMerchantOrg(rs.getString("MERCHANT_ORG"));
                iAuser = new IxxxxMUser(info);
            }
            rs.close();
            stsm.close();
            return iAuser;
        } catch (SQLException e) {
            e.printStackTrace();
        } finally {
            if (null != conn) {
                try {
                    conn.close();
                } catch (SQLException e) {
                    e.printStackTrace();
                }
            }
        }
        return null;
    }
｝  
第四步：如果登錄失敗了頁面需要提示
<%
  if (session.getAttribute(WebAttributes.AUTHENTICATION_EXCEPTION) != null) {
%>
  <input type="hidden" id="errorMsg" name="errorMsg" value='${sessionScope.SPRING_SECURITY_LAST_EXCEPTION.message}' />
<%
        } else {
%>
    <input type="hidden" id="errorMsg" name="errorMsg" value='' />
<%
        }
    session.removeAttribute(WebAttributes.AUTHENTICATION_EXCEPTION);
%>
在js裏alert一下reeorMsg的值就可以了