cas是什麼我就不累贅說了。就簡單說下大體的流程。首先,cas是一個獨立的項目。就是一個war包,部署在tomcat上面啓動就ok。而後咱們要實現單點登錄,無疑是訪問系統1,若是沒有登陸,就跳轉到cas服務器上面,而後進行登錄,登錄ok以後,又從cas服務跳轉到系統1的界面,而後訪問系統2的時候,直接就能夠訪問了,不用再次登錄。你要問如何實現各類跳轉呢?那就須要咱們在cas服務上和咱們的子系統上面作出相應的配置的就ok。不用寫代碼。很爽有木有。css
CAS默認使用的是HTTPS協議,若是使用HTTPS協議須要SSL安全證書(需向特定的機構申請和購買) 。若是對安全要求不高或是在開發測試階段,可以使用HTTP協議。咱們這裏講解經過修改配置,讓CAS使用HTTP協議。html
(1)修改cas的WEB-INF/deployerConfigContext.xml java
找到下面的配置mysql
<bean class="org.jasig.cas.authentication.handler.support.HttpBasedServiceCredentialsAuthenticationHandler" p:httpClient-ref="httpClient"/>
這裏須要增長參數p:requireSecure="false",requireSecure屬性意思爲是否須要安全驗證,即HTTPS,false爲不採用web
(2)修改cas的/WEB-INF/spring-configuration/ticketGrantingTicketCookieGenerator.xmlspring
找到下面配置sql
<bean id="ticketGrantingTicketCookieGenerator" class="org.jasig.cas.web.support.CookieRetrievingCookieGenerator" p:cookieSecure="true" p:cookieMaxAge="-1" p:cookieName="CASTGC" p:cookiePath="/cas" />
參數p:cookieSecure="true",同理爲HTTPS驗證相關,TRUE爲採用HTTPS驗證,FALSE爲不採用https驗證。數據庫
參數p:cookieMaxAge="-1",是COOKIE的最大生命週期,-1爲無生命週期,即只在當前打開的窗口有效,關閉或從新打開其它窗口,仍會要求驗證。能夠根據須要修改成大於0的數字,好比3600等,意思是在3600秒內,打開任意窗口,都不須要驗證。express
咱們這裏將cookieSecure改成false , cookieMaxAge 改成3600apache
(3)修改cas的WEB-INF/spring-configuration/warnCookieGenerator.xml
找到下面配置
<bean id="warnCookieGenerator" class="org.jasig.cas.web.support.CookieRetrievingCookieGenerator" p:cookieSecure="true" p:cookieMaxAge="-1" p:cookieName="CASPRIVACY" p:cookiePath="/cas" />
咱們這裏將cookieSecure改成false , cookieMaxAge 改成3600
你能夠建兩個maven的web項目,只須要修改web.xml和pom.xml便可。
pom.xml
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"> <modelVersion>4.0.0</modelVersion> <groupId>cn.itcast.demo</groupId> <artifactId>casclient_demo1</artifactId> <version>0.0.1-SNAPSHOT</version> <packaging>war</packaging> <dependencies> <!-- cas --> <dependency> <groupId>org.jasig.cas.client</groupId> <artifactId>cas-client-core</artifactId> <version>3.3.3</version> </dependency> <dependency> <groupId>javax.servlet</groupId> <artifactId>servlet-api</artifactId> <version>2.5</version> <scope>provided</scope> </dependency> </dependencies> <build> <plugins> <plugin> <groupId>org.apache.maven.plugins</groupId> <artifactId>maven-compiler-plugin</artifactId> <version>2.3.2</version> <configuration> <source>1.7</source> <target>1.7</target> </configuration> </plugin> <plugin> <groupId>org.apache.tomcat.maven</groupId> <artifactId>tomcat7-maven-plugin</artifactId> <configuration> <!-- 指定端口 --> <port>9001</port> <!-- 請求路徑 --> <path>/</path> </configuration> </plugin> </plugins> </build> </project>
web.xml
<?xml version="1.0" encoding="UTF-8"?> <web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" version="2.5"> <!-- ======================== 單點登陸開始 ======================== --> <!-- 用於單點退出,該過濾器用於實現單點登出功能,可選配置 --> <listener> <listener-class>org.jasig.cas.client.session.SingleSignOutHttpSessionListener</listener-class> </listener> <!-- 該過濾器用於實現單點登出功能,可選配置。 --> <filter> <filter-name>CAS Single Sign Out Filter</filter-name> <filter-class>org.jasig.cas.client.session.SingleSignOutFilter</filter-class> </filter> <filter-mapping> <filter-name>CAS Single Sign Out Filter</filter-name> <url-pattern>/*</url-pattern> </filter-mapping> <!-- 該過濾器負責用戶的認證工做,必須啓用它 --> <filter> <filter-name>CASFilter</filter-name> <filter-class>org.jasig.cas.client.authentication.AuthenticationFilter</filter-class> <init-param> <param-name>casServerLoginUrl</param-name> <param-value>http://localhost:9080/cas/login</param-value> <!--這裏的server是服務端的IP --> </init-param> <init-param> <!--當前項目的url地址--> <param-name>serverName</param-name> <param-value>http://localhost:9001</param-value> </init-param> </filter> <filter-mapping> <filter-name>CASFilter</filter-name> <url-pattern>/*</url-pattern> </filter-mapping> <!-- 該過濾器負責對Ticket的校驗工做,必須啓用它 --> <filter> <filter-name>CAS Validation Filter</filter-name> <filter-class> org.jasig.cas.client.validation.Cas20ProxyReceivingTicketValidationFilter</filter-class> <init-param> <param-name>casServerUrlPrefix</param-name> <param-value>http://localhost:9080/cas</param-value> </init-param> <init-param> <!--當前項目的url地址--> <param-name>serverName</param-name> <param-value>http://localhost:9001</param-value> </init-param> </filter> <filter-mapping> <filter-name>CAS Validation Filter</filter-name> <url-pattern>/*</url-pattern> </filter-mapping> <!-- 該過濾器負責實現HttpServletRequest請求的包裹, 好比容許開發者經過HttpServletRequest的getRemoteUser()方法得到SSO登陸用戶的登陸名,可選配置。 --> <filter> <filter-name>CAS HttpServletRequest Wrapper Filter</filter-name> <filter-class> org.jasig.cas.client.util.HttpServletRequestWrapperFilter</filter-class> </filter> <filter-mapping> <filter-name>CAS HttpServletRequest Wrapper Filter</filter-name> <url-pattern>/*</url-pattern> </filter-mapping> <!-- 該過濾器使得開發者能夠經過org.jasig.cas.client.util.AssertionHolder來獲取用戶的登陸名。 好比AssertionHolder.getAssertion().getPrincipal().getName()。 --> <filter> <filter-name>CAS Assertion Thread Local Filter</filter-name> <filter-class>org.jasig.cas.client.util.AssertionThreadLocalFilter</filter-class> </filter> <filter-mapping> <filter-name>CAS Assertion Thread Local Filter</filter-name> <url-pattern>/*</url-pattern> </filter-mapping> <!-- ======================== 單點登陸結束 ======================== --> </web-app>
地址欄輸入 http://localhost:9100/cas/logout
但咱們更但願退出登陸後,能自動跳轉到某個頁面,那如何處理呢?
修改cas系統的配置文件cas-servlet.xml
<bean id="logoutAction" class="org.jasig.cas.web.flow.LogoutAction" p:servicesManager-ref="servicesManager" p:followServiceRedirects="${cas.logout.followServiceRedirects:true}"/>
改成true後,能夠在退出時跳轉頁面到目標頁面,修改index.jsp的退出連接
<a href="http://localhost:9100/cas/logout?service=http://www.baidu.com">退出登陸</a>
(1)修改cas服務端中web-inf下deployerConfigContext.xml ,添加以下配置
<!-- c3p0鏈接數據庫 -->
<bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource" p:driverClass="com.mysql.jdbc.Driver" p:jdbcUrl="jdbc:mysql://127.0.0.1:3306/pinyougoudb?characterEncoding=utf8" p:user="root" p:password="123456" />
<!-- 密碼加密 --> <bean id="passwordEncoder" class="org.jasig.cas.authentication.handler.DefaultPasswordEncoder" c:encodingAlgorithm="MD5" p:characterEncoding="UTF-8" />
<!-- 訪問表 --> <bean id="dbAuthHandler" class="org.jasig.cas.adaptors.jdbc.QueryDatabaseAuthenticationHandler" p:dataSource-ref="dataSource" p:sql="select password from tb_user where username = ?" p:passwordEncoder-ref="passwordEncoder"/>
而後在配置文件開始部分找到以下配置
<bean id="authenticationManager" class="org.jasig.cas.authentication.PolicyBasedAuthenticationManager"> <constructor-arg> <map> <entry key-ref="proxyAuthenticationHandler" value-ref="proxyPrincipalResolver" /> <entry key-ref="primaryAuthenticationHandler" value-ref="primaryPrincipalResolver" /> </map> </constructor-arg> <property name="authenticationPolicy"> <bean class="org.jasig.cas.authentication.AnyAuthenticationPolicy" /> </property> </bean>
其中
<entry key-ref="primaryAuthenticationHandler" value-ref="primaryPrincipalResolver" />
一句是使用固定的用戶名和密碼,咱們在下面能夠看到這兩個bean ,若是咱們使用數據庫認證用戶名和密碼,須要將這句註釋掉。
添加下面這一句配置
<entry key-ref="dbAuthHandler" value-ref="primaryPrincipalResolver"/>
(3)將如下三個jar包放入webapps\cas\WEB-INF\lib下
(1)將你項目須要的登錄頁login.html拷貝到cas系統下WEB-INF\view\jsp\default\ui 目錄下
(2)將css js等文件夾拷貝到 cas目錄下
(3) 將原來的casLoginView.jsp 更名(能夠爲以後的修改操做作參照),將login.html更名爲casLoginView.jsp
編輯casLoginView.jsp 內容
(1)添加指令
<%@ page pageEncoding="UTF-8" %> <%@ page contentType="text/html; charset=UTF-8" %> <%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %> <%@ taglib prefix="spring" uri="http://www.springframework.org/tags" %> <%@ taglib prefix="form" uri="http://www.springframework.org/tags/form" %> <%@ taglib prefix="fn" uri="http://java.sun.com/jsp/jstl/functions" %>
(2)修改form標籤
<form:form method="post" id="fm1" commandName="${commandName}" htmlEscape="true" class="sui-form"> ...... </form:form>
(3)修改用戶名框
<form:input id="username" tabindex="1" accesskey="${userNameAccessKey}" path="username" autocomplete="off" htmlEscape="true" placeholder="郵箱/用戶名/手機號" class="span2 input-xfat" />
(4)修改密碼框
<form:password id="password" tabindex="2" path="password" accesskey="${passwordAccessKey}" htmlEscape="true" autocomplete="off" placeholder="請輸入密碼" class="span2 input-xfat" />
(5)修改登錄按鈕
<input type="hidden" name="lt" value="${loginTicket}" />
<input type="hidden" name="execution" value="${flowExecutionKey}" />
<input type="hidden" name="_eventId" value="submit" />
<input class="sui-btn btn-block btn-xlarge btn-danger" accesskey="l" value="登錄" type="submit" />
在表單內加入錯誤提示框
<form:errors path="*" id="msg" cssClass="errors" element="div" htmlEscape="false" />
測試:輸入錯誤的用戶名和密碼,提示是英文。這個提示信息是在WEB-INF\classes目錄下的messages.properties文件中
authenticationFailure.AccountNotFoundException=Invalid credentials.
authenticationFailure.FailedLoginException=Invalid credentials.
設置國際化爲zn_CN ,修改cas-servlet.xml
<bean id="localeResolver" class="org.springframework.web.servlet.i18n.CookieLocaleResolver" p:defaultLocale="zh_CN" />
咱們須要將此信息拷貝到messages_zh_CN.properties下,並改成中文提示(轉碼)
authenticationFailure.AccountNotFoundException=\u7528\u6237\u4E0D\u5B58\u5728.
authenticationFailure.FailedLoginException=\u5BC6\u7801\u9519\u8BEF.
(1)引入依賴
<dependency> <groupId>org.springframework.security</groupId> <artifactId>spring-security-cas</artifactId> <version>4.1.0.RELEASE</version> </dependency> <dependency> <groupId>org.jasig.cas.client</groupId> <artifactId>cas-client-core</artifactId> <version>3.3.3</version> <exclusions> <exclusion> <groupId>org.slf4j</groupId> <artifactId>log4j-over-slf4j</artifactId> </exclusion> </exclusions> </dependency>
(2)修改spring-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.xsd http://www.springframework.org/schema/security http://www.springframework.org/schema/security/spring-security.xsd"> <!-- entry-point-ref 入口點引用 --> <http use-expressions="false" entry-point-ref="casProcessingFilterEntryPoint"> <intercept-url pattern="/**" access="ROLE_USER"/> <csrf disabled="true"/> <!-- custom-filter爲過濾器, position 表示將過濾器放在指定的位置上,before表示放在指定位置以前 ,after表示放在指定的位置以後 --> <custom-filter ref="casAuthenticationFilter" position="CAS_FILTER" /> <custom-filter ref="requestSingleLogoutFilter" before="LOGOUT_FILTER"/> <custom-filter ref="singleLogoutFilter" before="CAS_FILTER"/> </http> <!-- CAS入口點 開始 --> <beans:bean id="casProcessingFilterEntryPoint" class="org.springframework.security.cas.web.CasAuthenticationEntryPoint"> <!-- 單點登陸服務器登陸URL --> <beans:property name="loginUrl" value="http://localhost:9100/cas/login"/> <beans:property name="serviceProperties" ref="serviceProperties"/> </beans:bean> <beans:bean id="serviceProperties" class="org.springframework.security.cas.ServiceProperties"> <!--service 配置自身工程的根地址+/login/cas --> <beans:property name="service" value="http://localhost:9003/login/cas"/> </beans:bean> <!-- CAS入口點 結束 --> <!-- 認證過濾器 開始 --> <beans:bean id="casAuthenticationFilter" class="org.springframework.security.cas.web.CasAuthenticationFilter"> <beans:property name="authenticationManager" ref="authenticationManager"/> </beans:bean> <!-- 認證管理器 --> <authentication-manager alias="authenticationManager"> <authentication-provider ref="casAuthenticationProvider"> </authentication-provider> </authentication-manager> <!-- 認證提供者 --> <beans:bean id="casAuthenticationProvider" class="org.springframework.security.cas.authentication.CasAuthenticationProvider"> <beans:property name="authenticationUserDetailsService"> <beans:bean class="org.springframework.security.core.userdetails.UserDetailsByNameServiceWrapper"> <beans:constructor-arg ref="userDetailsService" /> </beans:bean> </beans:property> <beans:property name="serviceProperties" ref="serviceProperties"/> <!-- ticketValidator 爲票據驗證器 --> <beans:property name="ticketValidator"> <beans:bean class="org.jasig.cas.client.validation.Cas20ServiceTicketValidator"> <beans:constructor-arg index="0" value="http://localhost:9100/cas"/> </beans:bean> </beans:property> <beans:property name="key" value="an_id_for_this_auth_provider_only"/> </beans:bean> <!-- 認證類 --> <beans:bean id="userDetailsService" class="cn.itcast.demo.service.UserDetailServiceImpl"/> <!-- 認證過濾器 結束 --> <!-- 單點登出 開始 --> <beans:bean id="singleLogoutFilter" class="org.jasig.cas.client.session.SingleSignOutFilter"/> <beans:bean id="requestSingleLogoutFilter" class="org.springframework.security.web.authentication.logout.LogoutFilter"> <beans:constructor-arg value="http://localhost:9100/cas/logout?service=http://www.baidu.com"/> <beans:constructor-arg> <beans:bean class="org.springframework.security.web.authentication.logout.SecurityContextLogoutHandler"/> </beans:constructor-arg> <beans:property name="filterProcessesUrl" value="/logout/cas"/> </beans:bean> <!-- 單點登出 結束 --> </beans:beans>
(3)建立UserDetailsServiceImpl 實際上是馬後炮,由於認證的功能cas提早認證過了,他的做用只是獲得用戶權限返回。
/** * 認證類 */ public class UserDetailServiceImpl implements UserDetailsService { @Override public UserDetails loadUserByUsername(String username) throws UsernameNotFoundException { //構建角色集合 List<GrantedAuthority> authorities=new ArrayList(); authorities.add(new SimpleGrantedAuthority("ROLE_USER")); return new User(username, "" , authorities); } }
這個類的主要做用是在登錄後獲得用戶名,能夠根據用戶名查詢角色或執行一些邏輯。