上一节我们搭建了cas server。这一节我们将搭建两个客户端完成单点登录的测试。

1、前提约束

完成搭建cas server
https://www.jianshu.com/p/ed0c1359b82d

2、操作步骤

2.1 创建cas-client1，假设端口为9001
创建maven的web工程，名字为cas-client1，另一个工程名称为cas-client2
https://www.jianshu.com/p/042073b7710b
在pom.xml中加入以下依赖

        <dependency>
            <groupId>org.jasig.cas.client</groupId>
            <artifactId>cas-client-core</artifactId>
            <version>3.3.3</version>
        </dependency>
        <!-- Spring -->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-context</artifactId>
            <version>4.2.4.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-beans</artifactId>
            <version>4.2.4.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-webmvc</artifactId>
            <version>4.2.4.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-jdbc</artifactId>
            <version>4.2.4.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-aspects</artifactId>
            <version>4.2.4.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-jms</artifactId>
            <version>4.2.4.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-context-support</artifactId>
            <version>4.2.4.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-aop</artifactId>
            <version>4.2.4.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>servlet-api</artifactId>
            <version>2.5</version>
            <scope>provided</scope>
        </dependency>

修改web.xml

<!DOCTYPE web-app PUBLIC
        "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN"
        "http://java.sun.com/dtd/web-app_2_3.dtd" >

<web-app>
    <display-name>Archetype Created Web Application</display-name>
    <!-- 用于单点退出，该过滤器用于实现单点登出功能，可选配置 -->
    <listener>
        <listener-class>org.jasig.cas.client.session.SingleSignOutHttpSessionListener</listener-class>
    </listener>
    <!-- 该过滤器用于实现单点登出功能，可选配置。 -->
    <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>
    <!-- 该过滤器负责用户的认证工作，必须启用它 -->
    <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:8080/cas/login</param-value>
            <!--这里的server是服务端的IP -->
        </init-param>
        <init-param>
            <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>
    <!-- 该过滤器负责对Ticket的校验工作，必须启用它 -->
    <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:8080/cas</param-value>
        </init-param>
        <init-param>
            <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>
    <!-- 该过滤器负责实现HttpServletRequest请求的包裹， 比如允许开发者通过HttpServletRequest的getRemoteUser()方法获得SSO登录用户的登录名，可选配置。 -->
    <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>
    <!-- 该过滤器使得开发者可以通过org.jasig.cas.client.util.AssertionHolder来获取用户的登录名。 比如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>
    <servlet>
        <servlet-name>dispatcher</servlet-name>
        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
        <init-param>
            <param-name>contextConfigLocation</param-name>
            <param-value>classpath:spring-mvc.xml</param-value>
        </init-param>
        <load-on-startup>1</load-on-startup>
    </servlet>
    <servlet-mapping>
        <servlet-name>dispatcher</servlet-name>
        <url-pattern>/</url-pattern>
    </servlet-mapping>
</web-app>

在项目/src/main/resources下创建spring-mvc.xml

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xmlns:context="http://www.springframework.org/schema/context"
       xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd">

    <context:component-scan base-package="net.wanho.controller"></context:component-scan>
</beans>

在项目/src/main/java下创建net.wanho.controller包
在项目/src/main/java的net.wanho.controller包中创建UserController.java

package net.wanho.controller;

import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;

import javax.servlet.http.HttpSession;

@Controller
public class UserController {

    /**
     * 退出api,这里只需要提供一个api就行，不使用springmvc也是可以的
     */
    @RequestMapping("/logout")
    public String logout(HttpSession session) {
        session.invalidate();
        return "redirect:http://localhost:8080/cas/logout?service=http://www.baidu.com";
    }
}

在项目/src/main/webapp中创建index.jsp

<%@ page language="java" contentType="text/html; charset=utf-8"
         pageEncoding="utf-8" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
    <meta http-equiv="Content-Type" content="text/html; charset=utf-8">
    <title>江苏万和</title>
</head>
<body>
<%--第二个项目这里改为client2，以示区分--%>
client1 欢迎来到万和
<%=request.getRemoteUser()%>
<a href="/logout">退出</a>
</body>
</html>

2.2 以同样的方式创建cas-client2，注意其中与client1不同的地方，假设端口为9002

2.3 修改D:\Program Files\apache-tomcat-8.5.32\webapps\cas\WEB-INF\cas.properties，测试在退出之时可以跳转到其他页面

cas.logout.followServiceRedirects=true

2.4 测试

(1) 重启cas server，启动cas-client1，启动cas-client2
(2)访问http://localhost:9001，得到以下界面
跳转到了casserver默认登录页面
(3)输入zhangli/123456，点击“LOGIN”，跳转到以下界面
client1的欢迎界面
(4)在另一个标签中访问 http://localhost:9002，得到以下界面
不用登录直接进到欢迎界面
(5)在http://localhost:9002所在的界面上点击“退出”，则跳到了百度首页
(6)再次刷新http://localhost:9001，再次跳转到了登录界面
client2退出client1也就失效
以上就是casserver集合casclient1，casclient2完成的单点登录测试。

02 搭建cas client完成单点登录

1、前提约束

2、操作步骤

2.1 创建cas-client1，假设端口为9001

2.2 以同样的方式创建cas-client2，注意其中与client1不同的地方，假设端口为9002

2.3 修改D:\Program Files\apache-tomcat-8.5.32\webapps\cas\WEB-INF\cas.properties，测试在退出之时可以跳转到其他页面

2.4 测试

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