学习笔记:微服务-6.spring zuul + spring security + cas client 实现微服务sso登录

上节架构了spring zuul实现微服务的网页路由，因为zuul是微服务群的统一入口，非常适合在zuul服务上进行统一登录认证，本节实验结合spring zuul +spring security +Apereo cas实现微服务群的统一登录认证

spring security是一个spring的权限认证系统，cas是单位中央认证系统，从中央认证系统认证后，获取一个中央认证系统的身份（本测试中认证用户名linbin），spring security对这个用户名进行映射，比如这里映射为spring security的登录用户admin(可以通过数据库查询映射关系)，并设置admin用户的权限，从而实现统一登录认证到本spring boot微服务的本地系统用户和权限的转换，而因zuul的统一api入口地位，这个登录可以作为整个微服务群的统一登录

1. 新建spring boot 微服务项目 Eureka-Client-zuul

pom.xml  全文

<?xml version="1.0" encoding="UTF-8"?>
<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>
	<parent>
		<groupId>org.springframework.boot</groupId>
		<artifactId>spring-boot-starter-parent</artifactId>
		<version>2.1.1.RELEASE</version>
		<relativePath/> <!-- lookup parent from repository -->
	</parent>
	<groupId>com.linbin</groupId>
	<artifactId>Eureda-Client-zuul</artifactId>
	<version>0.0.1-SNAPSHOT</version>
	<name>Eureda-Client-zuul</name>
	<description>Demo project for Spring Boot</description>
	<properties>
		<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
		<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
		<java.version>1.8</java.version>
		<spring-cloud.version>Greenwich.M3</spring-cloud.version><!-- Finchley.M8 -->
	</properties>
	<dependencies>
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-web</artifactId>
		</dependency>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-netflix-zuul</artifactId>
        </dependency>
      <dependency> 
        <groupId>org.springframework.cloud</groupId>
        <artifactId>spring-cloud-starter-config</artifactId>
       </dependency>
      <dependency>
        <groupId>org.springframework.boot</groupId>
		  <artifactId>spring-boot-starter-security</artifactId> 
		 </dependency> 
   <dependency>
       <groupId>org.springframework.security</groupId>
       <artifactId>spring-security-cas</artifactId>
    </dependency>

		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-test</artifactId>
			<scope>test</scope>
		&l