1. springboot项目pom.xml中 添加cas客户端依赖包
<dependency>
<groupId>org.jasig.cas.client</groupId>
<artifactId>cas-client-core</artifactId>
<version>3.5.0</version>
</dependency>
2.配置地址信息，在application.properties文件中配置如下
#CAS服务地址
cas.server-url=http://localhost:8080/cas
#本地客户端ip端口，不是首页地址
cas.client-host=http://localhost:8081
3.cas过滤器配置
import org.jasig.cas.client.authentication.AuthenticationFilter;
import org.jasig.cas.client.session.SingleSignOutFilter;
import org.jasig.cas.client.session.SingleSignOutHttpSessionListener;
import org.jasig.cas.client.util.HttpServletRequestWrapperFilter;
import org.jasig.cas.client.validation.Cas20ProxyReceivingTicketValidationFilter;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.boot.web.servlet.FilterRegistrationBean;
import org.springframework.boot.web.servlet.ServletListenerRegistrationBean;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.PropertySource;
import org.springframework.core.Ordered;
@Configuration
@PropertySource("classpath:application.properties")
public class casFilterConfig {
@Value("${cas.server-url}")
private String CAS_URL;
@Value("${cas.client-host}")
private String APP_URL;
@Bean
public ServletListenerRegistrationBean servletListenerRegistrationBean(){
ServletListenerRegistrationBean listenerRegistrationBean = new ServletListenerRegistrationBean();
listenerRegistrationBean.setListener(new SingleSignOutHttpSessionListener());
listenerRegistrationBean.setOrder(Ordered.HIGHEST_PRECEDENCE);
return listenerRegistrationBean;
}
/**
* 单点登录退出
* @return
*/
@Bean
public FilterRegistrationBean singleSignOutFilter(){
FilterRegistrationBean registrationBean = new FilterRegistrationBean();
registrationBean.setFilter(new SingleSignOutFilter());
registrationBean.addUrlPatterns("/*");
registrationBean.addInitParameter("casServerUrlPrefix", CAS_URL );
registrationBean.setName("CAS Single Sign Out Filter");
registrationBean.setOrder(2);
return registrationBean;
}
/**
* 单点登录认证
* @return
*/
@Bean
public FilterRegistrationBean AuthenticationFilter(){
FilterRegistrationBean registrationBean = new FilterRegistrationBean();
registrationBean.setFilter(new AuthenticationFilter());
registrationBean.addUrlPatterns("/*");
registrationBean.setName("CAS Filter");
registrationBean.addInitParameter("casServerLoginUrl",CAS_URL);
registrationBean.addInitParameter("serverName", APP_URL );
registrationBean.setOrder(3);
return registrationBean;
}
/**
* 单点登录校验
* @return
*/
@Bean
public FilterRegistrationBean cas20ProxyReceivingTicketValidationFilter(){
FilterRegistrationBean registrationBean = new FilterRegistrationBean();
registrationBean.setFilter(new Cas20ProxyReceivingTicketValidationFilter());
registrationBean.addUrlPatterns("/*");
registrationBean.setName("CAS Validation Filter");
registrationBean.addInitParameter("casServerUrlPrefix", CAS_URL );
registrationBean.addInitParameter("serverName", APP_URL );
registrationBean.setOrder(4);
return registrationBean;
}
/**
* 单点登录请求包装
* @return
*/
@Bean
public FilterRegistrationBean httpServletRequestWrapperFilter(){
FilterRegistrationBean registrationBean = new FilterRegistrationBean();
registrationBean.setFilter(new HttpServletRequestWrapperFilter());
registrationBean.addUrlPatterns("/*");
registrationBean.setName("CAS HttpServletRequest Wrapper Filter");
registrationBean.setOrder(5);
return registrationBean;
}
/**
* 单点登录本地用户信息
* @return
*/
@Bean
public FilterRegistrationBean localUserInfoFilter(){
FilterRegistrationBean registrationBean = new FilterRegistrationBean();
registrationBean.setFilter(new LocalUserInfoFilter());
registrationBean.addUrlPatterns("/*");
registrationBean.setName("localUserInfoFilter");
registrationBean.setOrder(6);
return registrationBean;
}
}
4.获取登录用户账号名称工具类
import org.jasig.cas.client.authentication.AttributePrincipal;
import org.jasig.cas.client.util.AbstractCasFilter;
import org.jasig.cas.client.validation.Assertion;
import javax.servlet.http.HttpServletRequest;
public class CASUtil { /**
* 从cas中获取用户名
*
* @param request
* @return
*/
public static String getAccountNameFromCas(HttpServletRequest request) {
Assertion assertion = (Assertion) request.getSession().getAttribute(AbstractCasFilter.CONST_CAS_ASSERTION);
if(assertion!= null){
AttributePrincipal principal = assertion.getPrincipal();
return principal.getName();
}else return null;
}
}
5.定义本地过滤器，作用是通过从单点登录服务器获取用户账号，将登录的用户账号存到session中。(CAS服务端在认证通过后,会把当前认证通过的登陆用户名传递到子系统,当然,认证通过的用户名有可能与子系统的用户名不一样,那子系统就需要一个认证通过的用户名与子系统用户的映射,在子系统拿到通过认证的用户名,再找到对应的子系统用户)
import mons.lang.StringUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import javax.servlet.*;
import javax.servlet.http.HttpServletRequest;
import java.io.IOException;
public class LocalUserInfoFilter implements Filter {
Logger logger = LoggerFactory.getLogger(LocalUserInfoFilter.class);
@Override
public void init(FilterConfig filterConfig) throws ServletException {
}
@Override
public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException {
HttpServletRequest request_ = (HttpServletRequest)request;
String loginName = CASUtil.getAccountNameFromCas(request_);
if(StringUtils.isNotEmpty(loginName)){
logger.info("访问者 ：" +loginName);
request_.getSession().setAttribute("loginName", loginName);
}
chain.doFilter(request, response);
}
@Override
public void destroy() {
}
}
6.controller
@Controller
public class DemoController {
//进入系统首页方法，如果没有登录，会跳转到CAS统一登录页面，登录成功后会回调该方法。
@RequestMapping("/")
public String index(){
return "index";
}
//登出
@RequestMapping("/logout")
public String logout(HttpSession session){
session.invalidate();
return "redirect:http://localhost:8080/cas/logout?service=http://localhost:8080/cas";
}
}
