CAS Server 中获取登录账号名称

1、开发以及使用cas单点登录已经一年多了，途中为满足功能需求在断断续续在修改cas源码，在此我建议，如果想自定义登入成功界面、密码修改、用户注册等功能，请单独开发一个web小工程，因为cas服务端(cas-server)的代码沉重，整个逻辑理解起来挺困难，还是制作一个小项目cas客户端(cas-client)方便，cas服务器（cas-server）只单纯做登录验证过程。（个人建议）

2、如果想在CAS  Server 中获取登录账号名称

2.1、添加两个类

package com.esb.mydefined.util;

import javax.servlet.http.HttpServletRequest;

import org.jasig.cas.ticket.TicketGrantingTicket;
import org.jasig.cas.ticket.registry.TicketRegistry;
import org.jasig.cas.web.support.CookieRetrievingCookieGenerator;

public class GetLoginUserName {
	/**
	 * 获取登入账号
	 * @param request
	 * @return
	 */
	public static String getLoginUserName(HttpServletRequest request) {
		CookieRetrievingCookieGenerator ticketGrantingTicketCookieGenerator = (CookieRetrievingCookieGenerator) SpringContextUtil.getBean("ticketGrantingTicketCookieGenerator");
		TicketRegistry ticketRegistry = (TicketRegistry) SpringContextUtil.getBean("ticketRegistry");
		String userName = null;
		String serviceTicketId = ticketGrantingTicketCookieGenerator.retrieveCookieValue(request);
		TicketGrantingTicket serviceTicket = (TicketGrantingTicket) ticketRegistry.getTicket(serviceTicketId);
		if (serviceTicket != null && serviceTicket.isExpired() == false) {
			userName = serviceTicket.getAuthentication().getPrincipal().getId();
		}
		return userName;
	}
}

package com.esb.mydefined.util;

import org.springframework.beans.BeansException;
import org.springframework.context.ApplicationContext;
import org.springframework.context.ApplicationContextAware;

/**
 * 获取注入的bean
 * @author junfei_lu
 *
 */
public class SpringContextUtil implements ApplicationContextAware{
	private static ApplicationContext applicationContext; // Spring应用上下文环境

    /*
     * 实现了ApplicationContextAware 接口，必须实现该方法；
     * 通过传递applicationContext参数初始化成员变量applicationContext
     */
    public void setApplicationContext(ApplicationContext applicationContext) throws BeansException {
        SpringContextUtil.applicationContext = applicationContext;
    }

    public static ApplicationContext getApplicationContext() {
        return applicationContext;
    }

    @SuppressWarnings("unchecked")
    public static  T getBean(String name) throws BeansException {
        return (T) applicationContext.getBean(name);
    }

    public static  T getBean(Class clazz) throws BeansException {
        return (T) applicationContext.getBean(clazz);
    }
}

2.2、获取注入bean这个类添加在cas-servlet.xml中

2.3、在登入界面（casGenericSuccess.jsp）引入获取登录账号的方法并调用，这样就可以在页面上获取账号名了。

<%@page import="com.esb.mydefined.util.GetLoginUserName" %>
<%
	String username = GetLoginUserName.getLoginUserName(request);
	if(username == null){
		username= request.getParameter("username");
	}
%>





    
<%=username%>