cas错误:org.jasig.cas.client.validation.TicketValidationException: No principal wa

cas错误:org.jasig.cas.client.validation.TicketValidationException: No principal was found in the response from the CAS server.

很多文章都写到jasig CAS实现单点登录,客户端配置~如新建WEB项目cas-web-client, 并加入依赖包：cas-client-core-3.2.1.jar，commons-logging-1.1.jar，在配置web.xml时

 <filter>

       <filter-name>CASFilter</filter-name>

       <filter-class>org.jasig.cas.client.authentication.AuthenticationFilter</filter-class>

        <init-param>

            <param-name>casServerLoginUrl</param-name><!-- Cas Server登录url-->

            <param-value>https://www.tomcat1.com:8443/cas/login</param-value>

        </init-param>

        <init-param><!-- 配置当前web应用所在的web服务器域名url -->

            <param-name>serverName</param-name>

            <param-value>http://www.tomcat2.com:8080</param-value>

        </init-param>

    </filter>

    <filter-mapping>

        <filter-name>CASFilter</filter-name>

        <url-pattern>/*</url-pattern>

    </filter-mapping>

    <filter>

        <filter-name>CasTicketFilter</filter-name>

        <filter-class>

            org.jasig.cas.client.validation.Cas20ProxyReceivingTicketValidationFilter</filter-class>

        <init-param>

            <param-name>casServerUrlPrefix</param-name>

            <param-value>https://www.tomcat1.com:8443/cas</param-value><===此处必须拿掉“/cas”

        </init-param>

        <init-param>

            <param-name>serverName</param-name>

            <param-value>http://www.tomcat2.com:8080</param-value>

        </init-param>

    </filter>

 

 

哎，为何好多人都没遇到呢？？？最后还是

http://jasig.275507.n4.nabble.com/No-principal-was-found-in-the-response-from-the-CAS-server-td1011262.html把问题找出来....