Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'userDetailService' defined in class path resource [spring/spring-security.xml]: Cannot resolve reference to bean 'sellerService' while setting bean property 'sellerService'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'sellerService': FactoryBean threw exception on object creation; nested exception is org.I0Itec.zkclient.exception.ZkTimeoutException: Unable to connect to zookeeper server within timeout: 5000
或者
Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'org.springframework.security.authentication.dao.DaoAuthenticationProvider#0': Cannot resolve reference to bean 'userDetailService' while setting bean property 'userDetailsService'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'userDetailService' defined in class path resource [spring/spring-security.xml]: Cannot resolve reference to bean 'sellerService' while setting bean property 'sellerService'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'sellerService': FactoryBean threw exception on object creation; nested exception is org.I0Itec.zkclient.exception.ZkTimeoutException: Unable to connect to zookeeper server within timeout: 5000
以上報錯都是是連接zookeeper超時，解決步驟：
①：查看當前maven項目的配置文件的IP地址，與虛擬機中linux系統的IP地址是否相同，不相同則改爲相同
②：查看linux的zookeeper是否啓動，沒有啓動則將它啓動，啓動命令是
./zkServer.sh start（先進入zookeeper的安裝目錄下的bin目錄）
③：主機必須可以連接上linux虛擬機，打開黑窗口，輸入ping+空格+虛擬機IP地址
如果可以連接，則OK
確認修改後install項目，然後重寫用tomcat運行一遍即可