Oracle使用cmd命令导出库,ORA-12545: 因目标主机或对象不存在，连接失败

报错如图：

解决方法：
查看Oracle安装所在目录下\product\11.2.0\dbhome_1\NETWORK\ADMIN的tnsnames.ora,文件中HOST修改为数据库的ip地址

ORCL =(DESCRIPTION =(ADDRESS_LIST =(ADDRESS = (PROTOCOL = TCP)(HOST = XXX.XXX.XXX.XX)(PORT = 1521)))(CONNECT_DATA =(SERVER = DEDICATED)(SERVICE_NAME = orcl)))