Listener refused the connection with the following error:ORA-12514, TNS:listener does not currently
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当我们更换ip地址时，会遇到这样的报错，这是由于ip地址改变引起的“ORA-12541:TNS:无监听程序”错误。
我们在WINDOWS.X64_193000_db_home\\network\\admin\\tnsnames.ora中修改其中你改变了的IP地址
完了之后重启Oracle监听服务。
或者你把你的IP地址改成文件中的固定IP地址，这样也可以连接上数据库。
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