如何解决ORA-12154 “TNS：无法解析指定的连接标识符”这个问题？ 我的oracle出现ORA-12154: TNS: 无法解析...

\u5982\u4f55\u89e3\u51b3ORA-12154\uff1aTNS\uff1a\u65e0\u6cd5\u89e3\u6790\u6307\u5b9a\u7684\u8fde\u63a5\u6807\u8bc6\u7b26

\u3000\u3000\u5728\u7a0b\u5e8f\u4e2d\u8fde\u63a5Oracle\u6570\u636e\u5e93\u7684\u65b9\u5f0f\u4e0e\u5176\u4ed6\u5e38\u7528\u6570\u636e\u5e93\uff0c\u5982\uff1aMySql,Sql Server\u4e0d\u540c\uff0c\u8fd9\u4e9b\u6570\u636e\u5e93\u53ef\u4ee5\u901a\u8fc7\u76f4\u63a5\u6307\u5b9aIP\u7684\u65b9\u5f0f\u8fde\u63a5\uff0c\u4f46\u662fOracle\u5219\u9700\u8981\u901a\u8fc7Oracle\u5ba2\u6237\u7aef\u914d\u7f6e\u7f51\u7edc\u670d\u52a1\u540d\u7684\u65b9\u5f0f\u6765\u8fde\u63a5\u3002\u5426\u5219\u5c31\u4f1a\u51fa\u73b0\u201cORA-12154: TNS: \u65e0\u6cd5\u89e3\u6790\u6307\u5b9a\u7684\u8fde\u63a5\u6807\u8bc6\u7b26\u201d\u3002\u914d\u7f6eOracle\u5ba2\u6237\u7aef\u8be6\u7ec6\u6b65\u9aa4\u5982\u4e0b\uff1a
\u3000\u3000\u5b89\u88c5\u597dOracle\u5ba2\u6237\u7aef\u4e4b\u540e\uff0c\u5728\u5f00\u59cb\u83dc\u5355\u4e2d\u4f9d\u6b21\u627e\u5230\u201cOracle - OraClient10g_home1\u2014>\u914d\u7f6e\u548c\u79fb\u690d\u5de5\u5177\u2014>Net Manager\u201d\u5e76\u6253\u5f00\uff08Win7,Win8\u7528\u6237\u5982\u679c\u6ca1\u6709\u53d6\u5f97Administrator\u8d26\u53f7\u767b\u9646\u9700\u8981\u4ee5\u7ba1\u7406\u5458\u65b9\u5f0f\u8fd0\u884c\uff09\uff0c\u4f9d\u6b21\u5c55\u5f00\u201cOracle Net\u914d\u7f6e\u2014>\u672c\u5730\u2014>\u670d\u52a1\u547d\u540d\u201d\u70b9\u51fb\u5de6\u4fa7\u201c\u52a0\u53f7\u201d\u914d\u7f6e\u65b0\u7684\u7f51\u7edc\u670d\u52a1
\u3000\u3000

\u3000\u3000\u6700\u540e\uff0c\u70b9\u51fb\u201c\u4e0b\u4e00\u6b65\u201d\u5b8c\u6210\u5373\u53ef\uff0c\u5982\u679c\u4e0d\u77e5\u9053\u6216\u8005\u5fd8\u8bb0Oracle\u670d\u52a1\u540d\u53ef\u4ee5\u901a\u8fc7\u67e5\u770b\u670d\u52a1\u83b7\u5f97\uff0c\u6bd4\u5982\u6211\u8fd9\u91cc\u914d\u7f6e\u7684\u4e3b\u673a\u540d\u662f\u6211\u672c\u673a\uff0c\u5728\u6211\u7684\u7535\u8111\u670d\u52a1\u4e2d\u627e\u5230oracle\u76f8\u5173\u7684\u670d\u52a1
\u3000\u3000

\u3000\u3000\u901a\u8fc7\u4e0a\u9762\u7684\u670d\u52a1\u540d\u79f0\uff0c\u53ef\u4ee5\u770b\u51fa\u6211\u5b89\u88c5\u7684\u670d\u52a1\u540d\u5c31\u662f\u201cORCL\u201d\uff0c\u6216\u8005\u5728\u670d\u52a1\u7aef\u901a\u8fc7SQL Plus\u4f7f\u7528sys\u8d26\u53f7\u767b\u9646\uff0c\u8f93\u5165\u547d\u4ee4
\u3000\u3000show parameter service_name\u67e5\u770b\u3002
\u3000\u3000OracleDBConsoleORCL\u662fOracle\u7f51\u9875\u7aef\u7ba1\u7406\u5de5\u5177\u7684\u670d\u52a1\uff0c\u8bbf\u95ee\u5730\u5740\u4e00\u822c\u4e3a\u201chttp://127.0.0.1:1158/em/console/logon/logon\u201d\uff0c\u5982\u679c\u4e0d\u4e60\u60ef\u7528\u8fd9\u4e2a\u6765\u7ba1\u7406\u6570\u636e\u5e93\u53ef\u4ee5\u4e0d\u7528\u542f\u52a8\u3002
\u3000\u3000OracleJobSchedulerORCL\u662f\u7ba1\u7406Oracle\u4e2d\u8ba1\u5212\u4efb\u52a1\u7684\uff0c\u4e00\u822c\u4e0d\u7528\u542f\u52a8\u3002
\u3000\u3000OracleOraDb10g_home1iSQL*Plus\u662fSQL Plus\u7684\u670d\u52a1\uff0c\u5982\u679c\u4e0d\u4e60\u60ef\u5728\u547d\u4ee4\u884c\u4e0b\u9762\u64cd\u4f5c\u6570\u636e\u5e93\uff0c\u53ef\u4ee5\u4e0d\u7528\u542f\u52a8\u3002
\u3000\u3000OracleServiceORCL\uff0cOracleOraDb10g_home1TNSListener\u90fd\u9700\u8981\u5f00\u542f\uff0c\u524d\u8005\u662f\u4e3b\u670d\u52a1\uff0c\u540e\u8005\u662f\u76d1\u542c\u670d\u52a1\u3002
\u3000\u3000
\u3000\u3000\u5f53\u5728Oracle\u5ba2\u6237\u7aef\u4e2d\u914d\u7f6e\u597dNet Manager\u4e2d\u914d\u7f6e\u597d\u670d\u52a1\u540e\u5c31\u53ef\u4ee5\u901a\u8fc7\u6211\u4eec\u914d\u7f6e\u7684\u7f51\u7edc\u670d\u52a1\u540d\u8bbf\u95eeOracle\u6570\u636e\u5e93\u4e86\uff0c\u6b64\u914d\u7f6e\u5b9e\u8d28\u60f3D:\Oracle\product\10.2.0\client_1\NETWORK\ADMIN\tnsnames.ora\u4e2d\u589e\u52a0\u4e86\u4e00\u884c\u914d\u7f6e(\u7531\u4e8e\u6211\u7684Oracle\u662f\u5b89\u88c5\u5728D\u76d8Oracle\u76ee\u5f55\u4e2d\uff0c\u5177\u4f53\u8def\u5f84\u6839\u636e\u5b89\u88c5\u65f6\u9009\u62e9\u7684\u8def\u5f84\u800c\u5b9a)\u3002
\u3000\u3000

\u3000\u3000# tnsnames.ora Network Configuration File: d:\Oracle\product\10.2.0\client_1\NETWORK\ADMIN\tnsnames.ora
\u3000\u3000# Generated by Oracle configuration tools.

\u3000\u3000ORCL =
\u3000\u3000(DESCRIPTION =
\u3000\u3000(ADDRESS_LIST =
\u3000\u3000(ADDRESS = (PROTOCOL = TCP)(HOST = 127.0.0.1)(PORT = 1521))
\u3000\u3000)
\u3000\u3000(CONNECT_DATA =
\u3000\u3000(SERVICE_NAME = ORCL)
\u3000\u3000)
\u3000\u3000)

\u3000\u3000\u5982\u679c\u5728\u540c\u4e00\u53f0\u7535\u8111\u4e0a\u9762\u540c\u65f6\u5b89\u88c5\u4e86Oracle\u5ba2\u6237\u7aef\u548c\u670d\u52a1\u7aef\uff0c\u90a3\u4e48\u5728\u670d\u52a1\u7aef\u7684\u5b89\u88c5\u76ee\u5f55\u4e2d\u4e5f\u4f1a\u5b58\u5728\u540c\u6837\u7684\u914d\u7f6e\u6587\u4ef6D:\Oracle\product\10.2.0\db_1\NETWORK\ADMIN\tnsnames.ora\uff0c\u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b\u5982\u679c\u6211\u4eec\u914d\u7f6e\u597d\u4e86\u5ba2\u6237\u7aefNet Manager\u7136\u540e\u8fde\u63a5Oracle\u6570\u636e\u5e93\uff0c\u53ef\u80fd\u4f1a\u51fa\u73b0\u201cORA-12154: TNS: \u65e0\u6cd5\u89e3\u6790\u6307\u5b9a\u7684\u8fde\u63a5\u6807\u8bc6\u7b26\u201d\u8fd9\u65f6\uff0c\u4f60\u5c31\u5e94\u8be5\u6000\u7591\uff0c\u6211\u5230\u5e95\u8bbf\u95ee\u7684\u662f\u54ea\u4e2a\u8def\u5f84\u4e0b\u7684\u914d\u7f6e\u6587\u4ef6\u5462\uff1f\u6b64\u65f6\u53ef\u4ee5\u4f7f\u7528tnsping\u547d\u4ee4
\u3000\u3000

\u3000\u3000\u5982\u679c\u4f60\u662f\u5728\u5ba2\u6237\u7aefNet Manager\u4e2d\u914d\u7f6e\u7684\u7f51\u7edc\u670d\u52a1\uff0c\u4f46\u662f\u6b64\u65f6\u89e3\u6790\u51fa\u6765\u7684\u4f7f\u7528\u53c2\u6570\u6587\u4ef6\u5374\u662fD:\Oracle\product\10.2.0\db_1\NETWORK\ADMIN\sqlnet.ora\uff0c\u90a3\u4e48\u6211\u60f3\u4f60\u5e94\u8be5\u660e\u767d\u4e86\u3002\u8fd9\u79cd\u60c5\u51b5\u6709\u4e24\u79cd\u89e3\u51b3\u529e\u6cd5\uff1a
\u3000\u3000\u7b2c\u4e00\uff1a\u5728\u670d\u52a1\u7aef\u7684Net Manager\u4e5f\u914d\u7f6e\u76f8\u540c\u7684\u7f51\u7edc\u670d\u52a1\uff0c\u6216\u8005\u76f4\u63a5\u62f7\u8d1dD:\Oracle\product\10.2.0\client_1\NETWORK\ADMIN\tnsnames.ora\u4e2d\u7684\u914d\u7f6e\u5230D:\Oracle\product\10.2.0\db_1\NETWORK\ADMIN\tnsnames.ora\uff0c\u6bcf\u6b21\u914d\u7f6e\u4e86\u65b0\u7684\u7f51\u7edc\u670d\u52a1\u4f60\u90fd\u9700\u8981\u8fd9\u4e48\u505a\uff0c\u5982\u679c\u4e0d\u60f3\u8fd9\u4e48\u9ebb\u70e6\u90a3\u5c31\u4f7f\u7528\u7b2c\u4e8c\u79cd\u89e3\u51b3\u529e\u6cd5\u3002
\u3000\u3000\u7b2c\u4e8c\uff1a\u4fee\u6539\u7cfb\u7edf\u73af\u5883\u53d8\u91cfPath\u503c\uff0c\u5c06D:\Oracle\product\10.2.0\client_1\bin;\u8def\u5f84\u79fb\u81f3D:\Oracle\product\10.2.0\db_1\bin;\u524d\u9762\u5373\u53ef\u4e00\u52b3\u6c38\u9038\u3002
\u3000\u3000\u6ce8\u610f\uff1a\u9020\u6210\u4ee5\u4e0a\u8fd9\u79cd\u60c5\u51b5\u51fa\u73b0\u7684\u539f\u56e0\u662f\uff1a\u5728\u4e00\u53f0\u7535\u8111\u4e0a\u540c\u65f6\u5b89\u88c5\u4e86oracle\u5ba2\u6237\u7aef\u548c\u6570\u636e\u5e93\u670d\u52a1\uff0c\u5e76\u4e14\u662f\u5148\u5b89\u88c5\u5ba2\u6237\u7aef\uff0c\u518d\u5b89\u88c5\u6570\u636e\u5e93\u670d\u52a1\u9020\u6210\u7684\uff0c\u5982\u679c\u5148\u5b89\u88c5\u6570\u636e\u5e93\u670d\u52a1\uff0c\u518d\u5b89\u88c5\u5ba2\u6237\u7aef\u5c31\u4e0d\u4f1a\u51fa\u73b0\u8fd9\u79cd\u60c5\u51b5\u4e86\u3002
\u3000\u3000\u6839\u636e\u4ee5\u4e0a\u65b9\u5f0f\u914d\u7f6e\u5b8coracle\u540e\uff0c\u76f8\u4fe1\u5728\u7a0b\u5e8f\u4e2d\u5c31\u53ef\u4ee5\u6b63\u5e38\u8fde\u63a5oracle\u6570\u636e\u5e93\u4e86\u3002
\u3000\u3000
\u3000\u3000\u5f53\u6211\u5b89\u88c5\u597dPLSQL Developer\u8f6f\u4ef6\u540e\u767b\u9646\u65f6\u4efb\u7136\u51fa\u73b0\u4e86\u201cORA-12154: TNS: \u65e0\u6cd5\u89e3\u6790\u6307\u5b9a\u7684\u8fde\u63a5\u6807\u8bc6\u7b26\u201d\uff0c\u5982\u679c\u662fWin7,Win8\u7528\u6237\u751a\u81f3\u53ef\u4ee5\u4f1a\u51fa\u73b0\u5f39\u51fa\u4e00\u4e2a\u767d\u6846\u7684\u60c5\u51b5\uff0c\u8fd9\u65f6\u9700\u8981\u4ee5\u7ba1\u7406\u5458\u8eab\u4efd\u8fd0\u884cPLSQL Developer\uff0c\u5e76\u4e14\u786e\u4fdd\u4f60\u7684PLSQL Developer\u662f\u8bfb\u53d6\u7684oracle\u5ba2\u6237\u7aef\u914d\u7f6e\uff0c\u76f4\u63a5\u53d6\u6d88\u767b\u9646\uff0c\u5728PLSQL Developer\u5de5\u5177\u680f\u4e2d\u627e\u5230\u201cTools\u2014>Preferences\u201d\uff0c\u5728Oracle\u7684Connection\u8282\u70b9\u4e2d\u627e\u5230Oracle Home\u9009\u62e9OraClient10g_home1\uff0c\u4fdd\u5b58\u540e\u5173\u95edPLSQL Developer\u5c31\u53ef\u4ee5\u6b63\u5e38\u767b\u9646\u4e86\u3002
\u3000\u3000

\u3000\u3000\u9700\u8981\u6ce8\u610f\u7684\u662f\uff0c\u5728\u5b89\u88c5PLSQL Developer\u65f6\u4e0d\u80fd\u5b89\u88c5\u5728\u5e26\u6709\u62ec\u53f7\u7684\u76ee\u5f55\u4e2d\uff0c\u598264bit\u7cfb\u7edf\u7684Program Files (x86)\u76ee\u5f55\uff0c\u5c31\u4f1a\u51fa\u73b0\u65e0\u8bba\u4f60\u600e\u4e48\u8bbe\u7f6e\uff0c\u5b83\u4f9d\u7136\u4e0d\u505c\u7684\u5f39\u51fa\u201cORA-12154: TNS: \u65e0\u6cd5\u89e3\u6790\u6307\u5b9a\u7684\u8fde\u63a5\u6807\u8bc6\u7b26\u201d\u3002\u540c\u6837\u7684\u95ee\u9898\u4e5f\u4f1a\u51fa\u73b0\u5728\u5176\u4ed6Oracle\u6570\u636e\u5e93\u7ba1\u7406\u8f6f\u4ef6\u4e2d\uff0c\u6bd4\u5982Toad for Oracle
\u3000\u3000
\u3000\u3000\u201cORA-12154: TNS: \u65e0\u6cd5\u89e3\u6790\u6307\u5b9a\u7684\u8fde\u63a5\u6807\u8bc6\u7b26\u201d\u662f\u4f7f\u7528Oracle\u6570\u636e\u5e93\u7684\u65b0\u624b\u9047\u5230\u7684\u6bd4\u8f83\u5e38\u89c1\u7684\u95ee\u9898\u4e4b\u4e00\uff0c\u53ea\u8981\u6211\u4eec\u4e86\u89e3\u4e86\u5b83\u7684\u5de5\u4f5c\u65b9\u5f0f\uff0c\u51b7\u9759\u6392\u67e5\uff0c\u76f8\u4fe1\u5f88\u5bb9\u6613\u5c31\u80fd\u591f\u627e\u5230\u95ee\u9898\u7684\u89e3\u51b3\u529e\u6cd5\u7684\u3002

\u4f5c\u4e3aORACLE\u6570\u636e\u5e93\u7684\u5f00\u53d1\u4eba\u5458\uff0c\u5f88\u591a\u90fd\u78b0\u5230\u8fc7\u201cORA-12154: TNS: \u65e0\u6cd5\u89e3\u6790\u6307\u5b9a\u7684\u8fde\u63a5\u6807\u8bc6\u7b26\u201d\u7684\u95ee\u9898\u3002
\u95ee\u9898\u573a\u666f\u63cf\u8ff0\uff1a
\u670d\u52a1\u5668\u7aef\u7248\u672c\uff1aoracle 10.2.0.10
\u5ba2\u6237\u7aef\u7248\u672c\uff1aoracle 10.2.0.10
\u5ba2\u6237\u7aef\u5f00\u53d1\u5de5\u5177\uff1aPL/SQL Developer
\u901a\u8fc7\u5ba2\u6237\u7aef\u6765\u8fde\u63a5\u670d\u52a1\u5668\uff0c\u5176\u4e3b\u8981\u6587\u4ef6\u5c31\u662f\u901a\u8fc7\u5ba2\u6237\u7aef\u7684tnsnames.ora\u6765\u914d\u7f6e\uff0c\u5728\u539f\u6587\u4ef6\u7684\u57fa\u7840\u4e0a\u589e\u52a0\uff1a
SID\u522b\u540d =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = SERVER_IP)(PORT = 1521))
)
(CONNECT_DATA =
(SID = SID_NAME)
)
)
\u4f8b\uff1a
dev_db =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = 172.168.10.5)(PORT = 1521))
)
(CONNECT_DATA =
(SID = ora10)
)
)
\u901a\u8fc7PL/SQL Developer\u8fde\u63a5dev_db\u65f6\uff0c\u62a5\u201cORA-12154: TNS: \u65e0\u6cd5\u89e3\u6790\u6307\u5b9a\u7684\u8fde\u63a5\u6807\u8bc6\u7b26\u201d\u3002\uff08\u8fd9\u4e2a\u95ee\u9898\u4ee5\u524d\u4e5f\u78b0\u5230\u8fc7\uff0c\u4f46\u89e3\u51b3\u65b9\u6cd5\u4e0d\u592a\u4e00\u6837\uff0c\u56e0\u5177\u4f53\u7684\u95ee\u9898\u4e0d\u592a\u4e00\u6837\u3002\uff09

\u6211\u5c06\u81ea\u5df1\u77e5\u9053\u7684\u4e00\u4e9b\u89e3\u51b3\u65b9\u6cd5\u8bf4\u4e00\u4e0b\uff1a
1.\u5148\u68c0\u67e5\u670d\u52a1\u5668\u7aef\u7684\u76d1\u542c\u670d\u52a1\u662f\u5426\u6253\u5f00\uff0c\u5982\u679c\u6ca1\u6709\u6253\u5f00\u8bf7\u542f\u52a8\u5176\u76d1\u542c
\u3000\u5ba2\u6237\u7aef:tnsping
\u670d\u52a1\u5668Linux\u4e0b:
\u3000\u3000\u3000\u3000\u3000#>lsnrctl status \u67e5\u770b\u76d1\u542c\u72b6\u6001
\u3000\u3000\u3000\u3000\u3000#>lsnrctl start\u3000\u542f\u52a8\u76d1\u542c
2.\u901a\u8fc7Sql Plus\u8fde\u63a5\u4e00\u4e0b\u8bd5\u8bd5\uff0c\u5982\u679cSql Plus\u8fde\u63a5\u80fd\u6210\u529f\uff0c\u90a3\u5c31\u8bf4\u660e\u4f60\u7684tnsnames.ora\u5185\u5bb9\u6709\u9519\u8bef
\u6211\u7684\u95ee\u9898\u5c31\u5728\u522b\u540ddev_db\u524d\u9762\u6709\u4e00\u4e2a\u7a7a\u683c\uff0c\u8fd9\u4e2a\u53ef\u4ee5\u901a\u8fc7\u6587\u672c\u7f16\u8f91\u5668(Edit Plus,UE\u7b49)\u6765\u67e5\u770b\u662f\u5426\u6709\u7a7a\u683c\uff0c\u53ea\u8981\u6709\u7a7a\u683c\u90a3\u5c31\u80af\u5b9a\u662f\u4e0d\u884c\u7684\uff0c\u800c\u4e14\u5982\u679c\u90a3\u6bb5\u5185\u5bb9\u662f\u51fa\u73b0\u5728\u6587\u4ef6\u7684\u4e2d\u95f4\u7684\u8bdd\uff0c\u5c06\u5bfc\u81f4\u8be5\u6587\u4ef6\u91cc\u6240\u6709\u76f8\u5e94\u7684\u8fde\u63a5\u522b\u540d\u90fd\u4e0d\u6210\u529f\uff0c\u5982\u679c\u662f\u5728\u6700\u540e\u9762\u5c31\u53ea\u6709\u5176\u81ea\u8eab\u8fde\u63a5\u522b\u540d\u4e0d\u80fd\u6210\u529f\uff0c\u5176\u4ed6\u8fde\u63a5\u522b\u540d\u8fd8\u662f\u80fd\u8fde\u63a5\u6210\u529f\u3002\uff08\u6ce8\uff1a\u6211\u7684tnsnames.ora\u914d\u7f6e\u4e86\u591a\u4e2a\u6570\u636e\u5e93\u5b9e\u4f8b\u7684\u8fde\u63a5\uff0c\u6240\u6709\u624d\u6709\u591a\u4e2a\u8fde\u63a5\u522b\u540d\u3002\uff09
\u5982\uff1a
\u7a7a\u683cdev_db =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = 172.168.10.5)(PORT = 1521))
)
(CONNECT_DATA =
(SID = ora10)
)
)
3.\u5982\u679c\u786e\u4fdd\u4f60\u7684tnsnames.ora\u5185\u5bb9\u6ca1\u6709\u9519\u8bef\uff0c\u90a3\u8bf7\u5c06%ORACLE_HOME%\product\10.2.0\db_1\NETWORK\ADMIN\u76ee\u5f55\u4e0b\u7684\u6240\u6709\u6587\u4ef6\u5220\u4e86\uff0c\u7136\u540e\u91cd\u65b0\u8fde\u63a5\uff0c\u4e00\u822c\u5c31\u80fd\u89e3\u51b3\u4e86\u3002
\u8bf4\u660e\u4e00\u4e0b\uff1a\u90a3\u4e2a\u76ee\u5f55\u91cc\u7684\u6587\u4ef6\u662f\u5728\u4f60\u5efa\u7acb\u8fde\u63a5\u7684\u65f6\u5019\u52a8\u6001\u751f\u6210\u7684\uff0c\u4e0d\u8981\u6015\u5220\u4e86\u4f1a\u6709\u95ee\u9898
4.\u8fdb\u5165PLSQL Developer\u7684\u4e3b\u754c\u9762,\u5728\u767b\u5f55\u754c\u9762\u9009\u62e9\u53d6\u6d88\u5373\u4e0d\u767b\u5f55\u8fdb\u5165\u4e3b\u754c\u9762\uff0c\u7136\u540e\u9009\u62e9\u83dc\u5355Tools(\u5de5\u5177)-Preferences(\u9996\u9009\u9879)\uff0c\u5728\u8bbe\u7f6e\u7a97\u53e3\u4e2d\uff0c\u9009\u62e9Oracle-Connection(\u8fde\u63a5)\uff0c\u5bf9\u5e94\u8bbe\u7f6e\u7a97\u53e3\u4e2d\uff0c\u627e\u5230Oracle Home(Oracle\u4e3b\u76ee\u5f55)\uff0c\u9009\u62e9\u4f60\u672c\u5730\u6240\u5b89\u88c5\u5ba2\u6237\u7aef\u7684\u7248\u672c\uff0c\u4fdd\u5b58\u8bbe\u7f6e\uff0c\u7136\u540e\u91cd\u65b0\u542f\u52a8PLSQL Developer\uff0c\u8fd9\u65f6\u5c31\u53ef\u4ee5\u6b63\u5e38\u767b\u5f55\u4e86\u3002

1、检查服务

出现这种问题，首先我们想到的是检查服务有没有问题OracleOraDb11g_home2TNSListener。在运行中输入services.msc，打开服务窗口，看看OracleOraDb11g_homeTNSListener这个服务是否正在运行，如果没有运行，则启动。

2、使用SQL PLUS测试连接。

如果还有问题，我们使用SQL PLUS测试是否能够连接。运行输入cmd,在命令提示符窗口中输入sqlplus sys/密码@数据库SID as sysdba如：

3、检查tnsnames.ora配置

在客户端的安装路径下，我的是D:\oracle\instantclient_12_1\NETWORK\ADMIN，创建一个文件，名为：tnsnames.ora，如果之前创建过了，则直接打开住里追加就行了。在tnsnames.ora中追加如下内容：

SID名 =(DESCRIPTION =(ADDRESS = (PROTOCOL = TCP)(HOST = localhost)(PORT = 1522))(CONNECT_DATA =(SERVER = DEDICATED)(SERVICE_NAME = SID名))

注意SID名前面不能有任何其他字符，尤其是空格！

保存后，看看能不能登录。如果还不行，在pl/sql developer的登录窗口中点“取消”按钮，进入pl/sql developer后，执行“工具”-> “首选项” -> 连接，按下图所示进行配置（其中oracle主目录就是oracle客户端的路径）。

扩展阅读：conn时报错ora-12154 ... ora12154无法处理服务名 ... 解决ora-12154的问题 ... ora12154 tns listener ... 登录sql时出现ora-12154 ... oracle ora-12154 ... ora-12154详细解决步骤 ... 登录系统显示ora-12154 ... ora12154tnscouldnot ...