oracle连接sql developer异常

找到以下目录,/opt/oracle/product/10.2.0/db_1/network/admin，修改listener.ora，（find -name listener.ora即可找到该文件）为： SID_LIST_LISTENER = (SID_LIST = (SID_DESC = (SID_NAME = PLSExtProc) (ORACLE_HOME = /export/home/oracle/app/oracle/p

找到以下目录,/opt/oracle/product/10.2.0/db_1/network/admin，修改listener.ora，（find -name listener.ora即可找到该文件）为：

SID_LIST_LISTENER =
(SID_LIST =
(SID_DESC =
(SID_NAME = PLSExtProc)
(ORACLE_HOME = /export/home/oracle/app/oracle/product/11.2.0/dbhome_1)
(PROGRAM = extproc)
)
(SID_DESC =
(GLOBAL_DBNAME = ORCL)
(ORACLE_HOME = /export/home/oracle/app/oracle/product/11.2.0/dbhome_1)
(SID_NAME = ORCL)
)
)

红色为新增

在连接时还是报异常，说什么文件路径不存在，原因是我把orcl小写了，改成大写后连接成功

异常: The Network Adapter could not establish the connection

解决方法：将host改为主机名

如果还不行，使用netmgr工具配置监听器地址，工具地址：ORACLE_HOME/bin。

打开后Oracle Net Configuration->Local->Listeners->LISTENER->Add Address添加地址，

Protocal: TCP/IP Host: oracle所在的IP地址 Port:1521

然后保存，此异常解决。感谢博主http://yin123.blog.51cto.com/882581/428100的指点

http://blog.csdn.net/aaa1117a8w5s6d/article/details/8915517