java.sql.SQLException: Io 异常: The Network Adapter could not establish the connection是我今天刚遇到的问题，有很
多原因导致这个，网上也有答案，我的主要毛病是在hibernate.properties文件中没有把hibernate.properties中的行：
hibernate.connection.url jdbc:oracle:thin:@localhost:1521:oracle
最后一个oracle替换为我的oracle_sid，改成orcl后就没事，还有一些解决方法。我一一列出：
1、把卡巴斯基防火墙关掉就好了
2、oracle/ora92/network/admin/listener.ora 和 oracle/ora92/network/admin/tnsnames.ora 的设置问题。
两个文件如下：
listener.ora:
# LISTENER.ORA Network Configuration File: F:/oracle/ora92/network/admin/listener.ora
# Generated by Oracle configuration tools.
LISTENER =
(DESCRIPTION_LIST =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC0))
)
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = lei)(PORT = 1521))
)
)
)
#change 1521 to 1523 this is oracle92's listener
SID_LIST_LISTENER =
(SID_LIST =
(SID_DESC =
(SID_NAME = PLSExtProc)
(ORACLE_HOME = F:/oracle/ora92)
(PROGRAM = extproc)
)
(SID_DESC =
(GLOBAL_DBNAME = orcl)
(ORACLE_HOME = F:/oracle/ora92)
(SID_NAME = orcl)
)
)
tnsnames.ora：
# TNSNAMES.ORA Network Configuration File: F:/oracle/ora92/network/admin/tnsnames.ora
# Generated by Oracle configuration tools.
ORCL =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = lei)(PORT = 1521))
)
(CONNECT_DATA =
(SERVER = DEDICATED)
(SERVICE_NAME = orcl)
)
)
INST1_HTTP =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = lei)(PORT = 1521))
)
(CONNECT_DATA =
(SERVER = SHARED)
(SERVICE_NAME = MODOSE)
(PRESENTATION = http://HRService)
)
)
EXTPROC_CONNECTION_DATA =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC0))
)
(CONNECT_DATA =
(SID = PLSExtProc)
(PRESENTATION = RO)
)
)
比如，listener.ora中的host写错了。不同的版本所需要的portable也不会一样的。
还是非常感谢大家！！