懂Oracle的朋友麻烦来一下，急急急！
我装了Oracle11gR2，装好之后，用自带的黑窗口SQLplus是可以连数据库的，也可以看到自带的emp,dept等表，可是我又装了 PLSQL Developer，装好之后再登陆框上却看不到数据库，怎么办啊？很急！我看了一下我的tnsnames.ora，内容如下：


# tnsnames.ora Network Configuration File: D:\Oracle\product\11.2.0\dbhome_1\network\admin\tnsnames.ora

# Generated by Oracle configuration tools.

LISTENER_ORCL =

  (ADDRESS = (PROTOCOL = TCP)(HOST = localhost)(PORT = 1521))

 

ORACLR_CONNECTION_DATA =

  (DESCRIPTION =

  (ADDRESS_LIST =

  (ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1521))

  )

  (CONNECT_DATA =

  (SID = CLRExtProc)

  (PRESENTATION = RO)

  )

  )

ORCL =

  (DESCRIPTION =

  (ADDRESS = (PROTOCOL = TCP)(HOST = localhost)(PORT = 1521))

  (CONNECT_DATA =

  (SERVER = DEDICATED)

  (SERVICE_NAME = orcl)

  )

  )

 

其中ORCL是默认的全局数据库，我就用这个，觉的也没什么问题啊。

对了，我操作系统是64位的，装的也是64位的Oracle11gR2

我的电脑环境变量：classpath=.;%JAVA_HOME%\lib;%JAVA_HOME%\lib\tools.jar
path=D:\Oracle\product\11.2.0\dbhome_1\bin;%java_home%\bin;%java_home%\jre\bin;%SystemRoot%\system32;%SystemRoot%;%SystemRoot%\System32\Wbem;%SYSTEMROOT%\System32\WindowsPowerShell\v1.0\

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listener.ora


LISTENER =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST = localhost或IP地址)(PORT = 1521))
)
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PL/SQL登录提示什么呀，把报错信息贴出来看看