Oracle中listener does not currently know of SID given in connect descriptor

转载自：http://fengqx.iteye.com/blog/419412

一次连接数据库怎么也连接不上，查了多方面资料，终于找到答案，总结

首先应该保证数据库的服务启动
在myeclipse的数据库视图中点右键->new 弹出database driver的窗口，
Driver template选择oracle（thin driver），
Driver name 输入oracle
connection URL=jdbc:oracle:thin:@localhost:1521: oracle 注意localhost:1521:oracle中的oracle是数据库得sid换成你自己数据库的sid就可以
username：登陆数据库具有system权限的用户名
password：登陆数据库具有system权限的密码
点击add jar 选择ojdbc14.jar的存放位置,没有得可以到百度下一个叫ojdbc14.jar的文件。
点击test driver 到此成功配置。

关于启动数据库后提示ora-12505的解决方法：
"listener does not currently know of SID given in connect descriptor"

第一种可能
是配置得数据库sid名不正确localhost:1521: oracle 即红字部分不是你本机得sid，那么如何查看本机得sid呢？用如下命令 SELECT   NAME   FROM   v$database;在sqlplus中执行就可以看到，把红字部分换成查询出来的sid就可以。
第二种可能
发现sid配置没有错误，但是还是报错，那可能就是oracle得监听配置出了问题，需要检查listener.ora文件，用记事本打开，
正确配置如下：
# listener.ora Network Configuration File: e:\oracle\product\10.2.0\db_1\network\admin\listener.ora
# Generated by Oracle configuration tools.
SID_LIST_LISTENER =
(SID_LIST =
    (SID_DESC =
      (SID_NAME = PLSExtProc)
      (ORACLE_HOME = e:\oracle\product\10.2.0\db_1)
      (PROGRAM = extproc)
    )
    (SID_DESC =
      (GLOBAL_DBNAME = oracle )
      (ORACLE_HOME = e:\oracle\product\10.2.0\db_1)
      (SID_NAME = oracle )
    )
)
LISTENER =
(DESCRIPTION_LIST =
    (DESCRIPTION =
      (ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1))
      (ADDRESS = (PROTOCOL = TCP)(HOST = localhost)(PORT = 1521))
    )
)
红字部分改成 oracle 创建时候的sid 保存退出。

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