Question

JAVA连接到oracle 总出现问题 驱动我已经连接好了 求讲解

java.sql.SQLException: Listener refused the connection with the following error:
ORA-12505, TNS:listener does not currently know of SID given in connect descriptor
The Connection descriptor used by the client was:
localhost:1521:orcl
at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:111)
at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:260)
at oracle.jdbc.driver.T4CConnection.logon(T4CConnection.java:386)
at oracle.jdbc.driver.PhysicalConnection.<init>(PhysicalConnection.java:413)
at oracle.jdbc.driver.T4CConnection.<init>(T4CConnection.java:164)
at oracle.jdbc.driver.T4CDriverExtension.getConnection(T4CDriverExtension.java:34)
at oracle.jdbc.driver.OracleDriver.connect(OracleDriver.java:752)
at java.sql.DriverManager.getConnection(DriverManager.java:579)
at java.sql.DriverManager.getConnection(DriverManager.java:221)
at gogo.gogogo.template(gogogo.java:29)
at gogo.gogogo.main(gogogo.java:13)

这是报错 请问这是为什么啊

Answer 1

数据库的问题，连接没配置对，或者数据库实例连不上，你先用plsql连一下试试看。

Answer 2

应该是sid不正确，给你个链接看看，希望对你有帮助：http://qingfengjushi1.iteye.com/blog/698519。

追问

请问我改了之后无法保存怎么办啊

Answer 3

确定启动oracle服务了，以及项目有jdbc的jar包

追问

恩 jar包也加了 SID也改了 还是不可以 。。。。