oracle数据库连接出错，很简单的错误，就是解决不了

[tanglanlanrui]

代码很简单就是连接成功后执行一个selec语句。
String dbUrl = "jdbc:oracle:thin:@localhost:1521:CLRExtProc";
String user = "scott";
String password = "tiger";
Class.forName("oracle.jdbc.driver.OracleDriver").newInstance();
c = DriverManager.getConnection(dbUrl, user, password);
Statement s = c.createStatement();
ResultSet r = s.executeQuery("select * from person");

驱动包，我从ojdbc5、6、14都试过了连那个classes12也试了，sqlplus也是可以连接数据库成功的

出错的语句为getconnetion那句

错误如下：
java.sql.SQLException: 无法从套接字读取更多的数据
at oracle.jdbc.dbaccess.DBError.throwSqlException(DBError.java:134)
at oracle.jdbc.dbaccess.DBError.throwSqlException(DBError.java:179)
at oracle.jdbc.dbaccess.DBError.check_error(DBError.java:1160)
at oracle.jdbc.ttc7.MAREngine.unmarshalUB1(MAREngine.java:963)
at oracle.jdbc.ttc7.MAREngine.unmarshalSB1(MAREngine.java:893)
at oracle.jdbc.ttc7.TTIpro.receive(TTIpro.java:133)
at oracle.jdbc.ttc7.v8TTIpro.receive(v8TTIpro.java:85)
at oracle.jdbc.ttc7.TTC7Protocol.connect(TTC7Protocol.java:1710)
at oracle.jdbc.ttc7.TTC7Protocol.logon(TTC7Protocol.java:214)
at oracle.jdbc.driver.OracleConnection.<init>(OracleConnection.java:346)
at oracle.jdbc.driver.OracleDriver.getConnectionInstance(OracleDriver.java:468)
at oracle.jdbc.driver.OracleDriver.connect(OracleDriver.java:314)
at java.sql.DriverManager.getConnection(Unknown Source)
at java.sql.DriverManager.getConnection(Unknown Source)
at test.jdbcthin.<init>(jdbcthin.java:22)
at test.jdbcthin.main(jdbcthin.java:52)
Exception in thread "main" java.lang.NullPointerException
at test.jdbcthin.executeQuery(jdbcthin.java:34)
at test.jdbcthin.main(jdbcthin.java:53)

[ZHOU西口]

oracle服务启动了？

[火影之贺]

cmd黑窗口telnet localhost 1521看看端口状态呢？

[boy_3211]

发一下完整的代码来看看咯

[头发凌乱]

下面该关闭的数据库链接关掉没有

[a179626102]

晕,oracle服务没开好呢

[tanglanlanrui]

感谢各位大神的解答，是我安装的oralce的那两个配置文件中 SID_Name的名字不匹配~已经连接成功了