我连接的用户是sys  密码是：123456 as sysdba 然后连接报错以下内容：

按道理来说sys用户不是本身就具有sysdba和sysoper身份吗怎么还是提示这个

Exception in thread "main" java.sql.SQLException: ORA-28009: 应当以 SYSDBA 身份或 SYSOPER 身份建立 SYS 连接

at oracle.jdbc.driver.T4CTTIoer11.processError(T4CTTIoer11.java:494)
at oracle.jdbc.driver.T4CTTIoer11.processError(T4CTTIoer11.java:441)
at oracle.jdbc.driver.T4CTTIoer11.processError(T4CTTIoer11.java:436)
at oracle.jdbc.driver.T4CTTIfun.processError(T4CTTIfun.java:1061)
at oracle.jdbc.driver.T4CTTIoauthenticate.processError(T4CTTIoauthenticate.java:550)
at oracle.jdbc.driver.T4CTTIfun.receive(T4CTTIfun.java:623)
at oracle.jdbc.driver.T4CTTIfun.doRPC(T4CTTIfun.java:252)
at oracle.jdbc.driver.T4CTTIoauthenticate.doOAUTH(T4CTTIoauthenticate.java:499)
at oracle.jdbc.driver.T4CTTIoauthenticate.doOAUTH(T4CTTIoauthenticate.java:1279)
at oracle.jdbc.driver.T4CConnection.logon(T4CConnection.java:663)
at oracle.jdbc.driver.PhysicalConnection.connect(PhysicalConnection.java:688)
at oracle.jdbc.driver.T4CDriverExtension.getConnection(T4CDriverExtension.java:39)
at oracle.jdbc.driver.OracleDriver.connect(OracleDriver.java:691)
at java.sql.DriverManager.getConnection(Unknown Source)
at java.sql.DriverManager.getConnection(Unknown Source)
at demo1.ConnectJDBC.main(ConnectJDBC.java:18)