java密码为null,java.sql.SQLException：ORA-01005：给出null密码;登录被拒绝

我在尝试连接数据库时遇到了以下异常：

java.sql.SQLException: ORA-01005: null password given; logon denied

at oracle.jdbc.driver.T4CTTIoer.processError(T4CTTIoer.java:450)

at oracle.jdbc.driver.T4CTTIoer.processError(T4CTTIoer.java:392)

at oracle.jdbc.driver.T4CTTIoer.processError(T4CTTIoer.java:385)

at oracle.jdbc.driver.T4CTTIfun.processError(T4CTTIfun.java:938)

at oracle.jdbc.driver.T4CTTIoauthenticate.processError(T4CTTIoauthenticate.java:480)

at oracle.jdbc.driver.T4CTTIfun.receive(T4CTTIfun.java:655)

at oracle.jdbc.driver.T4CTTIfun.doRPC(T4CTTIfun.java:249)

at oracle.jdbc.driver.T4CTTIoauthenticate.doOAUTH(T4CTTIoauthenticate.java:416)

at oracle.jdbc.driver.T4CTTIoauthenticate.doOAUTH(T4CTTIoauthenticate.java:825)

at oracle.jdbc.driver.T4CConnection.logon(T4CConnection.java:596)

at oracle.jdbc.driver.PhysicalConnection.(PhysicalConnection.java:715)

at oracle.jdbc.driver.T4CConnection.(T4CConnection.java:385)

at oracle.jdbc.driver.T4CDriverExtension.getConnection(T4CDriverExtension.java:30)

at oracle.jdbc.driver.OracleDriver.connect(OracleDriver.java:564)

at java.sql.DriverManager.getConnection(DriverManager.java:675)

at java.sql.DriverManager.getConnection(DriverManager.java:258)

at com.alting.db.ManagerDB.getConnection(ManagerDB.java:57)

at com.alting.db.ManagerDB.openConnection(ManagerDB.java:75)

at com.alting.med.EventGenerator.exportData(EventGenerator.java:220)

at com.alting.med.Main.main(Main.java:252)

这里用于获取连接的方法：

private Connection getConnection(String url, String driverClass, String user, String password) throws ManagerDBException

{

try

{

Class.forName(driverClass);

} catch (ClassNotFoundException e) {

throw new ManagerDBException(e.getMessage());

}

try

{

this.connection = DriverManager.getConnection(url, user, password);

}

catch (SQLException e)

{

throw new ManagerDBException(e.getMessage());

}

return this.connection;

}

但即使params(url,密码..)被硬编码,我仍然得到例外.

你能告诉我如何解决这个问题吗？

谢谢