关于hibernate中出现 String index out of range: -1 求大神

[TheKingsSpeech]

我就是插入个数据而已嘛 请问哪越界了

public class HibernateTest
{
	private static SessionFactory sessionFactory;
	static
	{
		try
		{
			sessionFactory = new Configuration().configure().buildSessionFactory();
		} catch (Exception e)
		{
			e.printStackTrace();
		}
	}
	
	public static void main(String[] args) throws Exception
	{
		People people = new People();
		people.setUsername("aiyobucuo");
		people.setPassword("wocao");
		people.setTelphone(123456);
		people.setGender('F');
		people.setGraduation(true);
		people.setBirthday(new java.sql.Date(new java.util.Date().getTime()));
		people.setMarryTime(new Timestamp(new java.util.Date().getTime()));
		
		
		InputStream is = new FileInputStream("c:/ThinkingInJava.pdf");
		int length = is.available();
		byte[] buffer = new byte[length];
		is.read(buffer);
		
		people.setFile(buffer);
		Session session = sessionFactory.openSession();
		Transaction tx = null;
	
		try
		{
			session.beginTransaction();
			session.save(people);
			tx.commit();
		} catch (Exception e)
		{
			if(null != tx)
			{
				tx.rollback();
			}
		} finally
		{
			session.close();
		}
	}
}	

java.lang.StringIndexOutOfBoundsException: String index out of range: -1
at java.lang.String.substring(String.java:1937)
at java.lang.String.substring(String.java:1904)
at org.hibernate.connection.ConnectionProviderFactory.getConnectionProperties(ConnectionProviderFactory.java:157)
at org.hibernate.connection.DriverManagerConnectionProvider.configure(DriverManagerConnectionProvider.java:101)
at org.hibernate.connection.ConnectionProviderFactory.newConnectionProvider(ConnectionProviderFactory.java:137)
at org.hibernate.connection.ConnectionProviderFactory.newConnectionProvider(ConnectionProviderFactory.java:79)
at org.hibernate.cfg.SettingsFactory.createConnectionProvider(SettingsFactory.java:425)
at org.hibernate.cfg.SettingsFactory.buildSettings(SettingsFactory.java:89)
at org.hibernate.cfg.Configuration.buildSettingsInternal(Configuration.java:2119)
at org.hibernate.cfg.Configuration.buildSettings(Configuration.java:2115)
at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1339)
at com.s.test.HibernateTest.<clinit>(HibernateTest.java:21)
Exception in thread "main" java.lang.NullPointerException
at com.s.test.HibernateTest.main(HibernateTest.java:46)

[TheKingsSpeech]

求大神 跪求各路大神
帮我看下吧