domino8.5 连接oracle问题

java.sql.SQLException: No suitable driver
        at java.sql.DriverManager.getConnection(Unknown Source)
        at java.sql.DriverManager.getConnection(Unknown Source)
        at JavaAgent.NotesMain(JavaAgent.java:59)
        at lotus.domino.AgentBase.runNotes(Unknown Source)
        at lotus.domino.NotesThread.run(Unknown Source)
内存回收
java.lang.NullPointerException
        at JavaAgent.NotesMain(Jajava.sql.SQLException: No suitable driver
        at java.sql.DriverManager.getConnection(Unknown Source)
        at java.sql.DriverManager.getConnection(Unknown Source)

这个程序在domino6.5跑是不会报错的，domino8.5上运行就会报错，不知道驱动用哪个，请教下有经验的各位，谢谢