JSP连接ORACLE有关问题

JSP连接ORACLE问题
try{  
Class.forName( "oracle.jdbc.driver.OracleDriver ");  
Connection   conn=DriverManager.getConnection( "jdbc:oracle:thin:@localhost:1521:zyc ", "zyc ", "zyc1984 ");  

String   str= "select   *   from   admin ";  
Statement   stat=conn.createStatement();  
ResultSet   rs=stat.executeQuery(str);  

while(rs.next()){  
out.println(rs.getString(2));  
}  
}catch(ClassNotFoundException   e){out.print(e);}  

为什么我在Class.forName( "oracle.jdbc.driver.OracleDriver ");后面加上out.println(1);就显示不出输出的数据了  
相同的语言放到类里面就能读出数据，为什么放到JSP里就不对了

[解决办法]
拋出異常了吧