1 package oracle; 2  3 import java.sql.Connection; 4 import java.sql.DriverManager; 5 import java.sql.ResultSet; 6 import java.sql.Statement; 7  8 //使用JDBC连接Oracle 9 10 public class TestOracle {11 12     public static void main(String[] args) {13         // TODO Auto-generated method stub14 15         try {16             //1.加载驱动17             Class.forName("oracle.jdbc.driver.OracleDriver");18             //2.得到连接19             Connection  conn= DriverManager.getConnection("jdbc:oracle:thin:@127.0.0.1:1521:ORACLE12C","sys as SYSDBA","fairy6280"); 20             21             Statement sm = (Statement) conn.createStatement();22             String sql = "select * from student";23             String sql1 = "select * from (select a1.*,rownum rowIndex from (select * from student order by salary) a1 where rownum <5) where rowIndex > 1";24             ResultSet rset = sm.executeQuery(sql1);25             while(rset.next())26             {27                 System.out.println("姓名:"+ rset.getString(2));28             }29             30             //加入事务处理31             conn.setAutoCommit(false);32             String sql3="update student set salary=salary -100 where sname=‘Smith‘";33             String sql4 = "update student set salary = salary +100 where sname=‘Bill‘";34             sm.executeUpdate(sql3);35             sm.executeUpdate(sql4);36             conn.commit();37             38             //关闭资源39             rset.close();40             sm.close();41             conn.close();42         } catch (Exception e) {43             // TODO: handle exception44             e.printStackTrace();45         }46         System.out.println("----------");47     }48 49 }