Java8 JDBC改进

import java.sql.*;  
// implementing DriverAction interface
class JdbcExample implements DriverAction{  
  // implementing deregister method of DriverAction interface
  @Override
  public void deregister() {
    System.out.println("Driver deregistered");
  }
  public static void main(String args[]){
    try{
      // Creating driver instance
      Driver driver = new com.mysql.jdbc.Driver();
      // Creating Action Driver
      DriverAction da = new JdbcExample();
      // Registering driver by passing driver and driverAction
      DriverManager.registerDriver(driver, da);
      // Creating connection
      Connection con=DriverManager.getConnection("jdbc:mysql://localhost:3306/student","root","mysql");
      //Here student is database name, root is username and password is mysql
      Statement stmt=con.createStatement(); 
      // Executing SQL query
      ResultSet rs=stmt.executeQuery("select * from user");  
      while(rs.next()){  
        System.out.println(rs.getInt(1)+""+rs.getString(2)+""+rs.getString(3));  
      }
      // Closing connection
      con.close();  
      // Calling deregisterDriver method
      DriverManager.deregisterDriver(driver);
    }catch(Exception e){ System.out.println(e);}  
  }  
  
}  

1  Arun  25
2  irfan  22
3  Neraj kumar  25
Driver deregistered