seeddatabase.java

本套光盘提供了本书各章实例的所需的部分源程序文件以及数据库文件。读者 需要使用JDK 1.4(必需）版

// 厂商实现的PersistenceManagerFactory
import com.solarmetric.kodo.impl.jdbc.JDBCPersistenceManagerFactory;
import javax.jdo.PersistenceManager;
import javax.jdo.Transaction;
public class SeedDatabase {
            public static void main(String[] args) {
// 创建一个vehicles的fleet...
            Fleet fleet = new Fleet();
            fleet.addVehicle(new Bicycle("Schwinn"));
            fleet.addVehicle(new Bicycle("Giant"));
            fleet.addVehicle(new MotorVehicle(4, new Engine(8)));
            fleet.addVehicle(new MotorVehicle(2, new Engine(4)));
            fleet.addVehicle(new MotorVehicle(4, new Engine(4)));
    
// 获得的一个PersistenceManager...
	PersistenceManager pm = new JDBCPersistenceManagerFactory().getPersistenceManager();
// 开始一个transaction...
	Transaction transaction = pm.currentTransaction();
	transaction.begin();
// 存储 fleet...
	pm.makePersistent(fleet);
// 提交transaction...
	transaction.commit();
// 关闭 manager...
	pm.close();
        }
    }