OO与数据库的另一种连接方法

db4o

下面这段代码抄自[http://www.ibm.com/developerworks/cn/java/j-db4o1.html]

---引用开始
import com.db4o.*;

import com.tedneward.model.*;

public class Hellodb4o
{
public static void main(String[] args)
throws Exception
{
ObjectContainer db = null;
try
{
db = Db4o.openFile("persons.data");

Person brian = new Person("Brian", "Goetz", 39);
Person jason = new Person("Jason", "Hunter", 35);
Person clinton = new Person("Brian", "Sletten", 38);
Person david = new Person("David", "Geary", 55);
Person glenn = new Person("Glenn", "Vanderberg", 40);
Person neal = new Person("Neal", "Ford", 39);

db.set(brian);
db.set(jason);
db.set(clinton);
db.set(david);
db.set(glenn);
db.set(neal);

db.commit();

// Find all the Brians
ObjectSet brians = db.get(new Person("Brian", null, 0));
while (brians.hasNext())
System.out.println(brians.next());
}
finally
{
if (db != null)
db.close();
}
}
}
---引用结束