public static void main(String[] args) {
// TODO Auto-generated method stub
Integer primaryKey = createHoney();
System.out.println("primary key is " + primaryKey);
}
在Main函数中打印出来的primaryKey是NUll，不知道为什么。我的表的主键用的是Number型的，开始的时候再Hbm.xml中我用的是sequence并且在数据库中也创建了sequence同样的结果。我后来用了uuid,native也是不可以。请高手帮忙解决。
// TODO Auto-generated method stub
Integer primaryKey = createHoney();
System.out.println("primary key is " + primaryKey);
}
在Main函数中打印出来的primaryKey是NUll，不知道为什么。我的表的主键用的是Number型的，开始的时候再Hbm.xml中我用的是sequence并且在数据库中也创建了sequence同样的结果。我后来用了uuid,native也是不可以。请高手帮忙解决。
* @param args
*/
public static void main(String[] args) {
// TODO Auto-generated method stub
Long primaryKey = createHoney();
System.out.println("primary key is " + primaryKey);
} private static Long createHoney() {
Session session = null;
Transaction tx = null;
Logger log = Logger.getLogger("TestClient"); log.info("creating honey"); // [laliluna] our returned primary key
Long id = null; try {
// [laliluna] get the session from the factory
session = HibernateUtil.currentSession(); // [laliluna] always start a transaction before doing something
// (even reading) from the database
tx = session.beginTransaction();
// [laliluna] create a new object
Userlist userList = new Userlist();
userList.setUsername("123");
userList.setUserpwd("123"); // [laliluna] save it to the database, Hibernate returns your object
// with the primary key field updated!
id = (Long) session.save(userList); // [laliluna] commit your transaction or nothing is wrote to the db
tx.commit(); // [laliluna] clean up (close the session)
session.close(); } catch (HibernateException e) { // [laliluna] when an error occured, try to rollback your
// transaction
if (tx != null)
try {
tx.rollback();
} catch (HibernateException e1) {
log.warn("rollback not successful");
}
/*
* [laliluna] close your session after an exception!! Your session
* is in an undefined and unstable situation so throw it away!
*
*/
if (session != null)
try {
session.close();
} catch (HibernateException e2) {
log.warn("session close not successful");
}
} return id;
}