Spring saveOrUpdate method: saves or updates entity objects

saveOrUpdate(Object entity)

Example 1

public static void main(String[] args){
  ApplicationContext context = new ClassPathXmlApplicationContext("cfg/XMLConfig.xml");  //加载配置文件
  Dao dao = (Dao)context.getBean("dao");  //创建Dao
  TbUser user = new TbUser();
  user.setName("保存的用户");
  user.setSex("男");
  user.setAge(20);
  HibernateTemplate htm = dao.getHibernateTemplate();
  htm.saveOrUpdate(user);  //执行保存方法
}

Example 2

public static void main(String[] args){
  ApplicationContext context = new ClassPathXmlApplicationContext("cfg/XMLConfig.xml");  //加载配置文件
  Dao dao = (Dao)context.getBean("dao");  //创建Dao
  HibernateTemplate htm = dao.getHibernateTemplate();
  TbUser user = (TbUser)htm.get(TbUser.class,new Integer(1));
  if(user==null)
  return;
  user.setName("更新的用户");
  htm.saveOrUpdate(user);  //执行更新方法
}