求助 在用hibernate进行保存时出现下面问题:
请问怎么解决……
实体类和配置文件关键部分
测试代码:@Test
public void test() {
Configuration configuration = new Configuration();
configuration.configure();
SessionFactory factory = configuration.buildSessionFactory();
Session session = factory.openSession();
Transaction tx = session.getTransaction();
tx.begin();
Customer customer = new Customer();
customer.setCus_id(10);
customer.setCus_name("张三");
session.save(customer);
tx.commit();
session.close();
}报错如下:
java.lang.ClassCastException: class org.hibernate.id.IdentifierGeneratorHelper$2 cannot be cast to class java.lang.Integer (org.hibernate.id.IdentifierGeneratorHelper$2 is in unnamed module of loader 'app'; java.lang.Integer is in module java.base of loader 'bootstrap')
请问怎么解决……
实体类和配置文件关键部分
测试代码:@Test
public void test() {
Configuration configuration = new Configuration();
configuration.configure();
SessionFactory factory = configuration.buildSessionFactory();
Session session = factory.openSession();
Transaction tx = session.getTransaction();
tx.begin();
Customer customer = new Customer();
customer.setCus_id(10);
customer.setCus_name("张三");
session.save(customer);
tx.commit();
session.close();
}报错如下:
java.lang.ClassCastException: class org.hibernate.id.IdentifierGeneratorHelper$2 cannot be cast to class java.lang.Integer (org.hibernate.id.IdentifierGeneratorHelper$2 is in unnamed module of loader 'app'; java.lang.Integer is in module java.base of loader 'bootstrap')
“native”
由 Hibernate 根据使用的数据库自行判断采用 identity、hilo、sequence 其中一种作为主键生成方式。 在HIBERNATE配置中native是默认的,泛指的自增,也就是说除了oracle数据库外(oracle下用native需要用到一个叫hibernate_sequence的sequence),大部分数据库你都可以使用默认的native来代表自增。