小编nee*_*ndu的帖子

我正在使用hibernate在intellij中执行一个SQL命令.这是我写的代码:

import models.Employee;
import org.hibernate.ejb.HibernatePersistence;
import javax.persistence.EntityManager;
import javax.persistence.EntityManagerFactory;
import javax.persistence.spi.PersistenceProvider;
import java.util.HashMap;
import java.util.List;

public class manager {
   public final static String SELECT_QUERY = new String("from Employee where id =:id");
    public static void main(String[] args){
        int id = 21577911;
        PersistenceProvider pp = new HibernatePersistence();
        EntityManagerFactory emf = pp.createEntityManagerFactory("NewPersistenceUnit", new HashMap());
        EntityManager em = emf.createEntityManager();
        List<Employee> employees = em.createQuery(SELECT_QUERY, Employee.class).setParameter("id", id).getResultList();
        System.out.println(employees);
        em.close();
    }
}

这些是错误:

Exception in thread "main" javax.persistence.PersistenceException: org.hibernate.exception.GenericJDBCException: could not extract ResultSet
    at org.hibernate.ejb.AbstractEntityManagerImpl.convert(AbstractEntityManagerImpl.java:1387)
    at org.hibernate.ejb.AbstractEntityManagerImpl.convert(AbstractEntityManagerImpl.java:1310) …