Transaction not successfully started 处理办法

最新推荐文章于 2024-06-20 14:28:37 发布

转载最新推荐文章于 2024-06-20 14:28:37 发布 · 1.6k 阅读

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本文讨论了在使用Hibernate进行对象持久化时遇到的一个常见问题：事务未成功开始导致的异常。提供了详细的错误诊断步骤和解决方案，并通过优化代码结构来避免此类问题的发生，以提高应用程序的整体性能。

package com.demo.hibernate.dao;

import org.hibernate.HibernateException;
import org.hibernate.Query;
import org.hibernate.Session;
import org.hibernate.Transaction;

import com.demo.hibernate.beans.User;
import com.demo.hibernate.util.HibernateSessionFactory;

public class UserDAO {
	public User getUser(String username) throws HibernateException{
		Session session = null;
		Transaction tx = null;
		User user = null;
		try{
			session = HibernateSessionFactory.currentSession();
			tx = session.beginTransaction();
			Query query = session.createQuery("from User where username=?");
			query.setString(0, username.trim());
			user = (User)query.uniqueResult();
			query = null;
			tx.commit();
		}catch(HibernateException e){
			if(tx!=null){
				tx.rollback();
			}
			throw e;
		}finally{
			HibernateSessionFactory.closeSession();
		}
		return user;
	}

}

控制台出现报错

Exception in thread "main" org.hibernate.TransactionException: Transaction not successfully started
at org.hibernate.transaction.JDBCTransaction.rollback(JDBCTransaction.java:149)

解决方法：

catch (HibernateException e) {
   if (tx != null) {
    tx.rollback();
   }
   throw e;
  } finally {

   HibernateSessionFactory.closeSession();
  }