hibernate课程 初探单表映射2-4 transaction简介

1　　　　hibernate是非自动提交。如果transaction不写的话，会只创建表结构而不插入语句。

　　　　  如果不写transaction而想实现插入的功能的话，需要重写session的dowork方法（记得flush）。

2　　　　demo:

package hibernate_001;

import java.sql.Array; import java.sql.Blob; import java.sql.CallableStatement; import java.sql.Clob; import java.sql.DatabaseMetaData; import java.sql.NClob; import java.sql.PreparedStatement; import java.sql.SQLClientInfoException; import java.sql.SQLException; import java.sql.SQLWarning; import java.sql.SQLXML; import java.sql.Savepoint; import java.sql.Statement; import java.sql.Struct; import java.util.Date; import java.util.Map; import java.util.Properties; import java.util.TimeZone; import java.util.concurrent.Executor;

import org.hibernate.Session; import org.hibernate.SessionFactory; import org.hibernate.Transaction; import org.hibernate.cfg.Configuration; import org.hibernate.jdbc.Work; import org.hibernate.service.ServiceRegistry; import org.hibernate.service.ServiceRegistryBuilder; import org.junit.After; import org.junit.Before; import org.junit.Test;

import com.ddwei.student.Student; import com.mysql.jdbc.Connection; import com.mysql.jdbc.ExceptionInterceptor; import com.mysql.jdbc.Extension; import com.mysql.jdbc.MySQLConnection; import com.mysql.jdbc.log.Log;

public class StudentTest {    private SessionFactory sessionFactory;  private Session session;  private Transaction trasaction;    @Test  public void testSaveStudent(){   Student student =new Student(3,"周恩来","男",new Date(),"绍兴");//创建学生对象   session.save(student);//会话保存学生对象进入数据库        }    @Before  public void init(){   //1  创建配置对象   Configuration config = new Configuration().configure();   //2  创建服务对象   ServiceRegistry serviceRe = new ServiceRegistryBuilder().applySettings(config.getProperties()).buildServiceRegistry();      //3  创建会话工厂   sessionFactory = config.buildSessionFactory(serviceRe);      //4  打开会话   session = sessionFactory.openSession();   //5  创建事务 //  trasaction = session.beginTransaction();  }      @After  public void destroy(){ //  trasaction.commit();   session.doWork(new Work() {        @Override    public void execute(java.sql.Connection arg0) throws SQLException {     // TODO Auto-generated method stub     arg0.setAutoCommit(true);         }   });   session.flush();   session.close();   sessionFactory.close();  }  

}