Welcome 微信登录

首页 / 软件开发 / JAVA / Hibernate批量更新与批理删除

Hibernate批量更新与批理删除2011-02-15批理修改:

场景:如有一个学生表Student,现有一属性[学院]改名,从"计算机学院"改为"计算机工程学院"[不考虑学院表].

用Hibernate实现这种批理更新的方法一DML(数据操作语言)操作。代码如下:

public void updateUser(String newName,String oldName) {
Session session = null;
try{
session = this.getSession();
Transaction tc = session.beginTransaction();

String hqlUpdate = "update Student set deptName=:newName where deptName= :oldName";
int updatedEntities = s.createQuery( hqlUpdate )
.setString( "newName", newName )
.setString( "oldName", oldName )
.executeUpdate();

tc.commit();
}catch(RuntimeException re){
log.debug(re.getMessage(),re);
throw re;
}finally{
if (session != null){
session.close();
}
}
}

方法二绕过Hibernate API,用JDBC实现。

public void UpdateUser(String newName,String oldName) {
Session session = null;
try{
session = this.getSession();
Transaction tc = session.beginTransaction();

Connection connection = session.connection();

PreparedStatement ps = connection.prepareStatement("update Student set deptName=""+newName+"" where deptName= ""+oldName+""");

ps.execute();

tc.commit();

}catch(RuntimeException re){
log.debug(re.getMessage(),re);
throw re;
}catch(SQLException e){
log.debug(e.getMessage(),e);
}finally{
if (session != null){
session.close();
}
}
}