Hibernate：加载vs获取 [英] Hibernate: load vs get

问题描述

我知道这是一个很多时候被描述的常见问题。
但是我仍然无法得到一些东西 - 那么性能呢？哪种方法更快？

实际上，我需要一个简单的事情：页面发出POST请求：id = 0，name ='John'。服务器端脚本应该检查id = 0，然后在数据库中创建一个新记录，否则更新现有的。

我认为get（）对我更有用因为在DB中不存在记录的情况下它将返回NULL，而load（）可以返回一些temproray对象。我是对的吗？
谢谢

解决方案

这是Hibernate论坛中等效问题的链接，这是我的谷歌query（ Hibernate load vs get ）： https：//论坛

其中包括以下内容：


blockquote>

load（）方法较旧;由于用户
请求，get（）被添加到Hibernate的API中。差异是微不足道的：

如果load（）在缓存或数据库中找不到对象，则抛出异常
。 load（）方法永远不会返回null。如果找不到对象，则get（）方法返回
null。

I know that this is a common question that was described a lot of times. But still I can't get some thing - what about performance? Which method is faster?

Actually, I need a simple thing: the page makes a POST-request: id=0, name='John'. The server-side script should check if id=0, then create a new record in DB, otherwise update existing.

I think that get() is more usefull for me because it will return a NULL in case of record is not exists in DB, while load() can return some temproray object.. Am I right? Thank you

解决方案

Here's a link to the equivalent question in the Hibernate forum which was the first result in my google query (Hibernate load vs get): https://forum.hibernate.org/viewtopic.php?p=2387456

There it states the following:

The load() method is older; get() was added to Hibernate’s API due to user request. The difference is trivial:

If load() can’t find the object in the cache or database, an exception is thrown. The load() method never returns null. The get() method returns null if the object can’t be found.

这篇关于Hibernate：加载vs获取的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！