What are the differences between load and get in Hibernate

This article will explain in detail what are the differences between load and get in Hibernate. The editor thinks it is very practical, so I share it with you for reference. I hope you can get something after reading this article.

1. The timing of reading is different (when lazy=true)

Hibernate load uses a delay mechanism (load statements do not read the library, etc.), while Hibernate get does not use a delay mechanism (read the library immediately when get statements are used).

two。 What happens when no data is found

When the search data does not exist, Hibernate load still returns an object and throws an exception when you use the object's non-primary key data

When the search data does not exist, Hibernate get will return a null

Note: it seems on the Internet that load saves more resources than get.

I have done an example, that is, two threads, thread 1 reads the data and turns off the session. Thread 2 reads the same record a few seconds later, and thread 2 does not search the database (no HQL statement is shown), whether you use load or get.

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