Shulou(Shulou.com)06/02 Report--

This article mainly explains "the principle and use of MyBatis". Interested friends may wish to have a look at it. The method introduced in this paper is simple, fast and practical. Let's let the editor take you to learn the principle and use of MyBatis.

Dependency: jar

Org.mybatis mybatis 3.2.7 org.mybatis mybatis-spring 1.2.2

1. The most efficient method for batch insertion is to return the primary key ID:

INSERT INTO t_user (id, name, del_flag) VALUES (# {user.id}, # {user.name}, # {user.delFlag})

Special symbol handling:

In fact, it is the special symbol of xml, the way of escape.

> & apos;'""

For example:

Select (case when (UNIX_TIMESTAMP (now ())-UNIX_TIMESTAMP (ur.offline_time)-5 × 60 / 1000) > 0 then'1' else'0' end) as offline_flag from...

Use symbols to explain, and such symbols are not parsed.

For example:

And

For parameter fields, you can use the syntax of ibatis.

Equal. No, wait. Greater than or equal to less than

For example:

U.username like'% $username$%' concat (u.UNIX_TIMESTAMP (now ())-UNIX_TIMESTAMP (ur.offline_time)-5cm 600000) > 0 and order by u.online_time asc order by u.online_time desc order by u.register_time asc order by u.register_time desc order by u.app_version asc order by u.app_version desc so far. I believe you have a deeper understanding of "the principle and use of MyBatis". You might as well do it in practice. Here is the website, more related content can enter the relevant channels to inquire, follow us, continue to learn!

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