Mybatis concept
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MyBatis is an excellent persistence layer framework
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It supports customized SQL, stored procedures, and advanced mapping.
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MyBatis avoids almost all JDBC code and manually setting parameters and obtaining result sets.
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MyBatis can use simple XML or annotations to configure and map native types, interfaces, and Java POJOs as records in the database.
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MyBatis was originally an open source project of a pache iBatis
Data persistence and persistence layer
Persistence is the process of transforming program data in a persistent state and a transient state. The reasons for persistence:
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Because the memory has the characteristics of "lost power"
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There are some objects that cannot be lost when power is turned off
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Memory cost is too expensive
The so-called persistence layer is the code block that completes the persistence work
