Understand MyBatis-Plus: an artifact that simplifies the operation of the persistence layer

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MyBatis-Plus is an enhanced tool based on MyBatis, which provides a more powerful and convenient way to operate the persistence layer, and greatly simplifies the developer's operation on the database. This article will introduce the features and usage of MyBatis-Plus to help readers better understand and use this powerful tool.

1. Features

1. Simplified CRUD operations: MyBatis-Plus provides a series of CRUD operation methods. Developers do not need to write cumbersome SQL statements, but only need to simply call the API to complete the addition, deletion, modification, and query operations of the database.
2. Automatic paging function: MyBatis-Plus has a built-in paging plug-in, which can easily realize the paging query function without manually writing paging SQL statements.
3. Code generator: MyBatis-Plus provides a set of code generators that can automatically generate entity classes, Mapper interfaces, and XML mapping files according to the database table structure, greatly speeding up development efficiency.
4. Powerful condition builder: MyBatis-Plus provides a flexible condition builder, which supports the combination of various query conditions, and can easily realize complex query requirements.
5. Support primary key strategy: MyBatis-Plus supports multiple primary key strategies, including auto-increment, UUID, snowflake algorithm, etc. Developers can choose the appropriate primary key strategy according to actual needs.

2. How to use

1. Introducing dependencies: Add MyBatis-Plus dependencies in the project's pom.xml file.
2. Configure data source: Configure database connection information in the configuration file.
3. Create entity classes: Create corresponding entity classes according to the database table structure, and use annotations to mark the mapping relationship between fields and tables.
4. Create a Mapper interface: Create a Mapper interface that inherits the BaseMapper interface and annotate it with the @Mapper annotation.
5. Configure the XML mapping file of the Mapper interface: write the XML mapping file of the Mapper interface, and configure the mapping relationship between SQL statements and methods.
6. Use the API of MyBatis-Plus for database operations: by calling the API provided by MyBatis-Plus, perform database addition, deletion, modification, and query operations.

3. Summary
MyBatis-Plus is a powerful persistence layer operation tool that can greatly simplify developers' operations on the database. Through its simplified CRUD operations, automatic paging function, code generator and other features, developers can develop and maintain database applications more efficiently. I hope this article will be helpful for readers to understand and use MyBatis-Plus. Welcome to communicate and share more.