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This article mainly introduces "what is the principle of mybatis". In daily operation, I believe many people have doubts about the principle of mybatis. The editor consulted all kinds of materials and sorted out simple and easy-to-use methods of operation. I hope it will be helpful for you to answer the doubts about "what is the principle of mybatis?" Next, please follow the editor to study!

Mybatis: four core components

SqlSessionFactoryBuilder (constructor): sqlsessionFactory is generated through configuration or code, using builder mode, and sqlsessionFactory is generally generated from mybatis-config.xml files

SqlSessionFactory: using the factory pattern to generate sqlsession.sqlsessionFactory is an interface, and there are two implementation classes in mybatis: SqlSessionManager and DefaultSqlSessionFactory. It is generally implemented by DefaultSqlSessionFactory. SqlSessionManager is used in a multithreaded environment, but its implementation still depends on DefaultSqlSessionFactory.

SqlSession (session): you can send sql execution to return results, or you can get the mapper interface. In actual use, xml configuration files are generally used. There are also two implementation classes in mybatis: DefaultSqlSession (single thread) and SqlSessionManager (multithread). The role of sqlSession is similar to that of Connection in JDBC. He has three functions: get the mapper interface, send sql to the database, and control database transactions.

SqlMapper (Mapper): it is composed of java interface and mapper.xml file. You need to give the corresponding sql and mapping rules. You are responsible for sending sql to execute and return the result.

At this point, the study of "what is the principle of mybatis" is over. I hope to be able to solve your doubts. The collocation of theory and practice can better help you learn, go and try it! If you want to continue to learn more related knowledge, please continue to follow the website, the editor will continue to work hard to bring you more practical articles!

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