What are MyBatis level cache and second level cache?

MyBatis is a popular Java persistence framework that provides many features to simplify database access. Two of the important features are the first-level cache and the second-level cache, which can significantly improve the performance of your application.

The first-level cache is a local caching mechanism enabled by MyBatis by default. It is associated with a session (SqlSession), and multiple queries in the same session can share the cache. When a query statement is executed, the query results will be stored in the first-level cache. The next time the same query can obtain the results directly from the cache without accessing the database again. This can reduce the number of database accesses and improve query performance.

Here is an example using MyBatis first-level cache:

SqlSessionFactory sqlSessionFactory = new SqlSessionFactoryBuilder().build(inputStream);
SqlSession sqlSession = sqlSessio