How to configure MyBatis second-level cache?

MyBatis’s second-level cache can be configured in the MyBatis configuration file. Below are the steps to configure the second-level cache.

1. Open the configuration file for MyBatis (usually mybatis-config.xml).
2. Add the element under the element.
3. Add a new element under the element, set the name attribute to cacheEnabled, and set the value attribute to true to enable the second-level cache. For example:

<configuration>
  <settings>
    <setting name="cacheEnabled" value="true"/>
  </settings>
</configuration>

1. store of data or information that is temporarily held in a computer’s memory for future use

<mapper namespace="com.example.UserMapper">
  <cache/>
  ...
</mapper>

1. I only need one option of caching.
2. forced removal from a property
3. time interval for flushing out data
4. uneditable

Points to note:

1. By default, MyBatis’s second-level cache is enabled, but if the cacheEnabled is not explicitly set to true in the configuration file, it will use the default settings. Under the default settings, only query results within the same session are cached.
2. MyBatis’s second-level cache is based on Mapper, meaning that the query results of the same Mapper will be cached, while the query results of different Mappers are separate.
3. For operations involving data updates (such as insertion, updating, deletion), MyBatis will automatically clear the corresponding cache.