Mapped Statements collection does not contain value for userfindAll

The error message suggests that the Mapped Statements collection does not contain a value for the statement "user.findAll".

There could be a few reasons for this error:

1. The statement "user.findAll" is not defined in your MyBatis configuration file (usually named "mybatis-config.xml"). Make sure that you have defined the statement correctly in the mapper XML file and that the mapper XML file is correctly referenced in the configuration file.

2. The mapper interface or XML file containing the "user.findAll" statement is not being scanned or included in the MyBatis configuration. Check the configuration to ensure that the mapper interface or XML file is being scanned and included.

3. The namespace or package of the mapper interface or XML file containing the "user.findAll" statement is different from the namespace or package specified in the MyBatis configuration. Check that the namespace or package is correctly specified in both the mapper interface or XML file and the MyBatis configuration.

4. There may be a typo or case sensitivity issue in the statement name. Double-check the spelling and case of the statement name in both the mapper interface or XML file and the MyBatis configuration.

By resolving these issues, you should be able to fix the "Mapped Statements collection does not contain value for user.findAll" error