MyBatis BindingException: Parameter 'userName' Not Found - Troubleshooting Guide

This exception is thrown when MyBatis cannot find the specified parameter in the SQL statement. In this case, the parameter 'userName' is not found in the SQL statement, but there are other available parameters such as 'arg0', 'collection', and 'list'.

To fix this issue, you need to ensure that the parameter 'userName' is correctly referenced in the SQL statement. Double-check the spelling and casing of the parameter name in both the SQL statement and the Java code where the MyBatis query is defined.

For example, if your SQL statement looks like this:

SELECT * FROM users WHERE username = #{userName}

Make sure that the parameter name in your Java code is 'userName' and that you are passing it correctly when executing the MyBatis query.