Introduction - If you have any usage issues, please Google them yourself
[1] uses an exception mapping mechanism to uniformly manage error messages in a project
[2] uses serialization and anti serialization techniques to implement deep replication of objects
[3] uses JFreeChart to export the answer data of the multiple-choice question to pie charts
[4] uses POI to export the results of the overall investigation into Excel
[5] uses the RBAC model for rights management
[6] uses bitwise technology to enable authentication
[7] uses custom sections to log