I have a master's degree in software engineering, and I am writing my graduation thesis. I want to write a J2EE-based system. What system can I write to distinguish between undergraduate and master, technically? I feel that the core of a system is the realization of its business logic. Secondly, some cutting-edge technologies can be used in the implementation process, such as distributed implementation of Web services, Lucene intelligent retrieval, Hadoop big data processing, etc ... Of course, we should choose them reasonably according to our own business needs, and some JS frameworks, Jquery and ajax can be used in the front end. ...