First: The development language java is the focus, and Python is the supplement
Second: The foundation of web design is better, html5, css3, JavaScript (with basic knowledge of java, it is faster to learn, although it is a bit different from java)
Third: web development framework flask (python library) + echart (chart visualization library)
Fourth: data analysis: master Python's scrapy crawler (requires knowledge of html5)
Fifth: Knowledge of the linux operating system (this system is required for the construction of a big data platform)