How many people does a JavaWeb project need to complete? How long will it take?

Practical development: mvc pattern development, ssh and other frameworks should be skilled. If you are a hotel management system, you can complete the functions in one week (of course, depending on the number of functions, the basic functions can definitely be completed). Not if there are many functions. For example, adding online payment and QR code can't be completed in a week. If you want more than one person, you have to work together. You need one person to do the database, one person to do the page, and two or three people to do the specific business operations. If you want to officially operate for customers, you have to find a good artist. Now it's all cosmetic, and no one can do the function.