Convert eclipse dynamic web project to maven project

How to do this The elder brother wrote very clearly, but he didn't know where to put the files

https://blog.csdn.net/opera95/article/details/78181719?ops_request_misc=%257B%2522request%255Fid%2522%253A%2522158643535419724848307401%2522%252C%2522scm%2522%253A%252220140713.130102334..%2522%257D&request_id=158643535419724848307401&biz_id=0&utm_source=distribute.pc_search_result.none-task-blog-soetl_so_first_rank_v2_rank_v25-6

Where to put the file, this brother wrote very clearly

https://blog.csdn.net/ronghuanye/article/details/72821831?ops_request_misc=%257B%2522request%255Fid%2522%253A%2522158643535419724848307401%2522%252C%2522scm%2522%253A%252220140713.130102334..%2522%257D&request_id=158643535419724848307401&biz_id=0&utm_source=distribute.pc_search_result.none-task-blog-soetl_so_first_rank_v2_rank_v25-15