Convert some data from CSV to MongoDB

Description of Project There are some data need to be processed, which is .csv format. One is named Single, and the other kind is Multi. Both kinds are made up of several .csv files and separated into the belonged file. Besides, the data structure of the same kind stays no different. Single Only covers enterprises’ data. Every single line per enterprise. There are more than one values exist in the item “Industry”, cause some enterprises involve multiple industries. In case more examples like “Industry” listed above, please define all the keys as arrays except some unique keys. Multi The coverage is not only enterprises’ data but also employees’ information. One piece of enterprise data may cover several lines. Employees’ information should be formed as another set. As a result, there should be two sets, one for enterprises, and one for employees. Each enterprise owns the one and only ID number. While converting data from .csv of Multi, use ID numbers to verify whether there is the existence already(from Single), if does, insert the information differ from Single parts; if not, create a new object of an enterprise. General Rules 1. Each object stands for an enterprise; 2. The whole program and the source code is attached together with delivered result; 3. There should be an interface through which we can choose whether import Single folder or Multi folder; 4. The program is required to support process all the .csv files from one folder. 5. For more details and related Key name rules would be sent to you later on