在mySQL数据库中存储ArrayList对象数据

Question

I am creating a web application that has a User object and each User object has an ArrayList of objects (Food) that need to be stored into a table in a mySQL database. I want to store the entire ArrayList into a single column. Would it be better to store it as a Json? Or should I just create a table for each User that stores the individual items of the ArrayList? The only problem I have is that the data would edited quite frequently.

EDIT: I have tables for both Users and Food. The idea is that Users add from the Foods from the Food table to their ArrayList and then I want to store that ArrayList in something.

public class User{
  private int id;
  private String username;
  private List<Food> FoodList = new ArrayList<Food>();
}

public class Food{
  private int id;
  private String name;
  private double protein;
  private int calories;
  ...
}

Answer 1

1. As @ayrton mentions, creating (at least) two tables is a good idea (one for Users and one for Foods).
2. Definitely don't create a table per User
3. As @NeplatnyUdaj mentioned, a join table (where you map Foods to Users) might be warranted (or it could be overkill, depending on your needs).
4. Given the details you've described, JSON is almost certainly not the best approach (this isn't true in all situations, but if you were in such a situation, I'd probably suggest you consider a different type of database).

(Welcome to SO, btw!)