Multiple sorting for file generated from beanshell scripting

Question

I am generating the .txt file from beanshell scripting. Now I am having problem for sorting. If anyone can give any idea that will be great help. The file looks like:

UserId FirstName LastName  Status     roleId
2025    A           B       Active     3
2021    C           D       InActive   2
2036    E           F       Active     1
3012    G           H       Active     2
5012    I           J       InActive   1

Sorting should be done by while writing file by Status in ascending order, then by roleId in ascending order, then by UserId in ascending order.

Sorting should have nothing to do with the text file. You should be sorting the list _before_ generating the text file. I'm assuming you're using a `List`, so you can use `Collections.sort(list, comparator)`, where `comparator` is a custom comparator that controls how the items are intended to be sorted by defining what makes one item "bigger" or "smaller" than another item. See [here](https://stackoverflow.com/questions/5245093/how-do-i-use-comparator-to-define-a-custom-sort-order) for more info. — Jordan, Feb 04 '20 at 21:33

score 0 · Answer 1 · answered Feb 04 '20 at 21:40

Assuming


public class User {

    private Integer userId;
    private String firstName, lastName;
    public enum Status{
        ACTIVE, INACTIVE;
    }
    private Status status;
    private Integer roleId;

     // getter and setter
}

You can use a comparator like this:


public class UserComparator implements Comparator<User> {

    @Override
    public int compare(User o1, User o2) {

    @Override
    public int compare(User o1, User o2) {
        int bystatus = o1.getStatus().compareTo(o2.getStatus());
        if (bystatus != 0) {
            return bystatus;
        }
        int byid = o1.getUserId().compareTo(o2.getUserId());
        if (byid != 0) {
            return byid;
        }
        return o1.getRoleId().compareTo(o2.getRoleId());
    }

}

Finally:

Collections.sort(list, comparator);

Multiple sorting for file generated from beanshell scripting

1 Answers1