java/w10/HistoryCommand2.java

import java.util.ArrayList;
import java.util.List;

public class HistoryCommand2 implements Command2 {
    private final List<String> commandHistory = new ArrayList<>();

    @Override
    public String getName() {
        return "history";
    }

    @Override
    public void execute(String[] args, List<Article2> articles) {
        if (commandHistory.isEmpty()) {
            System.out.println("暂无历史记录");
            return;
        }
        System.out.println("===== 命令历史 =====");
        for (int i = 0; i < commandHistory.size(); i++) {
            System.out.println((i+1) + ". " + commandHistory.get(i));
        }
    }

    public void addCommand(String cmd) {
        commandHistory.add(cmd);
    }
}