java/w9/CrawlCommand.java

package com.example.datacollect.command;

import com.example.datacollect.model.Article;
import com.example.datacollect.view.ConsoleView;
import java.util.List;

public class CrawlCommand implements Command {
    private final ConsoleView view;

    public CrawlCommand(ConsoleView view) {
        this.view = view;
    }

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

    @Override
    public void execute(String[] args, List<Article> articles) {
        if (args.length < 2) {
            view.printError("Usage: crawl <url>");
            return;
        }
        String urlStr = args[1];
        
        // URL 格式验证
        try {
            new java.net.URL(urlStr).toURI();
        } catch (Exception e) {
            view.printError("Invalid URL format: " + urlStr);
            return;
        }
        
        view.printInfo("Stub: would crawl " + urlStr);
    }
}