java/W9/CrawlCommand.java

package com.example.datacollect.command;

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

/**
 * 爬取命令（带 URL 验证）
 */
public class CrawlCommand implements Command {
    private final ConsoleView view;

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

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

    /**
     * 获取命令别名
     */
    public String[] getAliases() {
        return new String[]{"c"};
    }

    @Override
    public void execute(String[] args, List<Article> articles) {
        if (args.length < 2) {
            view.printError("Usage: crawl <url> 或 c <url>");
            return;
        }

        String url = args[1];
        
        // URL 格式验证
        if (!UrlValidator.isValid(url)) {
            view.printError("URL 格式错误：" + UrlValidator.getValidationError(url));
            view.printInfo("示例：crawl https://www.example.com");
            return;
        }
        
        view.printInfo("正在爬取：" + url);
        // TODO: 实现实际爬取逻辑
    }
}