java/w10/AnalyzeCommand.java

package com.example.datacollect.command;

import com.example.datacollect.model.Article;
import com.example.datacollect.repository.ArticleRepository;
import com.example.datacollect.strategy.CrawlStrategy;
import com.example.datacollect.strategy.StrategyFactory;
import com.example.datacollect.view.ConsoleView;
import org.jsoup.Jsoup;
import org.jsoup.nodes.Document;

import java.util.List;

public class AnalyzeCommand implements Command {
    private final ConsoleView view;
    private final StrategyFactory strategyFactory;

    public AnalyzeCommand(ConsoleView view, StrategyFactory strategyFactory) {
        this.view = view;
        this.strategyFactory = strategyFactory;
    }

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

    @Override
    public void execute(String[] args, ArticleRepository repository) {
        if (args.length < 2) {
            view.printError("Usage: analyze <url>");
            return;
        }
        String url = args[1];

        CrawlStrategy strategy = strategyFactory.getStrategy(url);
        if (strategy == null) {
            view.printError("No strategy found for: " + url);
            return;
        }

        try {
            view.printInfo("Analyzing: " + url);
            Document doc = Jsoup.connect(url).get();
            List<Article> articles = strategy.parse(url, doc);

            int articleCount = articles.size();
            int totalTitleLength = 0;
            int maxTitleLength = 0;
            int minTitleLength = Integer.MAX_VALUE;

            for (Article article : articles) {
                int len = article.getTitle().length();
                totalTitleLength += len;
                maxTitleLength = Math.max(maxTitleLength, len);
                minTitleLength = Math.min(minTitleLength, len);
            }

            view.printSuccess("=== 分析结果 ===");
            view.printInfo("文章数量: " + articleCount);
            if (articleCount > 0) {
                view.printInfo("标题总长度: " + totalTitleLength);
                view.printInfo("平均标题长度: " + String.format("%.2f", (double) totalTitleLength / articleCount));
                view.printInfo("最长标题: " + maxTitleLength + " 字符");
                view.printInfo("最短标题: " + minTitleLength + " 字符");
            }

        } catch (Exception e) {
            view.printError("Failed to analyze: " + e.getMessage());
        }
    }
}