java/w10/AnalyzeCommand.java

import java.util.List;

interface ParseStrategy {
    boolean supports(String url);
    int analyze(String url);
}

class BlogStrategy implements ParseStrategy {
    @Override
    public boolean supports(String url) {
        return url.contains("blog");
    }

    @Override
    public int analyze(String url) {
        return 1000;
    }
}

class NewsStrategy implements ParseStrategy {
    @Override
    public boolean supports(String url) {
        return url.contains("news");
    }

    @Override
    public int analyze(String url) {
        return 2000;
    }
}

public class AnalyzeCommand {
    private final List<ParseStrategy> strategies;

    public AnalyzeCommand(List<ParseStrategy> strategies) {
        this.strategies = strategies;
    }

    public void execute(String url) {
        if (url == null || url.isBlank()) {
            System.out.println("错误：URL不能为空");
            return;
        }

        ParseStrategy matchedStrategy = null;
        for (ParseStrategy strategy : strategies) {
            if (strategy.supports(url)) {
                matchedStrategy = strategy;
                break;
            }
        }

        if (matchedStrategy == null) {
            System.out.println("错误：无支持该URL的解析策略");
            return;
        }

        int stats = matchedStrategy.analyze(url);
        System.out.println("=== 分析结果 ===");
        System.out.println("URL: " + url);
        System.out.println("统计信息: " + stats);
    }

    public static void main(String[] args) {
        List<ParseStrategy> strategies = List.of(new BlogStrategy(), new NewsStrategy());
        AnalyzeCommand cmd = new AnalyzeCommand(strategies);
        cmd.execute("http://example.com/blog/123");
    }
}