java/project/view/CrawlerView.java

package com.crawler.view;

import com.crawler.model.CrawlerData;

import java.util.List;

public class CrawlerView {
    public void showStartMessage(String crawlerName) {
        System.out.println("========================================");
        System.out.println("开始运行爬虫: " + crawlerName);
        System.out.println("========================================");
    }

    public void showProgress(int current, int total) {
        System.out.printf("进度: %d/%d%n", current, total);
    }

    public void showData(List<CrawlerData> dataList) {
        System.out.println("========================================");
        System.out.println("爬取结果:");
        System.out.println("========================================");
        
        if (dataList == null || dataList.isEmpty()) {
            System.out.println("未获取到数据");
            return;
        }

        int index = 1;
        for (CrawlerData data : dataList) {
            System.out.println("[" + index++ + "]");
            System.out.println("标题: " + data.getTitle());
            System.out.println("链接: " + data.getUrl());
            System.out.println("来源: " + data.getSource());
            if (data.getPublishDate() != null && !data.getPublishDate().isEmpty()) {
                System.out.println("发布日期: " + data.getPublishDate());
            }
            if (data.getContent() != null && !data.getContent().isEmpty()) {
                String preview = data.getContent().length() > 100 
                    ? data.getContent().substring(0, 100) + "..." 
                    : data.getContent();
                System.out.println("内容预览: " + preview);
            }
            System.out.println("----------------------------------------");
        }
    }

    public void showSuccessMessage(int count) {
        System.out.println("========================================");
        System.out.println("爬虫运行完成，共获取 " + count + " 条数据");
        System.out.println("========================================");
    }

    public void showErrorMessage(String error) {
        System.err.println("========================================");
        System.err.println("错误: " + error);
        System.err.println("========================================");
    }
    
    public void showCacheSuccess(String filePath, int recordCount, long fileSize) {
        System.out.println("========================================");
        System.out.println("缓存操作结果:");
        System.out.println("========================================");
        System.out.println("状态: 成功");
        System.out.println("信息: 保存成功");
        System.out.println("路径: " + filePath);
        System.out.println("记录数: " + recordCount);
        System.out.println("文件大小: " + formatFileSize(fileSize));
        System.out.println("========================================");
    }
    
    private String formatFileSize(long size) {
        if (size < 1024) {
            return size + " B";
        } else if (size < 1024 * 1024) {
            return String.format("%.2f KB", size / 1024.0);
        } else {
            return String.format("%.2f MB", size / (1024.0 * 1024));
        }
    }
}