java/w11/ExceptionDemo.java

import java.util.concurrent.atomic.AtomicInteger;

public class ExceptionDemo {
    public static void main(String[] args) {
        System.out.println("===== 测试 URL 校验测试 =====");
        testUrlValidation();
        
        System.out.println("\n===== 测试重试机制测试 =====");
        testRetryMechanism();
    }
    
    private static void testUrlValidation() {
        String[] testUrls = {
            "https://www.example.com",
            "invalid-url",
            null
        };
        
        for (String url : testUrls) {
            try {
                System.out.println("正在校验 URL: " + url);
                UrlValidator.validateUrl(url);
                System.out.println("URL 格式有效！");
            } catch (UrlFormatException e) {
                System.err.println("错误: " + e.getMessage());
                System.err.println("无效的 URL: " + e.getInvalidUrl());
            }
        }
    }
    
    private static void testRetryMechanism() {
        // 模拟一个会失败几次的操作
        AtomicInteger attemptCounter = new AtomicInteger(0);
        
        try {
            String result = RetryUtils.executeWithRetry(() -> {
                int currentAttempt = attemptCounter.incrementAndGet();
                System.out.println("执行操作... (尝试次数: " + currentAttempt + ")");
                
                // 模拟前3次失败，第4次成功
                if (currentAttempt < 4) {
                    throw new RuntimeException("模拟失败");
                }
                
                return "操作成功完成！";
            });
            
            System.out.println("结果: " + result);
        } catch (NetworkException e) {
            System.err.println("错误: " + e.getMessage());
            e.printStackTrace();
        }
    }
}