Java捕获SocketException与重连策略解析

try (Socket socket = new Socket("example.com", 80);
     BufferedReader in = new BufferedReader(new InputStreamReader(socket.getInputStream()));
     PrintWriter out = new PrintWriter(socket.getOutputStream(), true)) {

    // 发送请求
    out.println("GET / HTTP/1.1");
    out.println("Host: example.com");
    out.println();
    
    // 读取响应
    String line;
    while ((line = in.readLine()) != null) {
        System.out.println(line);
    }

} catch (SocketException e) {
    System.err.println("网络连接异常: " + e.getMessage());
    // 触发重连逻辑
    handleReconnect();
} catch (IOException e) {
    System.err.println("IO异常: " + e.getMessage());
}

private static final int MAX_RETRIES = 5;
private static final int BASE_DELAY_MS = 1000;

public void connectWithRetry() {
    int retries = 0;
    int delay = BASE_DELAY_MS;

    while (retries <= MAX_RETRIES) {
        try (Socket socket = new Socket()) {
            socket.connect(new InetSocketAddress("example.com", 80), 5000);
            // 成功连接，启动数据交互
            startCommunication(socket);
            return; // 正常退出

        } catch (SocketException e) {
            System.err.println("Socket异常: " + e.getMessage());
            if (retries >= MAX_RETRIES) break;

            try {
                Thread.sleep(delay);
            } catch (InterruptedException ie) {
                Thread.currentThread().interrupt();
                return;
            }
            delay *= 2; // 指数增长
            retries++;
        } catch (IOException e) {
            System.err.println("连接失败: " + e.getMessage());
            break; // 其他IO异常不重试
        }
    }
    System.err.println("重连失败次数过多，放弃连接。");
}