一个域名绑定多个ip，模拟浏览器的访问，自定切换到可访问ip

最新推荐文章于 2025-08-08 11:30:05 发布

原创最新推荐文章于 2025-08-08 11:30:05 发布 · 911 阅读

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本文通过Java代码示例展示了如何获取指定域名的所有IP地址，并针对每个IP地址建立HTTP代理连接进行测试，验证其是否可以成功获取网页内容。该过程涉及DNS解析、字节转换、异常处理等多个步骤。

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 InetAddress[] inetAddress =  InetAddress.getAllByName("blog.test.cn");

        for(InetAddress inetAddress1: inetAddress){
            {
                URL url = new URL("http://blog.test.cn");

                String[] ips = inetAddress1.getHostAddress().split("\\.");
                byte b[] = new byte[4];
                b[0] = new Integer(ips[0]).byteValue();
                b[1] = new Integer(ips[1]).byteValue();
                b[2] = new Integer(ips[2]).byteValue();
                b[3] = new Integer(ips[3]).byteValue();

                Proxy proxy = new Proxy(Proxy.Type.HTTP, new InetSocketAddress(InetAddress.getByAddress(b), 80));

                URLConnection connection = url.openConnection(proxy);
                connection.setConnectTimeout(3000);

                try{
                    System.out.println( IOUtils.toString( connection.getInputStream()));
                    System.out.println("host :" + inetAddress1.getHostAddress() + " is OK ");
                    return;
                }catch (Exception e){
                    e.printStackTrace();
                    System.out.println("host :" + inetAddress1.getHostAddress() + " is down ");
                }

            }

        }

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