使用java校验ip地址或域名的端口是否开启
1.导入hutool工具的maven依赖

 <dependency><groupId>cn.hutool</groupId><artifactId>hutool-all</artifactId><version>5.8.16</version></dependency>

2.复制一下代码案例直接运行

import cn.hutool.core.net.NetUtil;
import cn.hutool.core.util.StrUtil;import java.net.InetSocketAddress;public class Test {public static void main(String[] args) throws Exception{String host = "192.168.40.202";//可自行修改成自己部署过系统的主机ipint port = 9200;//对应系统服务开放的端口int timeOut = 200;//单位毫秒InetSocketAddress address = createAddress(host, port);//检查远程端口是否开启,true则开启，false则未开启boolean open = NetUtil.isOpen(address, timeOut);System.out.println(open);}/*** 创建 {@link InetSocketAddress}** @param host 域名或IP地址，空表示任意地址* @param port 端口，0表示系统分配临时端口* @return {@link InetSocketAddress}* @since 3.3.0*/public static InetSocketAddress createAddress(String host, int port) {if (StrUtil.isBlank(host)) {return new InetSocketAddress(port);}return new InetSocketAddress(host, port);}
}