通过dns解析获取域名的ip地址
星期二, 2012-12-04 | Author: Lee | JAVA-and-J2EE | 9,002 views
可以通过域名获取域名解析的ip地址,java版本,通过java的本地dns解析,如果本地设置了host的解析地址将会和真实ip地址有出入:
获取www.qq.com的ip地址如下:
ipv4:222.73.78.166
ipv4:222.73.78.171
ipv4:222.73.78.181
ipv4:101.226.42.62
ipv4:101.226.49.101
ipv4:115.236.139.153
ipv4:180.153.210.43
code如下:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 | package com.i5a6.leeyz.ip; import java.net.Inet4Address; import java.net.Inet6Address; import java.net.InetAddress; import java.util.ArrayList; import java.util.HashMap; import java.util.List; import java.util.Map; public class TestGetIp { /** * @param args */ public static void main(String[] args) { Map<String, List<String>> map = getHostIp("www.qq.com"); if (map == null) { System.out.println("local dns is error!"); return; } if (map.containsKey("ipv4")) { for (String ip : map.get("ipv4")) { System.out.println("ipv4:" + ip); } } if (map.containsKey("ipv6")) { for (String ip : map.get("ipv6")) { System.out.println("ipv6:" + ip); } } } //java 通过dns解析获取域名的主机ip地址 public static Map<String, List<String>> getHostIp(String host) { Map<String, List<String>> map = new HashMap<String, List<String>>(); try { InetAddress[] ipArray = InetAddress.getAllByName(host); for (InetAddress ip : ipArray) { if (ip instanceof Inet4Address) { if (!(map.containsKey("ipv4"))) { List<String> list = new ArrayList<String>(); map.put("ipv4", list); } map.get("ipv4").add(ip.getHostAddress()); } else if (ip instanceof Inet6Address) { if (!(map.containsKey("ipv6"))) { List<String> list = new ArrayList<String>(); map.put("ipv6", list); } map.get("ipv6").add(ip.getHostAddress()); } } } catch (Exception e) { return null; } return map; } } |
文章作者: Lee
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