InetAddress ip = InetAddress.getByName("www.baidu.com"); System.out.println("是否可达: "+ip.isReachable(2000)); System.out.println(ip.getHostAddress()); InetAddress local = InetAddress.getByAddress(new byte[]{127,0,0,1}); System.out.println("本机是否可达:" + local.isReachable(5000)); //获取IP的全限定域名 System.out.println(local.getCanonicalHostName()); //当涉及到普通字符串与非西欧字符串的相关转换时,可以用URLEncoder和URLDecoder String ChineseUrl = URLEncoder.encode("青岛","GBK"); System.out.println(ChineseUrl); System.out.println(URLDecoder.decode(ChineseUrl,"GBK"));