在加入GE之前没怎么写过JAVA程序, 其实JAVA挺好的, API多, 而且跨平台, 并且速度也不慢 (已经优化很多了).
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最近用到了 iNetAddress 这个库, 写了一命令行工具, 可以简易根据域名查询 IP 地址.
代码也在 https://github.com/DoctorLai/DNSLookup
import java.net.InetAddress;
import java.net.UnknownHostException;
public class DNSLookup {
// https://helloacm.com/the-dns-lookup-tool-in-java-inetaddress/
public static void main(String args[]) {
try {
InetAddress host;
if (args.length == 0) {
host = InetAddress.getLocalHost();
displayHost(host);
} else {
for (int i = 0; i < args.length; ++ i) {
host = InetAddress.getByName(args[i]);
displayHost(host);
}
}
} catch (UnknownHostException e) {
e.printStackTrace();
}
}
private static void displayHost(InetAddress host) {
System.out.println("Host:'" + host.getHostName()
+ "' has address: " + host.getHostAddress());
}
}
通过 javac DNSLookup.java 命令编译成 DNSLookup.class (或者下载 提前编译好的). 然后就可以通过以下例子来查询一个或者多个域名了
# java DNSLookup
Host:'HP-PC' has address: 192.168.0.102
HP@HP-PC D:\
# java DNSLookup localhost
Host:'localhost' has address: 127.0.0.1
HP@HP-PC D:\
# java DNSLookup localhost www.google.com
Host:'localhost' has address: 127.0.0.1
Host:'www.google.com' has address: 216.58.201.36
简单好用.
英文: The DNS Lookup Tool in Java (InetAddress)
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