java获取局域网mac_最靠谱的JAVA局域网内通过IP地址获取MAC地址（本人亲测）
局域网内通过IP地址获取MAC地址(本人亲测)window环境下，其他环境未测试
1.[代码][Java]代码
package com.example;
import java.io.InputStream;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
public class Cmd {
/**
* 执行单条指令
* @param cmd 命令
* @return 执行结果
* @throws Exception
*/
public static String command(String cmd) throws Exception{
Process process = Runtime.getRuntime().exec(cmd);
process.waitFor();
InputStream in = process.getInputStream();
StringBuilder result = new StringBuilder();
byte[] data = new byte[256];
while(in.read(data) != -1){
String encoding = System.getProperty("sun.jnu.encoding");
result.append(new String(data,encoding));
}
return result.toString();
}
/**
* 获取mac地址
* @param ip
* @return
* @throws Exception
*/
public static String getMacAddress(String ip) throws Exception{
String result = command("ping "+ip+" -n 2");
if(result.contains("TTL")){
result = command("arp -a "+ip);
}
String regExp = "([0-9A-Fa-f]{2})([-:][0-9A-Fa-f]{2}){5}";
Pattern pattern = Pattern.compile(regExp);
Matcher matcher = pattern.matcher(result);
StringBuilder mac = new StringBuilder();
while (matcher.find()) {
String temp = matcher.group();
mac.append(temp);
}
return mac.toString();
}
public static void main(String[] args) throws Exception {
System.out.println(System.currentTimeMillis());
System.out.println(getMacAddress("192.168.1.113"));
System.out.println(System.currentTimeMillis());
//System.out.println(command("arp -a 192.168.1.103"));
//System.out.println(System.getProperties());
}
}