首先要说的是：可以支持外网机器的mac地址获取。 以前弄了一个只能访问局域网。 有防火墙就访问不了， 但是这个不用担心了。 测试了百度的ip，已经可以获得mac地址
测试效果图：
java通过ip获取mac地址-封ip封mac地址
package com.yjf.test;
import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
/**
* 获取MAC地址
* @author
* 2011-12
*/
public class GetMacAddress {
public static String callCmd(String[] cmd) {
String result = "";
String line = "";
try {
Process proc = Runtime.getRuntime().exec(cmd);
InputStreamReader is = new InputStreamReader(proc.getInputStream());
BufferedReader br = new BufferedReader (is);
while ((line = br.readLine ()) != null) {
result += line;
}
}
catch(Exception e) {
e.printStackTrace();
}
return result;
}
来源地址：http://yijianfengvip.blog.163.com/blog/static/175273432201212295830661/
/**
*
* @param cmd 第一个命令
* @param another 第二个命令
* @return 第二个命令的执行结果
*/
public static String callCmd(String[] cmd,String[] another) {
String result = "";
String line = "";
try {
Runtime rt = Runtime.getRuntime();
Process proc = rt.exec(cmd);
proc.waitFor(); //已经执行完第一个命令，准备执行第二个命令
proc = rt.exec(another);
InputStreamReader is = new InputStreamReader(proc.getInputStream());
BufferedReader br = new BufferedReader (is);
while ((line = br.readLine ()) != null) {
result += line;
}
}
catch(Exception e) {
e.printStackTrace();
}
return result;
}
/**
*
* @param ip 目标ip,一般在局域网内
* @param sourceString 命令处理的结果字符串
* @param macSeparator mac分隔符号
* @return mac地址，用上面的分隔符号表示
*/
public static String filterMacAddress(final String ip, final String sourceString,final String macSeparator) {
String result = "";
String regExp = "((([0-9,A-F,a-f]{1,2}" + macSeparator + "){1,5})[0-9,A-F,a-f]{1,2})";
Pattern pattern = Pattern.compile(regExp);
Matcher matcher = pattern.matcher(sourceString);
while(matcher.find()){
result = matcher.group(1);
if(sourceString.indexOf(ip) <= sourceString.lastIndexOf(matcher.group(1))) {
break; //如果有多个IP,只匹配本IP对应的Mac.
}
}
return result;
}
/**
*
* @param ip 目标ip
* @return Mac Address
*
*/
public static String getMacInWindows(final String ip){
String result = "";
String[] cmd = {
"cmd",
"/c",
"ping " + ip
};
String[] another = {
"cmd",
"/c",
"arp -a"
};
String cmdResult = callCmd(cmd,another);
result = filterMacAddress(ip,cmdResult,"-");
return result;
}
来源博客：http://yijianfengvip.blog.163.com/blog/static/175273432201212295830661/
/**
*
* @param ip 目标ip
* @return Mac Address
*
*/
public static String getMacInLinux(final String ip){
String result = "";
String[] cmd = {
"/bin/sh",
"-c",
"ping " + ip + " -c 2 && arp -a"
};
String cmdResult = callCmd(cmd);
result = filterMacAddress(ip,cmdResult,":");
return result;
}
/**
* 获取MAC地址
* @return 返回MAC地址
*/
public static String getMacAddress(String ip){
String macAddress = "";
macAddress = getMacInWindows(ip).trim();
if(macAddress==null||"".equals(macAddress)){
macAddress = getMacInLinux(ip).trim();
}
return macAddress;
}
java通过ip获取mac地址-封ip封mac地址