Java掃描局域網地址主要通過CMD命令，主要通過Runtime和Process類，由于同一局域網下的IP地址比較多需要通過Java的多線程來掃描端口。
import java.io.BufferedInputStream;
import java.io.IOException;
import java.io.UnsupportedEncodingException;
import java.net.InetAddress;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
public class PingTask{
?? ?
?? ?private String ? address;
?? ?
?? ?public PingTask(String address){
?? ??? ?this.address=address;
?? ?}
?? ?
?? ?public PingResult run() {
?? ??? ?Runtime runtime;
?? ??? ?Process process;
?? ??? ?try {
?? ??? ??? ?runtime=Runtime.getRuntime();
?? ??? ??? ?process=runtime.exec("ping "+address);
?? ??? ??? ?BufferedInputStream inputStream=(BufferedInputStream) process.getInputStream();
?? ??? ??? ?byte [] bt =new byte[1024];
?? ??? ??? ?StringBuffer buffer=new StringBuffer();
?? ??? ??? ?int len=0;
?? ??? ??? ?while((len=inputStream.read(bt, 0,bt.length))!=-1){
?? ??? ??? ??? ?buffer.append(new String(bt, 0, len, "GBK"));
?? ??? ??? ?}
?? ??? ??? ?String regex="(\\d*)?";
?? ??? ??? ?String result="";
?? ??? ??? ?Pattern pattern=Pattern.compile(regex);
?? ??? ??? ?Matcher matcher=pattern.matcher(buffer.toString());
?? ??? ??? ?while(matcher.find()){
?? ??? ??? ??? ?if(!matcher.group().equals("")){
?? ??? ??? ??? ??? ?result=matcher.group();
?? ??? ??? ??? ?}
?? ??? ??? ?}
?? ??? ??? ?
?? ??? ??? ?InetAddress inetAddress=InetAddress.getByName(address);
?? ??? ??? ?String hostname="";
?? ??? ??? ?if(!inetAddress.getHostName().equals(address)){
?? ??? ??? ??? ?hostname=inetAddress.getHostName();
?? ??? ??? ?}
?? ??? ??? ?String mac="";
?? ??? ??? ?process=runtime.exec("arp -a "+address);
?? ??? ??? ?
?? ??? ??? ?BufferedInputStream macinputStream=(BufferedInputStream) process.getInputStream();
?? ??? ??? ?byte [] macbt =new byte[1024];
?? ??? ??? ?StringBuffer macbuffer=new StringBuffer();
?? ??? ??? ?while((len=macinputStream.read(macbt, 0,macbt.length))!=-1){
?? ??? ??? ??? ?macbuffer.append(new String(macbt, 0, len, "GBK"));
?? ??? ??? ?}
?? ??? ??? ?String[] macresult=macbuffer.toString().trim().split("\r\n");
?? ??? ??? ?
?? ??? ??? ?if(!macbuffer.toString().contains("未找到 ARP")){
?? ??? ??? ??? ?mac=macresult[2].substring(20, 40).trim();
?? ??? ??? ?}
?? ??? ??? ?
?? ??? ??? ?PingResult pingResult=new PingResult(address,(100-Integer.parseInt(result))+"%",mac,hostname);
?? ??? ??? ?
?? ??? ?} catch (UnsupportedEncodingException e) {
?? ??? ??? ?e.printStackTrace();
?? ??? ?} catch (IOException e) {
?? ??? ??? ?e.printStackTrace();
?? ??? ?}
?? ??? ?return pingResult;
?? ?}
?? ?
}調用方法：
public static void main(String[] args) {
?? ??? ?PingResult result=new PingTask("123.123.123.123");
?? ??? ?System.out.println(result.toString());
?? ?}PingResult 類
package com.xu.ip;
public class PingResult {
?? ?
?? ?private static String address;//IP地址
?? ?private static String result;//是否可以連接
?? ?private static String physicialaddress;//物理地址
?? ?private static String hostname;//主機名
?? ?
?? ?public String getPhysicialaddress() {
?? ??? ?return physicialaddress;
?? ?}
?? ?public void setPhysicialaddress(String physicialaddress) {
?? ??? ?PingResult.physicialaddress = physicialaddress;
?? ?}
?? ?public String getHostname() {
?? ??? ?return hostname;
?? ?}
?? ?public void setHostname(String hostname) {
?? ??? ?PingResult.hostname = hostname;
?? ?}
?? ?public PingResult(String address, String result) {
?? ??? ?PingResult.address = address;
?? ??? ?PingResult.result = result;
?? ?}
?? ?public PingResult() {
?? ??? ?
?? ?}
?? ?
?? ?public PingResult(String address, String result, String physicialaddress, String hostname) {
?? ??? ?PingResult.address = address;
?? ??? ?PingResult.result = result;
?? ??? ?PingResult.physicialaddress = physicialaddress;
?? ??? ?PingResult.hostname = hostname;
?? ?}
?? ?public String getAddress() {
?? ??? ?return address;
?? ?}
?? ?
?? ?public void setAddress(String address) {
?? ??? ?PingResult.address = address;
?? ?}
?? ?
?? ?public String getResult() {
?? ??? ?return result;
?? ?}
?? ?
?? ?public void setResult(String result) {
?? ??? ?PingResult.result = result;
?? ?}
?? ?@Override
?? ?public String toString() {
?? ??? ?return "PingResult [getClass()=" + getClass() + ", hashCode()=" + hashCode() + ", toString()="
?? ??? ??? ??? ?+ super.toString() + "]";
?? ?}
?? ?
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