import java.io.BufferedReader;

import java.io.BufferedWriter;

import java.io.File;

import java.io.IOException;

import java.io.InputStream;

import java.io.InputStreamReader;

import java.io.OutputStreamWriter;

import java.util.ArrayList;

import java.util.Arrays;

import java.util.Iterator;

import java.util.List;

import java.util.Map;

/**

*在J2SE5.0之前使用Runtime的exec方法執行本地命令.

*在J2Se5.0之後,可以使用ProcessBuilder執行本地命令

*它提供的功能更加豐富,能夠設定設定工作目錄、環境變數等

*本例PorcessBuilder執行Windows作業系統的"ipconfig/all"命令,獲取本機網絡卡的MAC地址

*/

/**關鍵技術剖析

*用本命令名和命令的引數選項構造ProcessBuilder物件,它的start方法執行命令,啟動一個程序,返回一個Process物件

*ProcessBuilder的environment方法獲得執行程序的環境變數

*ProcessBuilder的directory方法切換工作目錄

*Process的getInputStream方法獲得程序的標準輸出流,getErrorStream方法獲得程序的錯誤輸出流

*/

publicclass UsingProcessBuilder {

/**獲取Windows系統下的網絡卡的MAC地址*/

publicstatic List<String> getPhysicalAddress(){

Process p = null;

List<String> address = new ArrayList<String>();

try{

p = new ProcessBuilder("ipconfig","/all").start(); //執行ipconfig/all命令

}catch(IOException e){

return address;

}

byte[] b = newbyte[1024];

int readbytes = -1;

StringBuffer sb = new StringBuffer();

//讀取程序輸出值

//在JAVA IO中,輸入輸出是針對JVM而言,讀寫是針對外部資料來源而言

InputStream in = p.getInputStream();

try{

while((readbytes = in.read(b)) != -1){

sb.append(new String(b,0,readbytes));

}

}catch(IOException e1){

}finally {

try{

in.close();

}catch (IOException e2){

}

}

//以下是分析輸出值,得到物理網絡卡

String rtValue = sb.toString();

int i = rtValue.indexOf("Physical Address. . . . . . . . . :");

while (i > 0){

rtValue = rtValue.substring(i + "Physical Address. . . . . . . . . :".length());

address.add(rtValue.substring(1,18));

i = rtValue.indexOf("Physical Address. . . . . . . . . :");

}

return address;

}

/**執行自定義的一個命令,該命令放在C:/temp下,並且需要兩個環境變數的支援*/

publicstaticboolean executeMyCommand1(){

//建立系統程序建立器

ProcessBuilder pb = new ProcessBuilder("myCommand","myArg1","myArg2");

Map<String, String> env = pb.environment(); //獲得程序的環境

//設定和去除環境變數

env.put("VAR1", "myValue");

env.remove("VAR0");

env.put("VAR2", env.get("VAR1") + ";");

//迭代環境變數,獲取屬性名和屬性值

Iterator it=env.keySet().iterator();

String sysatt = null;

while(it.hasNext())

{

sysatt = (String)it.next();

System.out.println("System Attribute:"+sysatt+"="+env.get(sysatt));

}

pb.directory(new File("C:/temp"));

try{

Process p = pb.start(); //得到程序例項

//等待程序執行完畢

if(p.waitFor() != 0){

//如果程序執行結果不為0,表示程序是錯誤退出的

//獲得程序例項的錯誤輸出

InputStream error = p.getErrorStream();

//do something

}

InputStream sdin = p.getInputStream(); //獲得程序例項的標準輸出

//do something

}catch(IOException e){

}catch(InterruptedException e){

}

returntrue;

}

publicstaticvoid executeMyCommand2(){

ProcessBuilder pb = null;

String sysatt = null;

try

{

//建立一個程序示例

pb = new ProcessBuilder("cmd.exe");

//獲取系統引數並列印顯示

Map<String, String> env = pb.environment();

Iterator it=env.keySet().iterator();

while(it.hasNext())

{

sysatt = (String)it.next();

System.out.println("System Attribute:"+sysatt+"="+env.get(sysatt));

}

//設定工作目錄

pb.directory(new File("d://myDir"));

Process p = pb.start();

//將要執行的Windows命令寫入

BufferedWriter bw=new BufferedWriter(new OutputStreamWriter(p.getOutputStream()));

//'/r/n'是必須寫入的

bw.write("test.bat /r/n");

bw.write("ping -t www.yahoo.com.cn /r/n");

//flush()方法是必須呼叫的

bw.flush();

//將執行結果列印顯示

InputStream is = p.getInputStream();

            InputStreamReader isr = new InputStreamReader(is, "GBK");

BufferedReader br = new BufferedReader(isr);

String line;

while ((line = br.readLine()) != null)

{

System.out.println(line);

}

}

catch (Exception e)

{

e.printStackTrace();

}

}

publicstaticvoid main(String[] args){

List<String> address = UsingProcessBuilder.getPhysicalAddress();

for(String add : address){

System.out.printf("物理網絡卡地址: %s%n",add);

}

executeMyCommand1();

executeMyCommand2();

}

}