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J2SE5.0新特性之ProcessBuilder


  这个例子使用了J2SE5.0的ProcessBuilder类执行外部的程序,相对于 Runtime.exec ,它更方便,可以设置环境变量等。这里使用它在windows下读取物理网卡的地址
  
  package com.kuaff.jdk5package;
  
  import java.io.IOException;
  import java.io.InputStream;
  import java.util.ArrayList;
  import java.util.List;
  
  public class ProcessBuilderShow
  {
  public static List getPhysicalAddress()
  {
  Process p = null;
  //物理网卡列表
  List address = new ArrayList();
  
  try
  {
  //执行ipconfig /all命令
  p = new ProcessBuilder("ipconfig", "/all").start();
  }
  catch (IOException e)
  {
  return address;
  }
  byte[] b = new byte[1024];
  StringBuffer sb = new StringBuffer();
  //读取进程输出值
  InputStream in = p.getInputStream();
  try
  {
  while (in.read(b)>0)
  {
  sb.append(new String(b));
  }
  }
  catch (IOException e1)
  {
  }
  finally
  {
  try
  {
  in.close();
  }
  catch (IOException e2)
  {
  }
  }
  //以下分析输出值,得到物理网卡
  String rtValue = sb.substring(0);
  int i = rtValue.indexOf("Physical Address. . . . . . . . . :");
  while(i>0)
  {
  rtValue = rtValue.substring(i + "Physical Address. . . . . . . . . :".length());
  address.add(rtValue.substring(0,18));
  i = rtValue.indexOf("Physical Address. . . . . . . . . :");
  }
  return address;
  }
  public static void main(String[] args)
  {
  List address = ProcessBuilderShow.getPhysicalAddress();
  for(String add:address)
  {
  System.out.printf("物理网卡地址:%s%n", add);
  }
  }
  }
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