J2SE5.0的ProcessBuilder特性
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2019-06-14

J2SE5.0的ProcessBuilder特性

J2SE5.0的ProcessBuilder特性

这个例子利用了J2SE5.0的ProcessBuilder类执行外部的措施,相对付 Runtime.exec ,它更利便,可以配置情况变量等。这里利用它在windows下读取物理网卡的地点

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<String> getPhysicalAddress()
 {
  Process p = null;
  //物理网卡列表
  List<String> address = new ArrayList<String>();
  try
  {
   //执行ipconfig /all呼吁
   p = new ProcessBuilder("ipconfig", "/all").start();
  }
  catch (IOException e)
  {
   return address;
  }
  byte[] b = new byte[1024];
  StringBuffer sb = new StringBuffer();
  //读取历程输出值
  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)
   {
   }
  }
  //以下阐明输出值,获得物理网卡
  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<String> address = ProcessBuilderShow.getPhysicalAddress();
  for(String add:address)
  {
   System.out.printf("物理网卡地点:%s%n", add);
  }
 }
}

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