新建 文本文档.txt

在linux下得到网络流量

得到当前网络流量
import java.io.*;
public class getlinuxnetstream{
  public long Linux_Traffic(String cmdline){
     long result=0;
     try{
       String line;
       Process p=Runtime.getRuntime().exec(cmdline);
       BufferedReader input=new BufferedReader(new InputStreamReader(p.getInputStream()));
       int i=0;
       while((line=input.readLine())!=null){
           if((line.indexOf("total packets received")!=-1)||(line.indexOf("requests sent out ")!=-1)){
              line=line.trim();
              int nSpaceIndex=line.indexOf(" ");
              result+=Long.parseLong(line.substring(0,nSpaceIndex));
           }
           i++;
       }//while
     input.close();
     }//try
     catch(Exception err){return -1;}
  return result;
  }
  public static  void main(String args[]){
    getlinuxnetstream mm=new getlinuxnetstream();
    long tt=0;
    tt=mm.Linux_Traffic("netstat  -sw");
    System.out.println(tt);
  }
}