netstatus.java

这是一个在linux环境下

package fr.umlv.projet.procfs;

import java.io.File;
import java.io.FileNotFoundException;
import java.util.Scanner;

import fr.umlv.projet.main.MainTest;
/**
 * This class is to read the real time states of Net.
 * @author MA Xiao Jun & HUANG Wei
 *
 */
public class NetStatus {

	private static float oldRecieve;
	private static float newRecieve;
	private static float oldTransmit;
	private static float newTransmit;
	private static float recieveSpeed;
	private static float transmitSpeed;
	private static int recieveTotal;
	private static int transmitTotal;
	private static int packRecieve;
	private static int packTransmit;
	private static String MAC;
	
	/**
	 * load the states of Net from file "/proc/net/dev"
	 */
	public static void loadNetStatus(){
        int packRec = 0;
        int packTran = 0;
        try {
            Scanner sc = new Scanner(new File("/proc/net/dev"));
            while(sc.hasNext ()){
                String s = sc.next();
                if(s.contains("eth")){
                    if(s.length()>8){
                        newRecieve += Float.parseFloat(s.substring(s.length()-8, s.length()));
                        packRec += Integer.parseInt(sc.next());
                        packRecieve = packRec;
                        for(int i=0;i<5;i++ ){
                            sc.next ();
                        }
                        String str = sc.next();
                        if(str.equals("0")){
                        newTransmit += Float.parseFloat(sc.next());
                        packTran += Integer.parseInt(sc.next());
                        packTransmit = packTran;
                        }
                        else{
                            newTransmit += Float.parseFloat(str.substring(s.length ()-8));
                            packTran += Integer.parseInt(sc.next());
                            packTransmit = packTran;
                        }
                    }
                    else{
                        newRecieve += Float.parseFloat(sc.next());
                        packRec += Integer.parseInt(sc.next());
                        packRecieve = packRec;
                        for(int i=0;i<6;i++ ){
                            sc.next();
                        }
                        newTransmit += Float.parseFloat(sc.next());
                        packTran += Integer.parseInt(sc.next());
                        packTransmit = packTran;
                    }
                }
            }
            calculRecieve(oldRecieve , newRecieve );
            calculTransmit(oldTransmit , newTransmit);
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        }
    }	
	
	/**
	 * caculate value of data recieved.
	 * @param oldRecieve the datas recieved before.
	 * @param newRecieve the datas recieved real time.
	 */
	public static void calculRecieve(float oldRecieve,float newRecieve){
	//	System.out.println("oldRecieve "+oldRecieve+"  newRecieve "+newRecieve);
		if(oldRecieve == 0){
			NetStatus.oldRecieve = newRecieve;
			NetStatus.newRecieve = 0;
		}
		else{
		float value = (newRecieve - oldRecieve)/(1024*(MainTest.getTime()/1000));
		NetStatus.oldRecieve = newRecieve;
		recieveTotal = (int)newRecieve;
		NetStatus.newRecieve = 0;
		recieveSpeed = value;}
	}

	/**
	 * caculate value of data Transmited.
	 * @param oldTransmit the datas Transmited before.
	 * @param newTransmit the datas Transmited real time.
	 */
	public static void calculTransmit(float oldTransmit , float newTransmit){
		if(oldTransmit == 0){
			NetStatus.oldTransmit = newTransmit ;
			NetStatus.newTransmit = 0;
		}
		else{
			float value = (newTransmit - oldTransmit)/(1024*(MainTest.getTime()/1000));
			NetStatus.oldTransmit = newTransmit ;
			transmitTotal = (int)newTransmit;
			NetStatus.newTransmit = 0;
			transmitSpeed = value;
		}
	}
	
	/**
	 * load the address IP of computer.
	 * @return address IP
	 */
	public static String loadIP(){
		String s = "";
		try {
			Scanner sc = new Scanner(new File("/proc/net/arp"));
			for(int i = 0 ;i<9 ; i++ )
				if(sc.hasNext()){
					sc.next();
				}
			if(sc.hasNext())
				s = sc.next();
			return s;
		} catch (FileNotFoundException e) {
			e.printStackTrace();
		}
		return s;
	}
	
	/**
	 * load the address MAC of computer.
	 * @return address MAC
	 */
	public static String loadMAC(){
		String s = "";
		try {
			Scanner sc = new Scanner(new File("/proc/net/arp"));
			for(int i = 0 ;i<12 ; i++ )
				if(sc.hasNext()){
					sc.next();
				}
			if(sc.hasNext())
				s = sc.next();
			return s;
		} catch (FileNotFoundException e) {
			e.printStackTrace();
		}
		return s;
	}
	
	

	/**
	 * Return the speed of recieve data.
	 * @return value of speed.
	 */
	public static float getRecieveSpeed() {
		return changeFloatSize(recieveSpeed,1);
	}
	/**
	 * the speed of transmit data.
	 * @return value of speed.
	 */
	public static float getTransmitSpeed() {
		return changeFloatSize(transmitSpeed,1);
	}
	
	/**
	 * Change the size of float,and chang the type float to String.
	 * @param value the value of float.
	 * @param size the size of decimal fraction.
	 * @return new value of number by means of String.
	 */
	public static float changeFloatSize(float value,int size){
		String s = new String(value+"");
		int index = s.indexOf('.');
		float num = 0.5f;
		if(s.length()>index+size+1){
			if(s.charAt(index+size+1)>'4'){
				for(int i=0;i<size;i++)
					num *= 0.1f;
				value += num;
			}
		s = new String(value+"");
		String s1 = s.substring(0,index+size+1);
		return Float.parseFloat(s1);}
		else return value;
	}
	
//	public static int getSpeed(){
//		return (recieveTotal + transmitTotal)/1024;
//	}
	
	/**
	 * Return the size of total datas recieved.
	 * @return the value of size of total datas.
	 */
	public static int getrecieveTotal(){
		return recieveTotal/1024;
	}

	/**
	 * Return the size of total datas transmited.
	 * @return the value of size of total datas.
	 */
	public static int gettransmitTotal(){
		return transmitTotal/1024;
	}
	
	/**
	 * Return the number of packages recieved.
	 * @return number of packages.
	 */
	public static int getPackRecieve() {
		return packRecieve;
	}
	/**
	 * Return the number of packages recieved.
	 * @return number of packages.
	 */
	public static int getPackTransmit() {
		return packTransmit;
	}
	/**
	 * Return the address MAC.
	 * @return address MAC.
	 */
	public static String getMAC(){
		return MAC;
	}

}