Sigar使用之：取得网卡流量数据

在网络应用中，经常要对网卡的流量进行统计分析。

和网卡相关的统计数据主要有：网卡信息（ip地址、子网掩码、mac地址等）、网卡的吞吐量、流量等等。

当然了使用sigar也可以获得这些数据。

下面通过例子说明：

package lab.sigar;

import java.util.ArrayList;
import java.util.List;

import org.hyperic.sigar.NetInterfaceConfig;
import org.hyperic.sigar.NetInterfaceStat;
import org.hyperic.sigar.Sigar;
import org.hyperic.sigar.SigarException;

import com.thoughtworks.xstream.XStream;

/**
 * 网卡信息、接口数据、流量
 * 
 * 使用Sigar获得网卡信息
 * 
 */
public class NetInterfaceData {

    private NetInterfaceConfig config;
    private NetInterfaceStat stat;
    private long rxbps;
    private long txbps;

    public NetInterfaceData() {}

    public void populate(Sigar sigar, String name)
        throws SigarException {

        config = sigar.getNetInterfaceConfig(name);

        try {
            
            long start = System.currentTimeMillis();
            NetInterfaceStat statStart = sigar.getNetInterfaceStat(name);
    		long rxBytesStart = statStart.getRxBytes();
    		long txBytesStart = statStart.getTxBytes();
    		Thread.sleep(1000);
    		long end = System.currentTimeMillis();
    		NetInterfaceStat statEnd = sigar.getNetInterfaceStat(name);
    		long rxBytesEnd = statEnd.getRxBytes();
    		long txBytesEnd = statEnd.getTxBytes();
    		
    		rxbps = (rxBytesEnd - rxBytesStart)*8/(end-start)*1000;
    		txbps = (txBytesEnd - txBytesStart)*8/(end-start)*1000;
    		stat = sigar.getNetInterfaceStat(name);
        } catch (SigarException e) {
            
        } catch (Exception e) {
        	
        }
    }

    public static NetInterfaceData gather(Sigar sigar, String name)
        throws SigarException {
    
        NetInterfaceData data = new NetInterfaceData();
        data.populate(sigar, name);
        return data;
    }

    public NetInterfaceConfig getConfig() {
        return config;
    }

    public NetInterfaceStat getStat() {
        return stat;
    }
    
    
    
    public long getRxbps() {
		return rxbps;
	}

	public long getTxbps() {
		return txbps;
	}

	public static void main(String[] args) throws Exception {
    	Sigar sigar = new Sigar();
    	String[] netIfs = sigar.getNetInterfaceList();
    	List netIfList = new ArrayList();
    	for ( String name:netIfs ) {
    		NetInterfaceData netIfData1 = NetInterfaceData.gather(sigar, name);
    		netIfList.add(netIfData1);
    	}
    	XStream xstream = new XStream();
    	xstream.alias("NetInterfaceDatas", List.class);
		xstream.alias("NetInterfaceData", NetInterfaceData.class);
        System.out.println(xstream.toXML(netIfList));
    }
}

用到的jar包可以在《Sigar使用之：取得系统内存的数据》中取得