java代码实现ping JAVA代码实现计算天数差,不足一天,取两位小数
如何java编程实现PING命令
你应该看看api process 返回的是流,按照输出流的方法操作即可.公司上不去外网,有代理才行,所以没有ping 百度,ping的本机.
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import java.io.BufferedReader;
import java.io.InputStreamReader;
public class CallCmd {
public static void main(String[] args) {
BufferedReader br = null;
try {
Process p = Runtime.getRuntime().exec("ping 127.0.0.1");
br = new BufferedReader(new InputStreamReader(p.getInputStream()));
String line = null;
StringBuilder sb=new StringBuilder();
while ((line = br.readLine()) != null) {
sb.append(line+"\n");
}
System.out.println(sb.toString());
} catch (Exception e) {
e.printStackTrace();
} finally {
if (br != null) {
try {
br.close();
} catch (Exception e) {
e.printStackTrace();
}
}
}
}
}
有谁知道怎样使用java编写ping程序
jpcap你要自己下好相应的包和配置，不知道的就在网上搜吧··
import java点虐 .InetAddress;
import java.util.ArrayList;
import java.util.GregorianCalendar;
import java.util.List;
import jpcap.JpcapCaptor;
import jpcap.JpcapSender;
import jpcap.NetworkInterface;
import jpcap.packet.EthernetPacket;
import jpcap.packet.ICMPPacket;
import jpcap.packet.IPPacket;
public class JPing {
private NetworkInterface[] devices = JpcapCaptor.getDeviceList();
private JpcapSender sender;
private JpcapCaptor jpcap;
private ICMPPacket icmpPacket;
private ListString listResult = new ArrayListString();
/**
* 组织ICMP报文发送，并开启线程接收报文
* @param ip
*/
public void ping(String ip) {
try {
jpcap = JpcapCaptor.openDevice(devices[0], 200, false, 20);
sender = jpcap.getJpcapSenderInstance();
jpcap.setFilter("icmp", true);// 过滤器，只接受ICMP报文
icmpPacket = new ICMPPacket();
icmpPacket.type = ICMPPacket.ICMP_ECHO; // 发送回显请求报文
icmpPacket.setIPv4Parameter(0, false, false, false, 0, false,
false, false, 0, 1010101, 100, IPPacket.IPPROTO_ICMP,
devices[0].addresses[1].address, InetAddress.getByName(ip));
// 随意的32bytes数据
icmpPacket.data = "abcdefghijklmnopqrstuvwxyzabcdef".getBytes();
EthernetPacket ethernetPacket = new EthernetPacket();
ethernetPacket.frametype = EthernetPacket.ETHERTYPE_IP;
ethernetPacket.src_mac = devices[0].mac_address;
// 广播地址
ethernetPacket.dst_mac = new byte[] { (byte) 0xff, (byte) 0xff,
(byte) 0xff, (byte) 0xff, (byte) 0xff, (byte) 0xff };
icmpPacket.datalink = ethernetPacket;
listResult.add("Pinging " + icmpPacket.dst_ip + " with "
+ icmpPacket.data.length + " bytes of data: ");
startCapThread(jpcap);
for (int i = 0; i 5; i++) {
icmpPacket.sec = 0;
//icmpPacket.usec = System.currentTimeMillis();
icmpPacket.usec = new GregorianCalendar().getTimeInMillis();// 记录发送时间
icmpPacket.seq = (short) (1000 + i);
icmpPacket.id = (short) (999 + i);
sender.sendPacket(icmpPacket);
try {
Thread.sleep(1000);
} catch (Exception e) {
e.printStackTrace();
}
}
} catch (Exception e) {
e.printStackTrace();
}
}
/**
* 接收ICMP报文
* @param jpcap
*/
public void getIcmpPacket(JpcapCaptor jpcapCaptor) {
try {
while (true) {
long tmp = 0;
String tmpStr = null;
ICMPPacket rp;
rp = (ICMPPacket) jpcapCaptor.getPacket();
if ((rp != null) (rp.seq - rp.id == 1)
(rp.type == ICMPPacket.ICMP_ECHOREPLY)) {// 若是ICMP回应报文，则列出。。。
tmp = (rp.sec * 1000 + rp.usec / 1000 - icmpPacket.sec
* 1000 - icmpPacket.usec); // 计算发送与接受的时间差
if (tmp = 0)
tmpStr = " 1 ms ";
else
tmpStr = "= " + tmp + " ms ";
System.out.println("Reply from "
+ rp.src_ip.getHostAddress() + ": bytes = "
+ rp.data.length + " time " + tmpStr + "TTL = "
+ rp.hop_limit);
listResult.add("Reply from " + rp.src_ip.getHostAddress()
+ ": bytes = " + rp.data.length + " time " + tmpStr
+ "TTL = " + rp.hop_limit);
}
}
} catch (Exception e) {
e.printStackTrace();
}
}
/**
* 接收ICMP报文
* @param jpcap
*/
public void startCapThread(final JpcapCaptor jpcap) {
Runnable runner = new Runnable() {
public void run() {
getIcmpPacket(jpcap);
}
};
new Thread(runner).start();
}
public static void main(String[] args) {
new JPing().ping("");
}
}
java怎样实现ping的功能...
可以用InetAddress的isReachable方法：
import java点虐 .InetAddress;
public class MainTest {
public static void main(String[] args) {
try {
int timeOut = 3000;
byte[] ip = new byte[] { (byte) 192, (byte) 168, (byte) 100, (byte) 151 };
int retry = 4;
InetAddress address = InetAddress.getByAddress(ip);
for (int i = 0; i retry; i++) {
if (address.isReachable(timeOut)) {
System.out.println(i + " OK");
} else {
System.out.println(i + " LOSS");
}
}
} catch (Exception e) {
e.printStackTrace();
}
}
}
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