「java获取ip」java获取当前日期年月日
本篇文章给大家谈谈java获取ip,以及java获取当前日期年月日对应的知识点,希望对各位有所帮助,不要忘了收藏本站喔。
本文目录一览:
- 1、如何用 Java 获取系统 IP
- 2、java 如何提取本地IP
- 3、java如何获取用户真实的ip
- 4、java如何获取当前登录ip
- 5、java如何获取局域网内所有IP?
- 6、java中获取本地IP地址
如何用 Java 获取系统 IP
import java.net.*;
public class Test6 {
public static void main(String[] args) {
// TODO Auto-generated method stub
InetAddress ia=null;
try {
ia=ia.getLocalHost();
String localname=ia.getHostName();
String localip=ia.getHostAddress();
System.out.println("本机名称是:"+ localname);
System.out.println("本机的ip是 :"+localip);
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
java 如何提取本地IP
import java.net.*;
public class Test {
public static void main(String[] args) throws Exception {
String ip = InetAddress.getLocalHost().getHostAddress();
System.out.println(ip);
}
}
java如何获取用户真实的ip
1、如果服务器如果没有采用反向代理,而且客户端没有用正向代理的话,那么可以获取客户端的真实IP地址request.getRemoteAddr()
2、如果服务器如果没有采用反向代理,而且客户端有用正向代理的话,那么通过request.getRemoteAddr()获取客户端的IP地址是客户端 的代理服务器的地址,并不是客户端的真实地址,
3、如果客户端使用的是多层代理的话,服务器获得的客户端地址是客户端的最外围代理服务器的地址如果服务器如果采用反向代理服务器,不管客户端采用的是何种方式访问服务器。
//获得客户端真实IP地址的方法一:
public String getRemortIP(HttpServletRequest request) {
if (request.getHeader("x-forwarded-for") == null) {
return request.getRemoteAddr();
}
return request.getHeader("x-forwarded-for");
}
//获得客户端真实IP地址的方法二:
public String getIpAddr(HttpServletRequest request) {
String ip = request.getHeader("x-forwarded-for");
if(ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
ip = request.getHeader("Proxy-Client-IP");
}
if(ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
ip = request.getHeader("WL-Proxy-Client-IP");
}
if(ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
ip = request.getRemoteAddr();
}
return ip;
}
java如何获取当前登录ip
第一种:获取本机的IP
EnumerationNetworkInterface
netInterfaces
=
null;
try
{
netInterfaces
=
NetworkInterface.getNetworkInterfaces();
while
(netInterfaces.hasMoreElements())
{
NetworkInterface
ni
=
netInterfaces.nextElement();
System.out.println("DisplayName:"
+
ni.getDisplayName());
System.out.println("Name:"
+
ni.getName());
EnumerationInetAddress
ips
=
ni.getInetAddresses();
while
(ips.hasMoreElements())
{
System.out.println("IP:"
+
ips.nextElement().getHostAddress());
ipTemp=
ni.getInetAddresses().nextElement().getHostAddress();
if(ipTemp!="127.0.0.1"
!"127.0.0.1".equals(ipTemp))
{
ip=ipTemp;
}
}
}
}catch(Exception
ee)
{
ee.printStackTrace();
}
第二种:也是本机的:
InetAddress
addr
=
InetAddress.getLocalHost();
ip=addr.getHostAddress().toString();//获得本机IP
java如何获取局域网内所有IP?
1.得到局域网网段,可由自己机器的IP来确定 (也可以手动获取主机IP-CMD-ipconfig /all)
2.根据IP类型,一次遍历局域网内IP地址
JAVA类,编译之后直接运行便可以得到局域网内所有IP,具体怎样使用你自己编写相应代码调用便可
代码如下::
package bean;
import java.io.*;
import java.util.*;
public class Ip{
static public HashMap ping; //ping 后的结果集
public HashMap getPing(){ //用来得到ping后的结果集
return ping;
}
//当前线程的数量, 防止过多线程摧毁电脑
static int threadCount = 0;
public Ip() {
ping = new HashMap();
}
public void Ping(String ip) throws Exception{
//最多30个线程
while(threadCount30)
Thread.sleep(50);
threadCount +=1;
PingIp p = new PingIp(ip);
p.start();
}
public void PingAll() throws Exception{
//首先得到本机的IP,得到网段
InetAddress host = InetAddress.getLocalHost();
String hostAddress = host.getHostAddress();
int k=0;
k=hostAddress.lastIndexOf(".");
String ss = hostAddress.substring(0,k+1);
for(int i=1;i =255;i++){ //对所有局域网Ip
String iip=ss+i;
Ping(iip);
}
//等着所有Ping结束
while(threadCount0)
Thread.sleep(50);
}
public static void main(String[] args) throws Exception{
Ip ip= new Ip();
ip.PingAll();
java.util.Set entries = ping.entrySet();
Iterator iter=entries.iterator();
String k;
while(iter.hasNext()){
Map.Entry entry=(Map.Entry)iter.next();
String key=(String)entry.getKey();
String value=(String)entry.getValue();
if(value.equals("true"))
System.out.println(key+"--"+value);
}
}
class PingIp extends Thread{
public String ip; // IP
public PingIp(String ip){
this.ip=ip;
}
public void run(){
try{
Process p= Runtime.getRuntime().exec ("ping "+ip+ " -w 300 -n 1");
InputStreamReader ir = new InputStreamReader(p.getInputStream());
LineNumberReader input = new LineNumberReader (ir);
//读取结果行
for (int i=1 ; i 7; i++)
input.readLine();
String line= input.readLine();
if (line.length() 17 || line.substring(8,17).equals("timed out"))
ping.put(ip,"false");
else
ping.put(ip,"true");
//线程结束
threadCount -= 1;
}catch (IOException e){}
}
}
}
java中获取本地IP地址
方法如下:
方法一,使用CMD命令:
public static String getLocalIPForCMD(){
StringBuilder sb = new StringBuilder();
String command = "cmd.exe /c ipconfig | findstr IPv4";
try {
Process p = Runtime.getRuntime().exec(command);
BufferedReader br = new BufferedReader(new InputStreamReader(p.getInputStream()));
String line = null;
while((line = br.readLine()) != null){
line = line.substring(line.lastIndexOf(":")+2,line.length());
sb.append(line);
}
br.close();
p.destroy();
} catch (IOException e) {
e.printStackTrace();
}
return sb.toString();
}
方法二,使用Java方法:
public static String getLocalIPForJava(){
StringBuilder sb = new StringBuilder();
try {
EnumerationNetworkInterface en = NetworkInterface.getNetworkInterfaces();
while (en.hasMoreElements()) {
NetworkInterface intf = (NetworkInterface) en.nextElement();
EnumerationInetAddress enumIpAddr = intf.getInetAddresses();
while (enumIpAddr.hasMoreElements()) {
InetAddress inetAddress = (InetAddress) enumIpAddr.nextElement();
if (!inetAddress.isLoopbackAddress() !inetAddress.isLinkLocalAddress()
inetAddress.isSiteLocalAddress()) {
sb.append(inetAddress.getHostAddress().toString()+"\n");
}
}
}
} catch (SocketException e) { }
return sb.toString();
}
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