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java如何查询本机ip地址和mac地址
Java中可以使用程序来获取本地ip地址和mac地址，使用InetAddress这个工具类，示例如下：
import java.net.*;
public class NetInfo {
public static void main(String[] args) {
new NetInfo().say();
}
public void say() {
try {
InetAddress i = InetAddress.getLocalHost();
System.out.println(i); //计算机名称和IP
System.out.println(i.getHostName()); //名称
System.out.println(i.getHostAddress()); //只获得IP
} catch(Exception e) {
e.printStackTrace();
}
}
}
也可以通过命令行窗口来查看本地ip和mac地址，输入命令：ipconfig。
java 如何计算一个ip的归属地
import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.net.URL;
import java.net.URLConnection;
public class Test {
public static void main(String[] args) throws Exception {
//查询IP的接口;ip=123.115.132.140appkey=10003sign=b59bc3ef6191eb9f747dd4e83c99f2a4format=json
BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
System.out.println("请输入要查询的IP地址：");
String ip = br.readLine();
String str_url = ";ip=" + ip + "appkey=10003sign=b59bc3ef6191eb9f747dd4e83c99f2a4format=json";
URL url = new URL(str_url);
URLConnection conn = url.openConnection();
BufferedReader retun = new BufferedReader(new InputStreamReader(conn.getInputStream()));
//这里返回的是一个JSON的格式，自己解析吧。
System.out.println(retun.readLine());
retun.close();
}
}
如何用java获取本地ip地址
import java.net.Inet4Address;
import java.net.InetAddress;
import java.net.NetworkInterface;
import java.net.SocketException;
import java.util.ArrayList;
import java.util.Enumeration;
import java.util.List;
/**
* @author Becolette
* @description TODO
* @date 2015-11-5 下午01:58:46
*/
public class IpAddress {
public static String find() {
List<String> ips = new ArrayList<String>();
// 返回所有网络接口的一个枚举实例
Enumeration<?> allNetInterfaces = null;
try {
allNetInterfaces = NetworkInterface.getNetworkInterfaces();
} catch (SocketException e) {
e.printStackTrace();
}
InetAddress ip = null;
while (allNetInterfaces.hasMoreElements()) {
NetworkInterface netInterface = (NetworkInterface) allNetInterfaces.nextElement();
Enumeration<InetAddress> addresses = netInterface.getInetAddresses();
while (addresses.hasMoreElements()) {
// 获得当前网络接口
ip = (InetAddress) addresses.nextElement();
if (ip != null && ip instanceof Inet4Address && ip.getHostAddress().indexOf(".") != -1) {
ips.add(ip.getHostAddress());
}
}
}
if (ips.size() == 1) {
return ips.get(0);
} else {
for (String ipa : ips) {
if (!"127.0.0.1".equals(ipa)) {
return ipa;
}
}
}
return MacAddress.find();
}
}
java IP查询方法
Java编程查询IP地址归属地，可以调用淘宝提供的service查询，并且解析http请求返回的json串，代码如下：
package getAddressByIp;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;
import net.sf.json.JSONObject;
public class GetAddressByIp {
/**
*
* @param IP
* @return
*/
public static String GetAddressByIp(String IP) {
String resout = "";
try {
String str = getJsonContent("" + IP);
System.out.println(str);
JSONObject obj = JSONObject.fromObject(str);
JSONObject obj2 = (JSONObject) obj.get("data");
String code = (String) obj.get("code");
if (code.equals("0")) {
resout = obj2.get("country") + "--" + obj2.get("area") + "--" + obj2.get("city") + "--" + obj2.get("isp");
} else {
resout = "IP地址有误";
}
} catch (Exception e) {
e.printStackTrace();
resout = "获取IP地址异常：" + e.getMessage();
}
return resout;
}
public static String getJsonContent(String urlStr) {
try {
// 获取HttpURLConnection连接对象
URL url = new URL(urlStr);
HttpURLConnection httpConn = (HttpURLConnection) url.openConnection();
// 设置连接属性
httpConn.setConnectTimeout(3000);
httpConn.setDoInput(true);
httpConn.setRequestMethod("GET");
// 获取相应码
int respCode = httpConn.getResponseCode();
if (respCode == 200) {
return ConvertStream2Json(httpConn.getInputStream());
}
} catch (MalformedURLException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
return "";
}
private static String ConvertStream2Json(InputStream inputStream) {
String jsonStr = "";
// ByteArrayOutputStream相当于内存输出流
ByteArrayOutputStream out = new ByteArrayOutputStream();
byte[] buffer = new byte[1024];
int len = 0;
// 将输入流转移到内存输出流中
try {
while ((len = inputStream.read(buffer, 0, buffer.length)) != -1) {
out.write(buffer, 0, len);
}
// 将内存流转换为字符串
jsonStr = new String(out.toByteArray());
} catch (IOException e) {
e.printStackTrace();
}
return jsonStr;
}
}
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 {
Enumeration<NetworkInterface> en = NetworkInterface.getNetworkInterfaces();
while (en.hasMoreElements()) {
NetworkInterface intf = (NetworkInterface) en.nextElement();
Enumeration<InetAddress> 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();
}
