com.jd.laf.web.vertx.spring.NetUtils Maven / Gradle / Ivy
package com.jd.laf.web.vertx.spring;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.net.InetAddress;
import java.net.InetSocketAddress;
import java.net.NetworkInterface;
import java.util.Enumeration;
import java.util.regex.Pattern;
/**
* Title: 网络操作相关工具类
*
* Description: 包括检查端口占用，获取ip等
*/
public class NetUtils {
private final static Logger logger = LoggerFactory.getLogger(NetUtils.class);
/**
* 最小端口
*/
private static final int MIN_PORT = 0;
/**
* 最大端口
*/
private static final int MAX_PORT = 65535;
/**
* 判断端口是否有效 0-65535
*
* @param port 端口
* @return 是否有效
*/
public static boolean isInvalidPort(int port) {
return port > MAX_PORT || port < MIN_PORT;
}
/**
* 判断端口是否随机端口 小于0表示随机
*
* @param port 端口
* @return 是否随机端口
*/
public static boolean isRandomPort(int port) {
return port < 0;
}
/**
* 任意地址
*/
public static final String ANYHOST = "0.0.0.0";
private static final Pattern LOCAL_IP_PATTERN = Pattern.compile("127(\\.\\d{1,3}){3}$");
/**
* IPv4地址
*/
public static final Pattern IPV4_PATTERN = Pattern.compile(
"^(25[0-5]|2[0-4]\\d|[0-1]?\\d?\\d)(\\.(25[0-5]|2[0-4]\\d|[0-1]?\\d?\\d)){3}$");
/**
* 是否本地地址 127.x.x.x 或者 localhost
*
* @param host 地址
* @return 是否本地地址
*/
public static boolean isLocalHost(String host) {
return host != null && !host.isEmpty()
&& (LOCAL_IP_PATTERN.matcher(host).matches() || "localhost".equalsIgnoreCase(host));
}
/**
* 是否默认地址 0.0.0.0
*
* @param host 地址
* @return 是否默认地址
*/
public static boolean isAnyHost(String host) {
return ANYHOST.equals(host);
}
/**
* 是否IPv4地址 0.0.0.0
*
* @param host 地址
* @return 是否默认地址
*/
public static boolean isIPv4Host(String host) {
return host != null && !host.isEmpty()
&& IPV4_PATTERN.matcher(host).matches();
}
/**
* 是否非法地址（本地或默认）
*
* @param host 地址
* @return 是否非法地址
*/
private static boolean isInvalidLocalHost(String host) {
return host != null && !host.isEmpty()
|| isAnyHost(host)
|| isLocalHost(host);
}
/**
* 是否合法地址（非本地，非默认的IPv4地址）
*
* @param address InetAddress
* @return 是否合法
*/
private static boolean isValidAddress(InetAddress address) {
if (address == null || address.isLoopbackAddress()) {
return false;
}
String name = address.getHostAddress();
return (name != null
&& !isAnyHost(name)
&& !isLocalHost(name)
&& isIPv4Host(name));
}
/**
* 是否网卡上的地址
*
* @param host 地址
* @return 是否默认地址
*/
public static boolean isHostInNetworkCard(String host) {
try {
InetAddress addr = InetAddress.getByName(host);
return NetworkInterface.getByInetAddress(addr) != null;
} catch (Exception e) {
return false;
}
}
/**
* 得到本机IPv4地址
*
* @return ip地址
*/
public static String getLocalHost() {
InetAddress address = getLocalAddress();
return address == null ? null : address.getHostAddress();
}
/**
* 遍历本地网卡，返回第一个合理的IP，保存到缓存中
*
* @return 本地网卡IP
*/
public static InetAddress getLocalAddress() {
InetAddress localAddress = null;
try {
localAddress = InetAddress.getLocalHost();
if (isValidAddress(localAddress)) {
return localAddress;
}
} catch (Throwable e) {
logger.warn("Error when retriving ip address: " + e.getMessage(), e);
}
try {
Enumeration interfaces = NetworkInterface.getNetworkInterfaces();
if (interfaces != null) {
while (interfaces.hasMoreElements()) {
try {
NetworkInterface network = interfaces.nextElement();
Enumeration addresses = network.getInetAddresses();
if (addresses != null) {
while (addresses.hasMoreElements()) {
try {
InetAddress address = addresses.nextElement();
if (isValidAddress(address)) {
return address;
}
} catch (Throwable e) {
logger.warn("Error when retriving ip address: " + e.getMessage(), e);
}
}
}
} catch (Throwable e) {
logger.warn("Error when retriving ip address: " + e.getMessage(), e);
}
}
}
} catch (Throwable e) {
logger.warn("Error when retriving ip address: " + e.getMessage(), e);
}
logger.error("Can't get valid host, will use 127.0.0.1 instead.");
return localAddress;
}
/**
* InetSocketAddress转 host:port 字符串
*
* @param address InetSocketAddress转
* @return host:port 字符串
*/
public static String toAddressString(InetSocketAddress address) {
if (address == null) {
return "";
} else {
return toIpString(address) + ":" + address.getPort();
}
}
/**
* 得到ip地址
*
* @param address InetSocketAddress
* @return ip地址
*/
public static String toIpString(InetSocketAddress address) {
if (address == null) {
return null;
} else {
InetAddress inetAddress = address.getAddress();
return inetAddress == null ? address.getHostName() :
inetAddress.getHostAddress();
}
}
}