com.eshore.tools.ClientIp Maven / Gradle / Ivy
package com.eshore.tools;
import java.util.Arrays;
import javax.servlet.http.HttpServletRequest;
/**
* 获取真正的客户端IP
* @author eric
*
*/
public class ClientIp {
/**
* 获取真正的客户端IP
* @param request request
* @return host
*/
public static String getIpAddr(HttpServletRequest request) {
String ip = request.getHeader("X-Forwarded-For");
if(ip!=null){
if(ip.indexOf(',')>-1){
String[] ips =ip.split(",");
ip=ips[0];
}
}
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.getHeader("HTTP_CLIENT_IP");
}
if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
ip = request.getHeader("HTTP_X_FORWARDED_FOR");
}
if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
ip = request.getRemoteAddr();
}
return ip;
}
public static int ipv4toint(String ip) {
if (ip==null||ip.length()<4) {
return -1;
}
String[] ipArr = ip.split("\\.");
if (ipArr.length != 4) {
return -1;
}
int x = 0;
for (int i = 0; i < ipArr.length; i++) {
x = ((x << 8) | Integer.valueOf(ipArr[i]));
}
return x;
}
public static String inttoipv4(int ip) {
String[] ipArr = new String[4];
for (int i = 0; i < ipArr.length; i++) {
int n = (ip >>> (8 * i)) & (0xFF);
ipArr[3 - i] = String.valueOf(n);
}
return String.join(".", ipArr);
}
/**
* 将 IPv6 地址转为 long 数组，只支持冒分十六进制表示法
*/
/**
*
* @param ipString ip
* @return 十六进制表示法
*/
public static long[] ip2Longs(String ipString) {
if (ipString == null || ipString.isEmpty()) {
throw new IllegalArgumentException("ipString cannot be null.");
}
String[] ipSlices = ipString.split(":");
if (ipSlices.length != 8) {
throw new IllegalArgumentException(ipString + " is not an ipv6 address.");
}
long[] ipv6 = new long[2];
for (int i = 0; i < 8; i++) {
String slice = ipSlices[i];
// 以 16 进制解析
long num = Long.parseLong(slice, 16);
// 每组 16 位
long right = num << (16 * i);
// 每个 long 保存四组，i >> 2 = i / 4
ipv6[i >> 2] |= right;
}
return ipv6;
}
/**
* 将 long 数组转为冒分十六进制表示法的 IPv6 地址
*/
/**
*
* @param numbers numbers
* @return ip
*/
public static String longs2Ip(long[] numbers) {
if (numbers == null || numbers.length != 2) {
throw new IllegalArgumentException(Arrays.toString(numbers) + " is not an IPv6 address.");
}
StringBuilder sb = new StringBuilder(32);
for (long numSlice : numbers) {
// 每个 long 保存四组
for (int j = 0; j < 4; j++) {
// 取最后 16 位
long current = numSlice & 0xFFFF;
sb.append(Long.toString(current, 16)).append(":");
// 右移 16 位，即去除掉已经处理过的 16 位
numSlice >>= 16;
}
}
// 去掉最后的 :
return sb.substring(0, sb.length() - 1);
}
}