SpringBoot系列：获取当前登录用户IP

SpringBoot 获取当前登录用户IP

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前言

今天博主将为大家分享SpringBoot系列：获取当前登录用户IP，不喜勿喷，如有异议欢迎讨论！

有一个强大的地基才能写出健壮的程序！

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活不多说上代码

控制器方法:

package com.cyj.controller;

import javax.servlet.http.HttpServletRequest;

import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RestController;

import com.cyj.util.IpUtil;

/**
 * 
 * @Description: 获取ip控制器
 * @ClassName: IpController.java
 * @author ChenYongJia
 * @Date 2019年4月20日 晚上20:25
 * @Email [email protected]
 */
@RestController
public class IpController {
	
	@RequestMapping(value = "/getIp", method = RequestMethod.POST)
    public String getIp(HttpServletRequest request) {
        return IpUtil.getIpAddr(request);
    }
	
}

工具类方法

    package com.jmccms.util;

import lombok.extern.slf4j.Slf4j;

import javax.servlet.http.HttpServletRequest;
import java.net.*;
import java.util.Enumeration;

/**
 * @Description: 获取IP方法
 * @BelongsProject: Jmccms
 * @BelongsPackage: com.jmccms.util
 * @Author: ChenYongJia
 * @CreateTime: 2019-05-14 22:29
 * @Email [email protected]
 */
@Slf4j
public class IpUtils {
    private static final String LOCAL_IP = "127.0.0.1";

    public static String getIpAddr(HttpServletRequest request) {
        if (request == null) {
            return "unknown";
        }
        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("X-Forwarded-For");
        }
        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("X-Real-IP");
        }

        if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
            ip = request.getRemoteAddr();
        }

        return "0:0:0:0:0:0:0:1".equals(ip) ? LOCAL_IP : ip;
    }

    public static boolean internalIp(String ip) {
        boolean res = false;
        byte[] addr = textToNumericFormatV4(ip);
        if (addr != null && ip != null) {
            res = internalIp(addr) || LOCAL_IP.equals(ip);
        }
        return res;
    }

    private static boolean internalIp(byte[] addr) {
        final byte b0 = addr[0];
        final byte b1 = addr[1];
        // 10.x.x.x/8
        final byte SECTION_1 = 0x0A;
        // 172.16.x.x/12
        final byte SECTION_2 = (byte) 0xAC;
        final byte SECTION_3 = (byte) 0x10;
        final byte SECTION_4 = (byte) 0x1F;
        // 192.168.x.x/16
        final byte SECTION_5 = (byte) 0xC0;
        final byte SECTION_6 = (byte) 0xA8;
        boolean flag = false;
        switch (b0) {
            case SECTION_1:
                flag = true;
                break;
            case SECTION_2:
                if (b1 >= SECTION_3 && b1 <= SECTION_4) {
                    flag = true;
                }
                break;
            case SECTION_5:
                if (b1 == SECTION_6) {
                    flag = true;
                }
                break;
            default:
                break;
        }
        return flag;
    }

    /**
     * 将IPv4地址转换成字节
     *IPv4地址
     * @param text
     * @return byte 字节
     */
    public static byte[] textToNumericFormatV4(String text) {
        if (text.length() == 0) {
            return null;
        }

        byte[] bytes = new byte[4];
        String[] elements = text.split("\\.", -1);
        try {
            long l;
            int i;
            switch (elements.length) {
                case 1:
                    l = Long.parseLong(elements[0]);
                    if ((l < 0L) || (l > 4294967295L))
                        return null;
                    bytes[0] = (byte) (int) (l >> 24 & 0xFF);
                    bytes[1] = (byte) (int) ((l & 0xFFFFFF) >> 16 & 0xFF);
                    bytes[2] = (byte) (int) ((l & 0xFFFF) >> 8 & 0xFF);
                    bytes[3] = (byte) (int) (l & 0xFF);
                    break;
                case 2:
                    l = Integer.parseInt(elements[0]);
                    if ((l < 0L) || (l > 255L))
                        return null;
                    bytes[0] = (byte) (int) (l & 0xFF);
                    l = Integer.parseInt(elements[1]);
                    if ((l < 0L) || (l > 16777215L))
                        return null;
                    bytes[1] = (byte) (int) (l >> 16 & 0xFF);
                    bytes[2] = (byte) (int) ((l & 0xFFFF) >> 8 & 0xFF);
                    bytes[3] = (byte) (int) (l & 0xFF);
                    break;
                case 3:
                    for (i = 0; i < 2; ++i) {
                        l = Integer.parseInt(elements[i]);
                        if ((l < 0L) || (l > 255L))
                            return null;
                        bytes[i] = (byte) (int) (l & 0xFF);
                    }
                    l = Integer.parseInt(elements[2]);
                    if ((l < 0L) || (l > 65535L))
                        return null;
                    bytes[2] = (byte) (int) (l >> 8 & 0xFF);
                    bytes[3] = (byte) (int) (l & 0xFF);
                    break;
                case 4:
                    for (i = 0; i < 4; ++i) {
                        l = Integer.parseInt(elements[i]);
                        if ((l < 0L) || (l > 255L))
                            return null;
                        bytes[i] = (byte) (int) (l & 0xFF);
                    }
                    break;
                default:
                    return null;
            }
        } catch (NumberFormatException e) {
            log.error("数字格式化异常",e);
            return null;
        }
        return bytes;
    }

    public static String getLocalIP() {
        String ip = "";
        if (System.getProperty("os.name").toLowerCase().startsWith("windows")) {
            InetAddress addr;
            try {
                addr = InetAddress.getLocalHost();
                ip = addr.getHostAddress();
            } catch (UnknownHostException e) {
                log.error("获取失败",e);
            }
            return ip;
        } else {
            try {
                Enumeration e1 = (Enumeration) NetworkInterface
                        .getNetworkInterfaces();
                while (e1.hasMoreElements()) {
                    NetworkInterface ni = (NetworkInterface) e1.nextElement();
                    if (!ni.getName().equals("eth0")) {
                        continue;
                    } else {
                        Enumeration e2 = ni.getInetAddresses();
                        while (e2.hasMoreElements()) {
                            InetAddress ia = (InetAddress) e2.nextElement();
                            if (ia instanceof Inet6Address)
                                continue;
                            ip = ia.getHostAddress();
                            return ip;
                        }
                        break;
                    }
                }
            } catch (SocketException e) {
                log.error("获取失败",e);
            }
        }
        return "";
    }
}

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到这里SpringBoot系列：获取当前登录用户IP，分享完毕了，快去试试吧！下一波将分享《Redis的下载安装》和SpringBoot-Jpa-Redis案例分享！

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