Java获取IP地址

1import java.net.Inet4Address;
2import java.net.InetAddress;
3import java.net.NetworkInterface;
4import java.util.Enumeration;
5
6import javax.servlet.http.HttpServletRequest;
7
8/**
9 * @version v1.0
10 * @Description: TODO
11 * @Author: cnb
12 * @Date: 2020/1/18 23:08
13 */
14public class IpUtils {
15
16    private static final String[] HEADERS = {
17            "X-Forwarded-For",
18            "Proxy-Client-IP",
19            "WL-Proxy-Client-IP",
20            "HTTP_X_FORWARDED_FOR",
21            "HTTP_X_FORWARDED",
22            "HTTP_X_CLUSTER_CLIENT_IP",
23            "HTTP_CLIENT_IP",
24            "HTTP_FORWARDED_FOR",
25            "HTTP_FORWARDED",
26            "HTTP_VIA",
27            "REMOTE_ADDR",
28            "X-Real-IP"
29    };
30
31    /**
32     * 判断ip是否为空，空返回true
33     * @param ip
34     * @return
35     */
36    public static boolean isEmptyIp(final String ip){
37        return (ip == null || ip.length() == 0 || ip.trim().equals("") || "unknown".equalsIgnoreCase(ip));
38    }
39
40
41    /**
42     * 判断ip是否不为空，不为空返回true
43     * @param ip
44     * @return
45     */
46    public static boolean isNotEmptyIp(final String ip){
47        return !isEmptyIp(ip);
48    }
49
50    /***
51     * 获取客户端ip地址(可以穿透代理)
52     * @param request HttpServletRequest
53     * @return
54     */
55    public static String getIpAddress(HttpServletRequest request) {
56        String ip = "";
57        for (String header : HEADERS) {
58            ip = request.getHeader(header);
59            if(isNotEmptyIp(ip)) {
60                break;
61            }
62        }
63        if(isEmptyIp(ip)){
64            ip = request.getRemoteAddr();
65        }
66        if(isNotEmptyIp(ip) && ip.contains(",")){
67            ip = ip.split(",")[0];
68        }
69        if("0:0:0:0:0:0:0:1".equals(ip)){
70            ip = "127.0.0.1";
71        }
72        return ip;
73    }
74
75
76    /**
77     * 获取本机的局域网ip地址，兼容Linux
78     * @return String
79     * @throws Exception
80     */
81    public String getLocalHostIP() throws Exception{
82        Enumeration<NetworkInterface> allNetInterfaces = NetworkInterface.getNetworkInterfaces();
83        String localHostAddress = "";
84        while(allNetInterfaces.hasMoreElements()){
85            NetworkInterface networkInterface = allNetInterfaces.nextElement();
86            Enumeration<InetAddress> address = networkInterface.getInetAddresses();
87            while(address.hasMoreElements()){
88                InetAddress inetAddress = address.nextElement();
89                if(inetAddress != null && inetAddress instanceof Inet4Address){
90                    localHostAddress = inetAddress.getHostAddress();
91                }
92            }
93        }
94        return localHostAddress;
95    }
96    
97}