IpAddress 工具类

import javax.servlet.http.HttpServletRequest;
import java.net.InetAddress;
import java.net.UnknownHostException;

/**
 * @author laomao
 * @version 1.0
 * @description: TODO
 * @date 2020/9/27 上午10:10
 */
public class IpAddress {
    
    

    public static String getIpAddr(HttpServletRequest request) {
    
    
        String ipAddress = null;
        try {
    
    
            ipAddress = request.getHeader("x-forwarded-for");
            if (ipAddress == null || ipAddress.length() == 0 || "unknown".equalsIgnoreCase(ipAddress)) {
    
    
                ipAddress = request.getHeader("Proxy-Client-IP");
            }
            if (ipAddress == null || ipAddress.length() == 0 || "unknown".equalsIgnoreCase(ipAddress)) {
    
    
                ipAddress = request.getHeader("WL-Proxy-Client-IP");
            }
            if (ipAddress == null || ipAddress.length() == 0 || "unknown".equalsIgnoreCase(ipAddress)) {
    
    
                ipAddress = request.getRemoteAddr();
                if (ipAddress.equals("127.0.0.1")) {
    
    
                    // 根据网卡取本机配置的IP
                    InetAddress inet = null;
                    try {
    
    
                        inet = InetAddress.getLocalHost();
                    } catch (UnknownHostException e) {
    
    
                        e.printStackTrace();
                    }
                    ipAddress = inet.getHostAddress();
                }
            }
            // 对于通过多个代理的情况，第一个IP为客户端真实IP,多个IP按照','分割
            if (ipAddress != null && ipAddress.length() > 15) {
    
     // "***.***.***.***".length()
                // = 15
                if (ipAddress.indexOf(",") > 0) {
    
    
                    ipAddress = ipAddress.substring(0, ipAddress.indexOf(","));
                }
            }
        } catch (Exception e) {
    
    
            ipAddress="";
        }
        return ipAddress;
    }
}