Java写一下获取网页请求时的IP地址代码

以下是Java获取网页请求时的IP地址代码：

import javax.servlet.http.HttpServletRequest;

public class GetIPAddress {
    public static String getIPAddress(HttpServletRequest request) {
        String ipAddress = request.getHeader("x-forwarded-for");
        if (ipAddress == null || ipAddress.length() ==  || "unknown".equalsIgnoreCase(ipAddress)) {
            ipAddress = request.getHeader("Proxy-Client-IP");
        }
        if (ipAddress == null || ipAddress.length() ==  || "unknown".equalsIgnoreCase(ipAddress)) {
            ipAddress = request.getHeader("WL-Proxy-Client-IP");
        }
        if (ipAddress == null || ipAddress.length() ==  || "unknown".equalsIgnoreCase(ipAddress)) {
            ipAddress = request.getRemoteAddr();
        }
        return ipAddress;
    }
}

这段代码通过HttpServletRequest对象获取请求头中的IP地址信息，如果请求头中没有IP地址信息，则获取远程客户端的IP地址。