Java获取客户端真实IP 解决request.getRemoteAddr()

/**
	* 获取客户端的真实IP
	*/
	public String getRealIpAddr(HttpServletRequest request) {
		String ipAddress = null;
		ipAddress = request.getHeader("x-forwarded-for");
		//System.out.println("ipAddress:" + ipAddress);
		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") || ipAddress.equals("0:0:0:0:0:0:0:1")) {
				//根据网卡取本机配置的IP
				InetAddress inet = null;
				try {
					inet = InetAddress.getLocalHost();
				} catch (Exception e) {
					e.printStackTrace();
				}
				ipAddress = inet.getHostAddress();
			}

		}
		// 多个IP按照','分割(jiequ)
		// 对于通过多个代理的情况，第一个IP为客户端真实IP
		// '***.***.***.***'.length() = 15
		if (null != ipAddress && ipAddress.length() > 15) {
			if (ipAddress.indexOf(",") > 0) {
				ipAddress = ipAddress.substring(0, ipAddress.indexOf(","));
			}
		}
		//System.out.println("ip:" + ipAddress);
		return ipAddress;
	}