private static final String NUKNOWN = "unknown";
    private static final String[] ADDR_HEADER = { "X-Forwarded-For", "Proxy-Client-IP", "WL-Proxy-Client-IP", "X-Real-IP" };
    /**
     * 獲取客戶端真實IP
     * 
     * @param request
     * @return
     */
    public static String getIpAddr(HttpServletRequest request) {
		String addr = null;
		for (String header : ADDR_HEADER) {
			if (StringUtil.isEmpty(addr) || NUKNOWN.equalsIgnoreCase(addr)) {
				addr = request.getHeader(header);
			} else {
				break;
			}
		}
		if (StringUtil.isEmpty(addr) || NUKNOWN.equalsIgnoreCase(addr)) {
			addr = request.getRemoteAddr();
			
	           if(addr.equals("127.0.0.1") || addr.equals("0:0:0:0:0:0:0:1")){  
                        //根據網絡卡取本機配置的IP  
                        InetAddress inet=null;  
                        try {  
                              inet = InetAddress.getLocalHost();  
                        } catch (UnknownHostException e) {  
                              e.printStackTrace();  
                        }  
                        addr= inet.getHostAddress();  
                   }  
		} else {
			// 對於通過多個代理的情況，第一個IP為客戶端真實IP,多個IP按','分割
			int i = addr.indexOf(",");
			if (i > 0) {
				addr = addr.substring(0, i);
			}
		}
		return addr;
	}