工具集-CommonUtil

/**
 * 获取ip
 * @param request
 * @return
 */
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;
}



public static String MD5(String data)  {
	try {
		java.security.MessageDigest md = MessageDigest.getInstance("MD5");
		byte[] array = md.digest(data.getBytes("UTF-8"));
		StringBuilder sb = new StringBuilder();
		for (byte item : array) {
			sb.append(Integer.toHexString((item & 0xFF) | 0x100).substring(1, 3));
		}

		return sb.toString().toUpperCase();
	} catch (Exception exception) {
	}
	return null;

}