IP地址获取
public class IPUtil { private static final String UNKNOWN = "unknown"; protected IPUtil(){ } /** * 获取 IP地址 * 使用 Nginx等反向代理软件, 则不能通过 request.getRemoteAddr()获取 IP地址 * 如果使用了多级反向代理的话,X-Forwarded-For的值并不止一个,而是一串IP地址, * X-Forwarded-For中第一个非 unknown的有效IP字符串,则为真实IP地址 */ public static String getIpAddr(HttpServletRequest request) { String ip = request.getHeader("x-forwarded-for"); if (StringUtils.isNotEmpty(ip)) { ip = ip.split(", ")[0]; } if (ip == null || ip.length() == 0 || UNKNOWN.equalsIgnoreCase(ip)) { ip = request.getHeader("Proxy-Client-IP"); } if (ip == null || ip.length() == 0 || UNKNOWN.equalsIgnoreCase(ip)) { ip = request.getHeader("WL-Proxy-Client-IP"); } if (ip == null || ip.length() == 0 || UNKNOWN.equalsIgnoreCase(ip)) { ip = request.getRemoteAddr(); } return "0:0:0:0:0:0:0:1".equals(ip) ? "127.0.0.1" : ip; } }
获取上个月月份字符串
public static final String getLastMonth() { SimpleDateFormat format = new SimpleDateFormat("yyyy-MM"); Date date = new Date(); Calendar calendar = Calendar.getInstance(); // 设置为当前时间 calendar.setTime(date); // 设置为上一个月 calendar.add(Calendar.MONTH,-1); date = calendar.getTime(); return format.format(date); }