IP地址獲取
public class IPUtil { private static final String UNKNOWN = "unknown"; protected IPUtil(){ } /** * 獲取 IP地址 * 使用 Nginx等反向代理軟件, 則不能通過 request.getRemoteAddr()獲取 IP地址 * 如果使用了多級反向代理的話,X-Forwarded-For的值並不止一個,而是一串IP地址, * X-Forwarded-For中第一個非 unknown的有效IP字符串,則爲真實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; } }
獲取上個月月份字符串
public static final String getLastMonth() { SimpleDateFormat format = new SimpleDateFormat("yyyy-MM"); Date date = new Date(); Calendar calendar = Calendar.getInstance(); // 設置爲當前時間 calendar.setTime(date); // 設置爲上一個月 calendar.add(Calendar.MONTH,-1); date = calendar.getTime(); return format.format(date); }