public class StringUtil { public static boolean isNotNull(String str){ return !isNull(str); } public static boolean isNull(String str){ if(str == null || str.trim().isEmpty()) return true; return false; } public static boolean isNumber(String str) { try{ new BigDecimal(str); return true; }catch (NumberFormatException e) { return false; } } // 格式化时间 public static String formatTime(Time time,String formatter) { if(time!=null) { Date date = time.getCalendar().getTime(); return new SimpleDateFormat(formatter).format(date); } return ""; } }
StringUtil
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