static {
String path = System.getProperty("user.dir");
// // 初始化信息，jar包路径，记录文件名
// URL url = TimerDeptHandle.class.getProtectionDomain().getCodeSource().getLocation();
// String path = url.getPath();
file = new File(path, filename);
if (!file.exists()) {
try {
file.createNewFile();
} catch (IOException e) {
}
}
String time = FileUtils.readFile(file);
if (StringUtils.isEmpty(time)) {
// 无数据时，默认半年前
lastUpdTime = DateUtils.add(new Date(), Calendar.MONTH, -6);
FileUtils.write(file, String.valueOf(lastUpdTime.getTime()));
} else {
// 有数据时，作为最后更新时间
lastUpdTime = new Date(Long.valueOf(time.trim()));
}
}
public Date negativeOffsetFrom(Date time) {
return DateUtils.add(time, calendarField, -quantity);
}
public Date offsetFrom(Date time) {
return DateUtils.add(time, calendarField, quantity);
}