corn表达式如下
@Scheduled(cron = "0 0 23 L * ?") 每月最后一天23:00执行定时任务,但是运行报错
java.lang.IllegalStateException: Encountered invalid @Scheduled method 'LastReportOfMonth': For input string: "L"
请问是怎么回事?配置的问题吗,请教!!
@Scheduled(cron = "0 0 23 L * ?") 每月最后一天23:00执行定时任务,但是运行报错
java.lang.IllegalStateException: Encountered invalid @Scheduled method 'LastReportOfMonth': For input string: "L"
请问是怎么回事?配置的问题吗,请教!!
附上解析部分源码:private void parse(String expression) throws IllegalArgumentException {
String[] fields = StringUtils.tokenizeToStringArray(expression, " ");
if (fields.length != 6) {
throw new IllegalArgumentException(String.format(
"Cron expression must consist of 6 fields (found %d in \"%s\")", fields.length, expression));
}
setNumberHits(this.seconds, fields[0], 0, 60);
setNumberHits(this.minutes, fields[1], 0, 60);
setNumberHits(this.hours, fields[2], 0, 24);
setDaysOfMonth(this.daysOfMonth, fields[3]);
setMonths(this.months, fields[4]);
setDays(this.daysOfWeek, replaceOrdinals(fields[5], "SUN,MON,TUE,WED,THU,FRI,SAT"), 8);
if (this.daysOfWeek.get(7)) {
// Sunday can be represented as 0 or 7
this.daysOfWeek.set(0);
this.daysOfWeek.clear(7);
}
}
private void setDaysOfMonth(BitSet bits, String field) {
int max = 31;
// Days of month start with 1 (in Cron and Calendar) so add one
setDays(bits, field, max + 1);
// ... and remove it from the front
bits.clear(0);
} private void setDays(BitSet bits, String field, int max) {
if (field.contains("?")) {
field = "*";
}
setNumberHits(bits, field, 0, max);
}
private void setNumberHits(BitSet bits, String value, int min, int max) {
String[] fields = StringUtils.delimitedListToStringArray(value, ",");
for (String field : fields) {
if (!field.contains("/")) {
// Not an incrementer so it must be a range (possibly empty)
int[] range = getRange(field, min, max);
bits.set(range[0], range[1] + 1);
}
else {
String[] split = StringUtils.delimitedListToStringArray(field, "/");
if (split.length > 2) {
throw new IllegalArgumentException("Incrementer has more than two fields: '" +
field + "' in expression \"" + this.expression + "\"");
}
int[] range = getRange(split[0], min, max);
if (!split[0].contains("-")) {
range[1] = max - 1;
}
int delta = Integer.valueOf(split[1]);
if (delta <= 0) {
throw new IllegalArgumentException("Incrementer delta must be 1 or higher: '" +
field + "' in expression \"" + this.expression + "\"");
}
for (int i = range[0]; i <= range[1]; i += delta) {
bits.set(i);
}
}
}
}private int[] getRange(String field, int min, int max) {
int[] result = new int[2];
if (field.contains("*")) {
result[0] = min;
result[1] = max - 1;
return result;
}
if (!field.contains("-")) {
result[0] = result[1] = Integer.valueOf(field);
}
else {
String[] split = StringUtils.delimitedListToStringArray(field, "-");
if (split.length > 2) {
throw new IllegalArgumentException("Range has more than two fields: '" +
field + "' in expression \"" + this.expression + "\"");
}
result[0] = Integer.valueOf(split[0]);
result[1] = Integer.valueOf(split[1]);
}
if (result[0] >= max || result[1] >= max) {
throw new IllegalArgumentException("Range exceeds maximum (" + max + "): '" +
field + "' in expression \"" + this.expression + "\"");
}
if (result[0] < min || result[1] < min) {
throw new IllegalArgumentException("Range less than minimum (" + min + "): '" +
field + "' in expression \"" + this.expression + "\"");
}
return result;
}
cron = "0 0 0 1 * ?“