/**
* @param date yyyy-MM-dd HH:mm:ss
* @return
*/
public static boolean isValidDate(String date) {
try {
int year = Integer.parseInt(date.substring(0, 4))
if (year <= 0)
return false
int month = Integer.parseInt(date.substring(5, 7))
if (month <= 0 || month > 12)
return false
int day = Integer.parseInt(date.substring(8, 10))
if (day <= 0 || day > DAYS[month])
return false
if (month == 2 && day == 29 && !isGregorianLeapYear(year)) {
return false
}
int hour = Integer.parseInt(date.substring(11, 13))
if (hour < 0 || hour > 23)
return false
int minute = Integer.parseInt(date.substring(14, 16))
if (minute < 0 || minute > 59)
return false
int second = Integer.parseInt(date.substring(17, 19))
if (second < 0 || second > 59)
return false
} catch (Exception e) {
e.printStackTrace()
return false
}
return true
}
public static final boolean isGregorianLeapYear(int year) {
return year % 4 == 0 && (year % 100 != 0 || year % 400 == 0)
}
public static void main(String[] args) {
System.out.println(isValidDate("2100-02-29 23:00:01"))
}
String javaFileName="aaaaaaaaaaerwoeiroiwj.java"if(javaFileName.toLowerCase().endsWith(".java")){
System.out.println(javaFileName+" 是JAVA文件名")
}else{
System.out.println(javaFileName+" 不 是JAVA文件名")
}