spring JPA java.sql.Date is accepting invalid Dates - mysql

Question

I am writing rest apis for my project to create, retrieve and modify values to my database.
The model has an sql.Date field which while doing POST request if I give date as for example 2018-01-35(yyyy-MM-dd), it is auto converting to 2018-02-04.
I want to avoid this so that it can tell me that the given date is invalid.
I searched in SO and tried this approach,
#DateTimeFormat(pattern = "yyyy-MM-dd")
private Date dob;
but this did nothing, so then I tried another method
#JsonFormat(shape= JsonFormat.Shape.STRING, pattern="yyyy-MM-dd")
but this only checks for format like if i give value as just "1993", it gives error but does not check for "1993-01-35".
I also tried,
public static boolean dateChecker(Date date){
Calendar calendar = Calendar.getInstance();
calendar.setLenient(false);
calendar.setTime(date);
try{
calendar.getTime();
}catch(Exception e)
{
System.out.println(e.getMessage());
return false;
}
return true;
}
But when I debug it, this method is already getting "1993-01-35" as "1993-02-04".
The model is,
#JsonFormat(shape= JsonFormat.Shape.STRING, pattern="yyyy-MM-dd")
private Date dob;
This is my POST method,
#RequestMapping(value = "/patient",method = RequestMethod.POST,consumes = "application/json")
public ResponseEntity<?> createPatient(#RequestBody Patient patient)
{
if(patient.getPatientId()!=null)
{
Patient patient1 = patientRepository.findOne(patient.getPatientId());
if(patient1!=null)
{
return new ResponseEntity("Patient for the given patient Id already exists.",HttpStatus.BAD_REQUEST);
}
}
System.out.println(patient.getDob());//Here I am getting 1993-02-04 when i give date as 1993-01-35
Please help me solve this.

Answer 1

Try util.date package for date.

Answer 2

You could try doing something like this if the calendar.setLenient isn't working for you.
I just added some random number for the day for testing.
int day = 21;
Calendar gmtCal =
Calendar.getInstance(TimeZone.getTimeZone("GMT"));
gmtCal.set(Calendar.MONTH, Calendar.JANUARY);
if(day <= gmtCal.getActualMaximum(Calendar.DAY_OF_MONTH)){
gmtCal.set(1993, Calendar.JANUARY, day );
System.out.println(gmtCal.get(Calendar.YEAR));
System.out.println(gmtCal.get(Calendar.MONTH));
System.out.println(gmtCal.get(Calendar.DAY_OF_MONTH));
System.out.println(gmtCal.getTime());
}
else{
System.out.println("Out of bounds");
}
The First thing you would have to do is to set the month for the calendar and then do a test on the day that was entered. If it passes then then you can set the whole date and if not print out an error.
Note: when using Calendar.get, the year and day will be printed out correctly. However, the month will start at zero. So in this example the dot gets print out:
1993 (year)
0 (month)
21 (day).
Also the the sysout for getTime() will print out some extra information that you might not need.
I used this post as a reference, it might give you some extra help: Detect invalid date on Calendar.set()
I hope this helps you. Let me know if this needs tweeking