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Validate Date in the request body

I have a request body have date field and I want to validate the input of the date and return error code 400 BadRequest if the format is wrong.
If I use the JsonFormat then it throws error 500:
#JsonFormat(shape=JsonFormat.Shape.STRING, pattern="yyyy-MM-dd")
private Date dateAt;
So I changed the field to String and then parse and throw BadRequest format everywhere using the getDate()
I am not really satisfied with this approach. Is there any other elegant way to achieve this validation?
I think I will accept error 500 from JSON formatter and skip my custom exception.

Since Java 8, you should avoid using Date. Java 8 brought an entirely new date and time API.
According to your question, a suitable replacement for Date would be LocalDate, which is expected to be in the format yyyy-MM-dd.
Jackson has a module supporting the new date and time API and an exception will be thrown if the date is not in the correct format. When serializing, you want to make sure the WRITE_DATES_AS_TIMESTAMPS feature is disabled, so the values will be written according to the ISO 8601 format.

How to parse string to date format in java

I have a file file_20201013_012417.txt and I want to validate the timestamp 20201013_012417 format of this file is YYYYMMDD_HHmmSS.
I have tried SimpleDateFormat , but getting java.text.ParseException: Unparseable date execption.
Any help is appreciated.

As I known, you can try to edit the concurrency number for your pipeline at the last step of creating.
Please see the figure below.

Talend timestamp - Getting a zero value instead of timestamp

I am converting string to date using a tConvertType component in Talend.The data(source is in String) is getting loaded when I do the date pattern yyyy-mm-dd but when I try with timestamp yyyy-MM-dd HH:mm:ss then I am getting an error. The data from the source has the timestamp but then I am getting an error.
For Eg : I have the source as 2015-09-03 14:14:90 , since data is in string so used tconverttype and then for destination the data type is date. But if I use timestamp then I am getting an error of Unparseable date and if I change to yyyy-mm-dd then the data is coming as 2015-09-03 00:00:00 which is wrong

try
convert(timestamp,expression)
i had the same problem in the past and convert fixed that

Using the type date and date format "yyyy-MM-dd' 'HH:mm:ss" it works fine
I recommand you to use date format by pressing Ctrl+space and choose from the list.

How to parse this date?

I want to parse below date in Java,
2012-11-29T09:15:00.002-08:00
Which date format I have to use to parse it?

java.text.SimpleDateFormat will parse it.

Actually, this format is an XSD date format, and the simplest way to parse it (without any use of an external library) is to use DataTypeConverter.parseDateTime(String lexicalXSDDateTime) in the javax.xml.bind package. This will return you a java.util.Calendar object, which you can retrieve a Date using Calendar.getTime().
Alternatively, there are solutions on SO that speaks about the same formatting, such as: What's the best way to parse an XML dateTime in Java?
enter link description here.
I hope this helps.
Using Date format as "yyyy-MM-dd'T'HH:mm:ss.SSSz"
E.g.:
String string = "2012-11-29T09:15:00.002-08:00";
Date date = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ssSSSz", Locale.ENGLISH).parse(string);
System.out.println(date);

JSON parse date and time?

Im having a little issue with parsing json date.
Here is what I would like to parse:
{"driver": "247","firstName": "XXXXX","lastName": "XXXXX","lastLatitudeUpdate": "5/21/2012 4:49:17 PM","suspended": "false","checkedin": "0"}
I am having trouble parsing "lastLatitudeUpdate" is it because there are spaces in between? Thanks in advance for the help.

Assuming you are on Android and therefore working with java (yes you don't mention that, only the tag in your question suggests it...)
Like mentioned here (and in various other places) you can parse a date in java using the SimpleDateFormat class:
SimpleDateFormat parserSDF=new SimpleDateFormat("M/d/yyyy h:m:s a");
Date d = parserSDF.parse(dateField,0);
Of course you have to first parse you json input with some library (e.g. standard library from json.org or Google gson) and then parse the string you'll get there for the field into a date.

Short answer: No, there is no way for the JSON engine to recognize a string as a Date object.
Long answer:
There is no 'date' type in JSON. However, this JSON is fine, the catch is that lastLatitudeUpdate will be parsed as a string. In order to convert this to a date you should try something like
var my_object= JSON.parse({"driver": "247","firstName": "XXXXX","lastName": "XXXXX","lastLatitudeUpdate": "5/21/2012 4:49:17 PM","suspended": "false","checkedin": "0"});
my_object.lastLatitudeUpdate= Date.parse(my_object.lastLatitudeUpdate)
This function will give a timestamp. However, you have to make sure the string is correctly recognized, you may have to do some extra work.

Some links for hints
http://docs.oracle.com/javase/1.4.2/docs/api/java/text/SimpleDateFormat.html
http://www.java-samples.com/showtutorial.php?tutorialid=406

How are you parsing the date? In Chrome this seems to work fine:
new Date("5/21/2012 4:49:17 PM");
Mon May 21 2012 16:49:17 GMT-0400 (US Eastern Daylight Time)