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How to bind Integer with leading zeros to an Integer field in request payload in Spring boot?

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However, expMonth is not binding properly and throws an exception. Please suggest the way forward.

Exception Stack:

org.springframework.http.converter.HttpMessageNotReadableException: JSON parse error: Invalid numeric value: Leading zeroes not allowed; nested exception is com.fasterxml.jackson.core.JsonParseException: Invalid numeric value: Leading zeroes not allowed at [Source: (PushbackInputStream); line: 4, column: 16]

Could you include the stack trace and your implementation? It's hard to tell what's going wrong without looking at the trace. – user2004685 Jun 25, 2019 at 18:08 org.springframework.http.converter.HttpMessageNotReadableException: JSON parse error: Invalid numeric value: Leading zeroes not allowed; nested exception is com.fasterxml.jackson.core.JsonParseException: Invalid numeric value: Leading zeroes not allowed at [Source: (PushbackInputStream); line: 4, column: 16] – Sumanth Varada Jun 25, 2019 at 18:12

As per the exception stack, you have leading zeros and hence Jackson is thrwing the exception. You can either try something like,

"name": "XXXX", "expMonth": 7, <--- Removing the leading zero(s). "expYear": 21

Another way is to change it to String instead,

"name": "XXXX", "expMonth": "07", "expYear": 21

Code:

public Class Card {
     private String name;
     private String expMonth;
     private Integer expYear;
You can then do something like,
Integer.parseInt(expMonth);
                I know that String is an easy option. However, this payload has to send to someother api. I just want to avoid the conversion. I'm using ObjectMapper here.
– Sumanth Varada
                Jun 25, 2019 at 18:24
                @SumanthVarada A leading 0 indicates an octal number. Hence, leading zeros are not allowed for numeric values in JSON. See this
– user2004685
                Jun 25, 2019 at 18:29
        
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