Json integer value automatically converts to string value

Question

When I send JSON request with integer value, it gets converted to string on the Java side automatically where the accepting field is of String type. I am using Jersey Jackson API for JSON handling. e.g.,

JSON request:

{
   "executable":1
}

Here I am sending integer value to string type executable variable. But it is accepting the integer value and converting it to string.

What my requirement is strict validation for data types.

You are sending a JSON String. So everything in that JSON is on String. You can convert that to int in JAVA side. — Anoop LL
– Anoop LL, Commented May 5, 2016 at 6:40
Is there any way of this validation without explicit type conversion on the JAVA side? — Shobhit Ranjan
– Shobhit Ranjan, Commented May 5, 2016 at 6:43
Yeah you can create an Entity depending on your JSON and you can use ObjectMapper(for eg) , which wil convert your json to the entity. No need to use any conversion. — Anoop LL
– Anoop LL, Commented May 5, 2016 at 6:45

Community · Accepted Answer · 2017-05-23 12:33:53Z

1

All values of a json object are strings. You need to cast it yourself.

Integer.valueOf(STRING_YOU_WANT_TO_CONVERT);

You can use JsonDeserializer as well. There is a example here:Error in Android JsonDeserializer when returning response

edited May 23, 2017 at 12:33

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answered May 5, 2016 at 6:45

Alikbar

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3 Comments

Shobhit Ranjan Over a year ago

True but I need validation of the json string sent.

Alikbar Over a year ago

Hhmm you can validate in both ways. What do you mean by validating by schema?

Shobhit Ranjan Over a year ago

I mean is there a way to fail the validation if an integer value is passed in the JSON request which is mapped to a string value in Java POJO class?

Shobhit Ranjan · Accepted Answer · 2016-06-27 05:06:41Z

0

Finally I could make changes according to my requirements. My requirement was to validate the JSON request against the JSON schema. It is true that JSON request comes as string so I cannot validate directly, so I accept the request as string and validate against schema using json-schema-validator.

answered Jun 27, 2016 at 5:06

Shobhit Ranjan

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