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Tag: json

Spring deserializes a LocalDate in a @RequestBody differently from one in a @RequestParam – why, and can they be the same?

QUESTION: Spring appears to use different deserialization methods for LocalDate depending on whether it appears in a @RequestBody or a request @ReqestParam – is this correct, and if so, is there a way to configure them to be the same throughout an application? BACKGROUND: In my @RestController, I have two methods – one GET, and one POST. The GET expects

Jackson error “Illegal character… only regular white space allowed” when parsing JSON

I am trying to retrieve JSON data from a URL but get the following error: My code: The url constructed is i.e https://www.example.org/api/search.json?keywords=iphone&count=50 What is going wrong here? And how can I parse this data successfully? Imports: example response Answer The message should be pretty self-explanatory: There is an illegal character (in this case character code 31, i.e. the control

Jackson adds backslash in json

I’m building REST service on Jersey and using Jackson to produce JSON from java classes of my model. Model with absolutely simple values, I think this is the most typical case. But I get strange result: My expecting result: My source values of fields does NOT contains any special characters. These are simple words. There’re my Java classes. Entity: Class

Java: FasterXML / jackson deserialize array without keys

Is there a way how to deserialize JSON array into following Java class using FasterXML jackson-databind? I only found answers where there are key: value items in the array. Answer Firstly {[“a”, “b”, 1]} is not a Valid Json Array (or JSON) …. JSON Array would look like this [“a”, “b”, 1] Also you could deserialize the Json Array into

convert java arraylist to array using for loop

I have viewed the many similar topics here, none have allowed me to resolve: The many examples I have seen all create an array list by adding in the code, I already have the arrayList. I just need to modify it as an array string and not an arrayList so that I may properly format it as a JSON string

How to use Postgres JSONB datatype with JPA?

Im not finding a way to map the JSON and JSONB datatypes from PostgreSQL using JPA (EclipseLink). Is some one using this datatypes with JPA and can give me some working examples? Answer All the answers helped me to reach the final solution that is ready for JPA and not EclipseLink or Hibernate specifically.

Can I apply a custom deserializer to within another custom deserializer for GSON

The below is a working code that helps to convert JSON in Object accordingly. If the String is nil, it will be treated as null. There’s 2 custom deserializer i.e. MyOwnStringDeserializer and MyOwnListDeserializer. I am not happy with MyOwnListDeserializer deserializer, as essentially what it is doing is in term of the String comparison to the rule defined in MyOwnStringDeserializer. But

What is the difference between ObjectNode and JsonNode in Jackson?

According to the documetation of JsonNode: Most mutators, however, need to be accessed through specific sub-classes (such as ObjectNode and ArrayNode). However I am still confused since some stackoverflow answers seem to use them quite interchangeably. What different purpose do they serve? Answer JsonNode is a base class that ObjectNode and ArrayNode extend. JsonNode represents any valid Json structure whereas

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