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 t…
Tag: json
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…
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 s…
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 [R…
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…
Jackson serializes a ZonedDateTime wrongly in Spring Boot
I have a simple application with Spring Boot and Jetty. I have a simple controller returning an object which has a Java 8 ZonedDateTime: In my RestController I simply have: I was expecting the ZonedDateTime to be formatted according to the ISO format, but instead I am getting a whole JSON dump of the class li…
How to ignore “null” or empty properties in json, globally, using Spring configuration
I’m trying to return only the properties that have values, but the null ones are also being returned. I know that there’s an annotation that does this ( @JsonInclude(Include.NON_NULL) ), but then I need these in every single entity class. So, my question is: Is there a way to configure this global…
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 …