I am using the Jackson for the Deseilization of the JSON. The Deseilization works perfectly for a JSON with CustomerDocument. However, I have a new requirement in which I need to find whether provided JSON has CustomerDocument or just Customer. I am able to develop the logic for both but the problem is that w…
Tag: jackson
JSON data mapping in Java with Jackson
I got stuck in mapping a json into my data structures “the easy way” using just Jackson decorators and I was wondering if there is a way to do this … The json that I try to read has the following structure: So basically every data entity has a “data_info” object (mapped in my cod…
How to Serialise a JSON String to a JAVA Object using Jackson
I am having trouble in deserialising the below JSON String to a Java Object. The code below should work but i think my issue is with the mapper i am passing with it – The mapper i pass with it is like below : Alert.java AlertConfig.java JobConfig.java Error i get is : I am nor sure how to name the
Deserializing json to pojo where json field has different data types
I’m trying to deserialize json to java pojo and I can’t wrap my head around how should I begin to create a java object that could be used to deserialize json like this: I’m working with jackson and looking to use something like this: MyPojo response = mapper.readValue(jsonString, MyPojo.clas…
How can have springdoc-openapi use the @JsonValue enum format without changing toString?
I have a Spring Boot application using springdoc-openapi to generate Swagger API documentation for my controllers. One of the enums used in the JSON request/response has a different JSON representation than its value/toString(). This is achieved using the Jackson @JsonValue annotation: However, the generated …
Jackson conflicting setters, even with @JsonIgnore and @JsonProperty
I’m at a complete loss here. I have a class with overloaded setters for a property, and for the life of me cannot get Jackson to pick a correct setter. Stripping out the things not needed from the class, here’s the base of what I’ve got: I have tried every combination I can think of of @Json…
How do I globally enable “strict” handling of LocalDate values using Jackson?
Jackson Java 8 Date/time module issue jackson-modules-java8#212 mentions enabling “strict” handling via a global default: Currently LocalDateDeserializer automatically accepts non-standard format where time part also exists. While this is useful for some use cases, compatibility, it seems reasonab…
How to map a CSV to Object with List using CsvMapper?
I’m trying to map a Csv file to an Object what instances List of Objects using CsvMapper, is that even possible? Example: Content of Csv file (without header): Field 1: name Field 2: gender Field 3: hobby (List comma separated) Field 4: relation Example class: Thank you in advance. Answer I found myself…
Getting NullPointerException while trying to deserialize json
I am getting NullPointerException while trying to deserialize json. I am trying to deserialize only select JSON objects from https://api.covid19india.org/data.json I have written code Statewise.java calling method Please help Answer The JSON returned contains “statewise” property. So to get it des…
Copy all values List to Jackson JsonGenerator Array directly instead of looping over it
I am creating a JSON file using the Jackson JsonGenerator for which I need to add the elements from List<String>. This List consists of the JSON Fragments which needs to be added to my final JSON file. As of now, I am looping over the List<String> and adding them to my Jackson JsonGenerator writeR…