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Tag: jackson-databind

JsonMappingException when reading the response from RestTemplate

Seeing the exception when I call the GET method in RestTemplate com.fasterxml.jackson.databind.JsonMappingException: N/A at [Source: (StringReader); line: 1, column: 13700] (through reference chain:[“issues”]->java.util.ArrayList[0]->[“fields”]) the sample java code is java classses are and the Issue class definition is How do I fix this JsonMappingException? Answer You are trying to serialize the result of a method that returns void. Also, I

How to write common pojo deserializer for json attribute which can be an object and an array both?

Background: I am getting mismatchedInputException, when parsing json. com.fasterxml.jackson.databind.exc.MismatchedInputException: Cannot deserialize value of type java.util.ArrayList<Data> from Object value (token JsonToken.START_OBJECT) Problem: nodes is a json-array which contains data, which can be either json-object or json-array . I need to represent this correctly in POJO. Things Tried: Map<String, Object>, List, ,@JsonDeserialize(using = NodeDeserializer.class) Below is my nested json document for ref.

How to deserialize JSON with @JsonCreator and @JsonGetter

I have the JSON looks like the following: and I have a class Person: I need to deserialize and serialize it, but when I’m trying to deserialize this JSON I get unexpected result. Why when I’m trying to deserialize it the @JsonGetter annotation is used for it? How can I disable @JsonGetter annotation when I try to deserialize the JSON?

Setter in DTO just for integration testing?

I couldn’t find the info I’m looking for hence posting here for suggestion and getting to know better approach. I have an immutable DTO object like: Now I’m working on an integration test with testcontainer where I want the accountOpeningDate and installmentPaidDate to be dynamic value hence in order to set these values from Integration Tests, is it a good

How to read value from JSON with Jackson Java

I have a JSON file: I want to get the items separately. I try to do, but the result did null: This is class for Items: What I do wrong? how correctly read value from items? Answer You didn’t handle the JSON array – items – properly, so as I commented under OP, all what you need to do is

Different @JsonProperty config for READ and WRITE on same field?

I have a class (which cannot be modified) like When deserializing I get data like: As I cannot modify the Standing class I have a mix-in like: As the received json does not have positionNumber and positionText fields I use the @JsonPropery annotations. With Access.READ_ONLY I simply ignore the positionNumber field. And with @JsonProperty(value = “position”, access = JsonProperty.Access.WRITE_ONLY) on