I have more than one class that I want to serialize using Jackson to generate Json, for example I need to encode all value of the json to base64, so I configure the object mapper like this The problem is it’s only encode the String type as the serializer only accept one type, is there any method to enco…
Tag: jackson
Jackson ObjectMapper returns null when Object variable is set to Private
I am given this escaped JSON and I need to convert it to Java object using Jackson. I created the class: Then I created the method to convert it Whichever variables in Data class that are set to public, then I will get the corresponding value when I call getters. Whichever variables in Data class that are set…
Serializing a double property as string
Which @JsonXyz annotation do I have to use when I have a bean to be jsonified but serializing a double proeprty as string. An example: I have a bean: And I wan tto have a JSON like: instead of: So, the value 100.0 shall be in quotes. Answer If you are using Jackson you can use @JsonSerialize and ToStringSeria…
Deserialize JSON date format to ZonedDateTime using objectMapper
Background I have the following JSON (message from Kafka) I have the following (JSON schema generated) POJO (I cannot change the POJO as it is shared resource in the company) Our application is a Spring Boot application which reads the JSON message (1) from Kafka using Spring Cloud Stream and uses the POJO (2…
org.springframework.web.reactive.function.UnsupportedMediaTypeException: Content type ‘text/xml;charset=UTF-8’ not supported for bodyType
using Java 11, SpringBoot 2, WebFlux, WebClient and Jackson trying to use Spring WebClient to consume a Web service endpoint that returns XML, content type: ‘text/xml;charset=UTF-8’ Jackson XML dependency in the project’s pom.xml: WebClient code that triggers a request to external API and bu…
How to print only the header into a string in Jackson CSVMapper
I am using Jackson CSVMapper to read a tab separated text file into a list of java objects, and write it back into another tab separated text file. My class looks like this: Parser code: Writer code: I want to extract just the header irrespective of the data. So, should return How can I do it? Thanks! Answer …
Jackson XML marshal error when XmlAttribute and XmlElement have the same name
Jackson XML appears not to be able to marshal a XML having a tag with a certain attribute whose name is also being used for the nested children tags (“occ”, in the following case). Changing the name of the XmlAttribute “occ” or of the XmlElement “occ” makes it work. This is…
How to catch a @JsonFormat exception in spring and handle it gracefully to process the payload?
I have a spring app in which I am using the @JsonFormat annotation to deserialize a date format. But when I sent an array of elements my entire payload fails even if one of the entries have an invalid date. Is there a way I can surpass this by gracefully handling this exception, by either replacing the failed…
Getting null values while mapping a JSON to POJO
I am trying to map a JSON to POJO using Jackson. However, as this JSON contains a nested map of objects, when i de-serialize it to the POJO, the timeseries information is not converted to the POJO. I am only able to get the metadata part and the date part in the timeseries block. The other fields in the times…
How to use Jackson to deserialize external Lombok builder class
I have a 3rd party Lombok builder POJO, one that I cannot modify, that I want to serialize using jackson. Notably it does not have a NoArgsConstructor. On the surface this would appear to be simple, but it is incredibly frustrating in practice as each possible option seems to be counteracted by a different co…