How to change a field name in JSON using Jackson

Question

I m using jackson to convert an object of mine to json  The object has 2 fields    Entity public class City       id    Long id     String name     public String getName     return name       public void setName String name   this name   name       public Long getId     return id       public void setName Long id   this id   id        Since I want to use this with the jQuery auto complete feature I want  id  to appear as  value  in the json and  name  to appear as  label   The documentation of jackson is not clear on this and I ve tried every annotation that even remotely seems like it does what I need but I can t get name to appear as label and id to appear as value in the json   Does anyone know how to do this or if this is possible

User · Answer

Be aware that there is org codehaus jackson annotate JsonProperty in Jackson 1 x and com fasterxml jackson annotation JsonProperty in Jackson 2 x  Check which ObjectMapper you are using  from which version   and make sure you use the proper annotation

User · Answer

Have you tried using  JsonProperty    Entity public class City       id    Long id     String name       JsonProperty  label      public String getName     return name        public void setName String name   this name   name         JsonProperty  value      public Long getId     return id        public void setId Long id   this id   id

User · Answer

Jackson  If you are using Jackson  then you can use the  JsonProperty annotation to customize the name of a given JSON property   Therefore  you just have to annotate the entity fields with the  JsonProperty annotation and provide a custom JSON property name  like this    Entity public class City        Id     JsonProperty  value      private Long id       JsonProperty  label      private String name        Getters and setters omitted for brevity     JavaEE or JakartaEE JSON-B  JSON-B is the standard binding layer for converting Java objects to and from JSON  If you are using JSON-B  then you can override the JSON property name via the  JsonbProperty annotation    Entity public class City        Id     JsonbProperty  value      private Long id       JsonbProperty  label      private String name        Getters and setters omitted for brevity

User · Answer

There is one more option to rename field    Jackson MixIns   Useful if you deal with third party classes  which you are not able to annotate  or you just do not want to pollute the class with Jackson specific annotations   The Jackson documentation for Mixins is outdated  so this example can provide more clarity  In essence  you create mixin class which does the serialization in the way you want  Then register it to the ObjectMapper    objectMapper addMixIn ThirdParty class  MyMixIn class

[java] How to change a field name in JSON using Jackson

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