Can Jackson be configured to trim leading/trailing whitespace from all string properties?

Question

Example JSON (note that the string has trailing spaces):

{ \"aNumber\": 0, \"aString\": \"string   \" }

Ideally, the deserialised instance

Answer 1

With a custom deserializer, you could do the following:

 
 @JsonDeserialize(using=WhiteSpaceRemovalSerializer.class)
 public void setAString(String aString) {
    // body
 }

 
 public class WhiteSpaceRemovalDeserializer extends JsonDeserializer {
     @Override
     public String deserialize(JsonParser jp, DeserializationContext ctxt) {
         // This is where you can deserialize your value the way you want.
         // Don't know if the following expression is correct, this is just an idea.
         return jp.getCurrentToken().asText().trim();
     }
 }

This solution does imply that this bean attribute will always be serialized this way, and you will have to annotate every attribute that you want to be deserialized this way.