com.fasterxml.jackson.databind.JsonMappingException: Can not deserialize out of START_ARRAY token

Sachin S Rao

I'm getting START_ARRAY error for following model. I'm expecting object of InputDetails

class InputDetails{
  public List<EachFieldDetails> fieldDetails;
}

class EachFieldDetails{
  public String fieldName;
  public String value;
}

JSON input is as follows:

[{"fieldName":"siteName","value":"Warehouse"},{"fieldName":"poNumber","value":"po1"},{"fieldName":"itemCode","value":"itemcode1"},{"fieldName":"asdnSerialNo","value":"null"}]

Can someone provide me the solution.

Here is my class

public Response setWHDetails(@BeanParam RequestBean requestBean,InputDetails saveInputs)
{ 
  //Do operation   
}
Baldy

Your JSON specifies an array while you're trying to deserialize into an object.

if your JSON was like:

{
    "fieldDetails" : [
        {"fieldName":"siteName","value":"Warehouse"},
        {"fieldName":"poNumber","value":"po1"},
        {"fieldName":"itemCode","value":"itemcode1"},
        {"fieldName":"asdnSerialNo","value":"null"}
    ]
}

It would probably work. Alternately, you could deserialize directly into an array.

I say probably because you haven't provided any code or information of what tool or library you're using to handle the deserialization process.

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