Java "Jackson" JsonMappingException: Can not deserialize instance of float out of FIELD_NAME token

Question

with this class:

public class Products implements Serializable {
    private BigDecimal productId;
    private float priority;

    public float getPriority() {
        return priority;
    }

    public void setPriority(float priority) {
        this.priority = priority;
    }
}

When doing deserialization of such JSON data:

{"productId":47552,"priority":78}

Got this error:

org.codehaus.jackson.map.JsonMappingException: 
Can not deserialize instance of float out of FIELD_NAME token
 at [Source: org.apache.catalina.connector.CoyoteInputStream@103cf49; line: 1, \
 column: 290] (through reference chain: entity.Products["priority"])

But for this data (quotes around priority value)

{"productId":47552,"priority":"78"}

works well, so it seems that jackson (1.9.9) does not respect numeric values ? I suspect something is wrong here.

Answer 1

You are declaring the field priority as a float type and you try to deserialize the Json which contains int value. Jackson try to call a setter function which accepts a integer value. So we need to add one setter like this.

public void setPriority(int priority){
    this.priority = Float.valueOf(priority);
}