Duplicate Values while using ObjectMapper of Jackson

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My Bean class is as below. When the mapping happens, the JSON object contains duplicate values.

Response:

{"Id":"00PJ0000003mOgMMAU","Name":"web.xml","name":"web.xml","id":"00PJ0000003mOgMMAU"}

Why the values are getting duplicated?

import org.codehaus.jackson.annotate.JsonIgnoreProperties;
import org.codehaus.jackson.annotate.JsonProperty;
@JsonIgnoreProperties(ignoreUnknown = true)
public class AttachmentsMapper
{
    @JsonProperty(value = "Id")
    private String Id;

    @JsonProperty(value = "Name")
    private String Name;


    public String getId() {
            return Id;
        }
    public void setId(String Id) {
        this.Id = Id;
    }
    public String getName() {
        return Name;
    }
    public void setName(String Name) {
        this.Name = Name;
    }

}
jackson duplicates java
2 Answers

In Jackson 2 try to disable Jackson visibility for all the sources (getters, setters, fields, etc.) and then just enable the visibility for the object fields:

import com.fasterxml.jackson.annotation.JsonAutoDetect;
import com.fasterxml.jackson.annotation.PropertyAccessor;
import com.fasterxml.jackson.databind.ObjectMapper;   

...

ObjectMapper mapper = new ObjectMapper();    
mapper.setVisibility(PropertyAccessor.ALL, Visibility.NONE);
mapper.setVisibility(PropertyAccessor.FIELD, Visibility.ANY);
user_42513910
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