Question

I’m having following method in my resource class for a REST service in Java.

@POST
@Consumes({MediaType.APPLICATION_XML, MediaType.APPLICATION_JSON})
@Produces({MediaType.APPLICATION_XML, MediaType.APPLICATION_JSON})
public Player createCustomer(Customer customer)
{
    System.out.println("Request for Create");

    System.out.println(""+customer.getID()+"\n"+customer.getTableID()+"\n"+customer.getCustNick());

    //Above statement should print the details I send via JSON object

    //return custdao.create(customer); //Want to call this to add new "customer"  into database table.

    return player;
}

And following the jQuery method I call when input fields in the form are filled and create button is clicked.

function createEntry() {
        var formData = JSON.stringify({
            "ID" : $("input[name='txtID']").val(),
            "tableID" : $("input[name='txtTableID']").val(),
            "custNick" : $("input[name='txtNick']").val()
        });

        console.log(formData); //Just to see if form details are JSON encoded.

        $.ajax({
            type: "POST",
            contentType: "application/json",
            url: baseURL,
            dataType: "json",
            data: formData,
            success: function(data) {
                console.log("Customer Added!");
                $("div.response").append("<h3>New Customer ("+ $("input[name='txtNick']").val() +") Added on the Server</h3>");
            }
        });
    }

But on server, I’m getting empty “customer” object, what am I doing wrong here? Please let me know if you need any further details (regarding Customer class model).

Update: Following is Customer class.

/*ignore imports, all required imports are included */

@XmlRootElement
public class Customer
{
    private int id;
    private int tableid;
    private String custnick;

    public int getID()
    {
            return id;
    }

    public void setID(int id)
    {
            this.id = id;
    }

    ....
    ....
    /* Similar Setter-Getter Methods for the fields */
}

I guess the problem has something to do with XML schema of my “Customer” class and the node names I send in JSON object is not matching with schema that’s why it may not be able to map fields with setter methods of my model class, not sure though.

Answer 1

The problem is probably caused by a field name mismatch.

You can use the @XmlElement JAXB annotation on your entity class to set whatever names you want for your fields to make it all clear. Just follow this link: http://jaxb.java.net/tutorial/section_6_2_7_1-Annotations-for-Fields.html#Annotations%20for%20Fields