Java EE (Java Enterprise Edition) General Discussion

I have created a webservice using NetBean IDE and have Sun Application Server 9.1.

when i am testing service using Test option in admin console I am getting following error ;

Service invocation threw an exception with message : null; Refer to the server log for more details

The server log file shows following errors;

Caused by: javax.xml.bind.JAXBException: class data.emp nor any of its super class is known to this context.
at com.sun.xml.bind.v2.runtime.XMLSerializer.reportError(XMLSerializer.java:242)
at com.sun.xml.bind.v2.runtime.XMLSerializer.reportError(XMLSerializer.java:257)
at com.sun.xml.bind.v2.runtime.XMLSerializer.childAsXsiType(XMLSerializer.java:649)
at com.sun.xml.bind.v2.runtime.property.ArrayElementNodeProperty.serializeItem(ArrayElementNodeProperty.java:65)
at com.sun.xml.bind.v2.runtime.property.ArrayElementProperty.serializeListBody(ArrayElementProperty.java:168)
at com.sun.xml.bind.v2.runtime.property.ArrayERProperty.serializeBody(ArrayERProperty.java:152)
at com.sun.xml.bind.v2.runtime.ClassBeanInfoImpl.serializeBody(ClassBeanInfoImpl.java:322)
at com.sun.xml.bind.v2.runtime.XMLSerializer.childAsXsiType(XMLSerializer.java:681)
at com.sun.xml.bind.v2.runtime.MarshallerImpl.write(MarshallerImpl.java:277)
... 40 more

I have used following class ,

package data;
import java.io.Serializable;

public class emp implements Serializable {
public String empnm;
public String empid;
public emp(String empid, String empnm) {
this.empid=empid;
this.empnm=empnm;
}
}



and my webservice class is as follows,


package data;

import java.util.ArrayList;
import javax.jws.WebMethod;
import javax.jws.WebService;
import java.sql.*;

@WebService()
public class empDataService {


@WebMethod
public ArrayList show() {

ArrayList<emp> empArray = new ArrayList<emp>();
Connection con;
ResultSet rs;
Statement stmt;
try
{
Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
con = null;
con = DriverManager.getConnection("jdbc:odbc:EMPINFO");
stmt = con.createStatement();
rs = stmt.executeQuery("select * from emp");
while(rs.next())
{
//emp obj=new emp();
//obj.empid=rs.getString(1);
//obj.empnm=rs.getString(2);
empArray.add(new emp(rs.getString(1),rs.getString(2)));
}

}
catch(Exception e)
{

}
return empArray;
}

}


Will any one please reply me what the cause and solution ..