JAXB Unmarshalling XML string - Looping through all tags

Question

I am new to Java programming and I am doing Unmarshalling the following XML string. My task is get the names of the customers in this string. I have done it for one customer. I

Answer 1

Here is a revision of you Java classes Data and Customer, plus some code to unmarshal:

@XmlRootElement  
public class Response {
  @XmlElement
  private Data data;
  public Data getData(){ return data; }
  public void setData( Data value ){ data = value; }
}

public class Data {    // omitted namespace="data" as it isn't in the XML
  @XmlElement(name = "customer")
  private List customer;          // List is much better than array
  public List getCustomer (){
    if( customer == null ){
      customer = new ArrayList<>();
    }
    return customer;
  }
}

@XmlType(name = "Customer")
public class Customer {
  private String name;         // stick to Java conventions: lower case
  public String getName (){
    return name;
  }
  public void setName( String value ){
    name = value;
  }
}

JAXBContext jc = JAXBContext.newInstance( Response.class );
Unmarshaller m = jc.createUnmarshaller();
Data data = null;
try{
  // File source = new File( XMLIN );
  StringReader source = new StringReader( stringWithXml ); // XML on a String
  data = (Data)m.unmarshal( source );
  for( Customer cust: data.getCustomer() ){
    System.out.println( cust.getName() );
  }
} catch( Exception e  ){
  System.out.println( "EXCEPTION: " + e.getMessage() );
  e.printStackTrace();
}

Not sure why you use an XMLStreamReader, but you can change this if you like.