package com.lib.actionform;import org.apache.struts.action.*;import javax.servlet.http.*;import java.util.List;import com.lib.util.FillDataUtil;import com.lib.vo.Book;import java.util.ArrayList;public class BookActionForm extends ActionForm {  private List users = new FillDataUtil(Book.class);  private ArrayList types = new ArrayList();  private java.util.List readers = new ArrayList();  private String operation;  private Long deleteUID = null;  public BookActionForm()  {    operation = "display";  }  public ActionErrors validate(ActionMapping actionMapping, HttpServletRequest httpServletRequest) {    /**@todo: finish this method, this is just the skeleton.*/    return null;  }  public void reset(ActionMapping actionMapping, HttpServletRequest httpServletRequest) {  }}