basicform.java

一个简易的网上书店（jsp+sqlservler+struts）。

package com.webshop.forms;

import javax.servlet.http.HttpServletRequest;
import org.apache.struts.action.ActionError;
import org.apache.struts.action.ActionErrors;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionMapping;
import javax.servlet.http.*;
import java.util.*;

/**
 * Form bean for a Struts application.
 * @version 	1.0
 * @author
 */
public class BasicForm extends ActionForm {

	
	public ActionErrors validate(ActionMapping mapping, HttpServletRequest request)
	{
		ActionErrors actionErrors = null;
	    ArrayList errorList = new ArrayList();
	    doValidate(mapping, request, errorList);
	    request.setAttribute("errors", errorList);
	    if (!errorList.isEmpty()) {
	      actionErrors = new ActionErrors();
	      actionErrors.add(ActionErrors.GLOBAL_ERROR, new ActionError("global.error"));
	    }
	    return actionErrors;

	}
	
	public void doValidate(ActionMapping mapping, HttpServletRequest request, List errors) {}

  /* Protected Methods */

  protected void addErrorIfStringEmpty(List errors, String message, String value) {
    if (value == null || value.trim().length() < 1) {
      errors.add(message);
    }
  }

}