baseform.java

这是一个基于Java的网络书店系统

package com.netshop.web.struts.form;

import java.util.ArrayList;
import java.util.List;

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;

public class BaseForm extends ActionForm {

    /* Public Methods */

    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);
        }
    }
}