java - 从数据库中检索值。如何从Action类设置为Action Form和JSP？

Question

我在jsp中有复选框。我想根据从数据库检索的值设置其值。

我已经检索了操作类中的值，但无法将该值从操作类设置到 jsp 页面。

我是新手。谁能告诉我如何做到这一点。

JSP:

    <html:form action="faxDownloadSettings">
    <html:hidden property="checkMe"/>
    <input type=checkbox name="pdf" property="checkMe" checked="checked"> <bean:message key="com.console.asPDF"/>
    <console:button name="save" script="save();">
    <console:label><bean:message key="com.console.save"/></console:label>
    </console:button>

行动形式:

    public class FaxDownloadSettingsForm extends ActionForm {


    private boolean checkMe;

    public void setCheckMe(boolean checkMe){
                    this.checkMe = checkMe;
            }

            public boolean getCheckMe(){
                    return checkMe;
            }
    }

Action 类:

    public class FaxDownloadSettingsAction extends Action {

    public ActionForward execute(ActionMapping mapping,
                            ActionForm actionForm, HttpServletRequest request,
                            HttpServletResponse response)
                                            throws Exception {

     FaxDownloadSettingsForm form = (FaxDownloadSettingsForm) actionForm;

      boolean isFaxtopdf = enumResponse.getFaxtopdf();

      request.setAttribute("checkFax", isFaxtopdf);

      form.setCheckMe(true); //It also not works    

    }

return mapping.findForward("success");


    }

Answer 1

在操作的执行方法中，在请求级别设置属性，例如:

request.setAttribute("vehicleSelected", getVehicleFromDB());

在你的jsp中，你可以这样做:

<input type="checkbox" name="vehicle" value="${vehicleSelected}"/>