我的 Struts2 Action 类如下所示,我希望 actionerror 消息应该使用标记显示在我的 JSP 页面中:<s:actionerror />
但是消息没有显示,我发现如果我将getModel()
方法更改return form;
为return null;
,错误消息可能会再次显示!如何在getModel()
方法中返回表单对象的同时显示错误消息?
public class StartSearchApplicationAction
extends ActionSupport
implements ModelDriven, SessionAware {
protected Map<String, Object> session;
private Formbean form;
public String execute() {
addActionError("Testing Error Message");
session.put("form", form);
return "success";
}
public Formbean getModel() {
form = (Formbean) session.get("form");
if (form == null) {
form = new Formbean();
}
return form;
}
public void setSession(Map<String, Object> session){
this.session = session;
}
}
更新于 2015 年 10 月 20 日 - 我的 JSP(它是瓦片模板页面)
请注意,即使我将语句更改<s:if test='%{#session.hasError == "Y"}'>
为<s:if test="hasActionErrors()">
,结果也是一样的
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<%@ page language="java" %>
<%@ page contentType="text/html; charset=UTF-8" %>
<%@ page errorPage="/jsp/error.jsp" %>
<%@ taglib prefix="s" uri="/struts-tags"%>
<%@ taglib uri="http://tiles.apache.org/tags-tiles" prefix="tiles"%>
<html>
<head>
<title><s:text name="global.heading.title"/></title>
</head>
<body>
<table class="main" border="0" cellspacing="0" cellpadding="0">
<tr>
<td>
<table border="0" cellspacing="0" cellpadding="0">
<tr>
<td width="860" valign="top" bgcolor="#FFFFFF">
<table border="0" valign="top" align="left">
<s:if test='%{#session.hasError == "Y"}'>
<tr>
<table width="500" border="0" cellspacing="0" cellpadding="2" align="center" bgcolor="#006600">
<tr>
<td width="16" class="ErrorMessageBoxTitle"><img src="/<s:text name="global.system.root"/>/images/smessage.gif" width="16" height="14" align="absmiddle" alt="System Errors"></td>
</tr>
<tr>
<td colspan="2" class="FixTdSize">
<table width="496" border="0" cellspacing="0" cellpadding="0" bgcolor="#FFFFFF">
<tr>
<td align="center" class="FixTdSize">
<table border="0" cellspacing="12" cellpadding="0" width="480">
<tr>
<td width="35" class="ErrorMessageTitle"><img src="/<s:text name="global.system.root"/>/images/messager.gif" width="31" height="31" alt="System Errors"></td>
<td class="ErrorMessageTitle" width="409"> </td>
</tr>
<tr>
<td width="35" class="ErrorMessageBody"> </td>
<td class="label" width="409"><font color=red><s:actionerror/></font></td>
</tr>
</table>
</td>
</tr>
</table>
</td>
</tr>
</table>
</tr>
<tr><td> </td></tr>
</s:if>
<tr>
<td height="30"><tiles:insertAttribute name="searchpanel"/></td>
</tr>
<tr>
<td><img src="/<s:text name="global.system.root"/>/images/line.gif" width="100%" height="2"></td>
</tr>
<tr>
<td><tiles:insertAttribute name="message"/></td>
</tr>
<tr>
<td><tiles:insertAttribute name="body"/></td>
</tr>
</table>
</td>
</tr>
</table>
</td>
</tr>
</table>
</table>
<tiles:insertAttribute name="menu"/>
</body>
</html>