Struts2验证，验证失败时重新填充所有字段 [英] Struts2 validation, repopulate all the fields when validation fails
本文介绍了Struts2验证，验证失败时重新填充所有字段的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我有2个页面，第一个页面是用户插入数据的页面，第二个页面是用户确认数据的页面(或可以返回到编辑页面). 问题是，当验证失败时，字段中的所有值都将被删除.有人建议使用prepare()，但是复制所有字段的工作量很大，是否存在一种更快的方法来复制字段重新填充所有字段?
I have 2 pages, the first where the user insert the data, and the second where the user confirm the data (or can go back to the edit page). The problem is that when validation fails, all the values in fields are erased. Somebody suggested to use prepare(), but It's a lot of work to copy all the fields, does it exist a faster way to repopulate all the fields?
第一页(formDatiUtente.jsp):
the first page (formDatiUtente.jsp):
<%@ page language="java" contentType="text/html;"
import="java.util.*,it.alm.bean.*,it.alm.delegate.*;"%>
<%@ taglib prefix="s" uri="/struts-tags"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<link href="${pageContext.request.contextPath}/css/stile1.css" rel="stylesheet" type="text/css" />
<title>Registrazione account</title>
<script type="text/javascript" src="${pageContext.request.contextPath}/js/scriptFormUtente.js"></script>
<script type="text/javascript" src="${pageContext.request.contextPath}/js/scriptDWR.js"></script>
<script type='text/javascript' src='/gestUtenzeLDAP/dwr/engine.js'></script>
<script type='text/javascript' src='/gestUtenzeLDAP/dwr/util.js'></script>
<script type='text/javascript' src='/gestUtenzeLDAP/dwr/interface/DwrAjaxServiceImplEnti.js'></script>
<script type='text/javascript' src='/gestUtenzeLDAP/dwr/interface/DwrAjaxServiceImplTipoUfficio.js'></script>
<script type='text/javascript' src='/gestUtenzeLDAP/dwr/interface/DwrAjaxServiceImplUfficio.js'></script>
<script type='text/javascript' src='/gestUtenzeLDAP/dwr/interface/ComboBean.js'></script>
</head>
<body>
<jsp:include page="header.jsp"/>
<s:actionerror />
<s:form name="formDatiUtente" action="inviaRichiesta.action" method="post" theme="simple" validate="true">
<%
String pathContest=request.getContextPath();
//Collection clRichAna = (ArrayList)request.getAttribute("clRichAna");
//String totRich=(clRichAna!=null?""+clRichAna.size():"0");
//Collection comuni = (ArrayList)request.getAttribute("comuni");
List <Comune> comuni = CreazioneUtenzaDelegate.getInstance().getComuni();
%>
<center>
<s:fielderror></s:fielderror>
<table width="48%" class="LISTA" border="0" cellPadding="3" cellSpacing="5" align="center">
<tr>
<td width="35%">
<p class="testodx">
<s:text name="label.cognome" />
</p>
</td>
<td align="right">
<p class="testosx">
<s:textfield name="cognome" id="idCognome"
size="30" value="%{anagraficaVDR.cognome}" />
</p>
</td>
</tr>
<tr>
<td align="right">
<p class="testodx"><s:text name="label.nome" /></p>
</td>
<td align="left">
<s:textfield name="nome" id="idNome" size="30" value="%{anagraficaVDR.nome}" />
<td>
</tr>
<tr>
<td>
<p class="testodx"><s:text name="label.dataNascita" /></p>
</td>
<td>
<s:date name="%{anagraficaVDR.dataNascita}" format="dd/MM/yyyy" var="dataFormattata" />
<s:textfield name="dataNascita" size="12"
value="%{#dataFormattata}" />
<br>
<p class="testosuggerimento">
<s:text name="label.ddmmyyyy" />
</p>
</td>
</tr>
<tr>
<td>
<p class="testodx"><s:text name="label.qualifica" /></p>
</td>
<td>
<s:select
style=" width : 207px;"
list="listaQualifiche"
listKey="idQualifica"
listValue="descrizione"
name="qualificaSelezionata"
value="%{anagraficaVDR.qualifica.idQualifica}"
/>
</td>
</tr>
<tr>
<td>
<p class="testodx"> Comune: </p>
</td>
<td>
<s:select
headerKey="-1" headerValue="Seleziona..."
style=" width : 207px;"
id="idListaComuni"
list="listaComuni"
listKey="codComune"
listValue="descrizione"
onChange="setReloadEnti()"
name="comuneSelezionato"
value="%{anagraficaVDR.ufficio.comune.codComune}"
/>
</td>
<tr>
<td>
<p class="testodx">Ente:</p>
</td>
<td>
<s:select
list="listaEnte"
listKey="idValue"
listValue="value"
name="ente"
onChange="setReloadTipoUfficio()"
id="identi"
value="%{anagraficaVDR.ufficio.tipoufficio.ente.idEnte}"
style=" width : 207px;"
/>
</td>
</tr>
<tr>
<td>
<p class="testodx">Tipo Ufficio:</p>
</td>
<td>
<s:select
list="listaTipoUffici"
listKey="idValue"
listValue="value"
name="tipoufficio"
onChange="setReloadUfficio()"
id="idtipouff"
value="%{anagraficaVDR.ufficio.tipoufficio.idTipoUfficio}"
style=" width : 207px;"/>
</td>
</tr>
<tr>
<td>
<p class="testodx">Ufficio:</p>
</td>
<td>
<s:select
list="listaUffici"
listKey="idValue"
listValue="value"
name="ufficio"
id="iduff"
value="%{anagraficaVDR.ufficio.idufficio}"
style=" width : 207px;"/>
</td>
</tr>
<tr>
<td>
<p class="testodx"><s:text name="label.telefono_Ufficio_reparto" /></p>
</td>
<td>
<s:textfield name="telefono" id="idTelefono_Ufficio_reparto" size="30" value="%{anagraficaVDR.telefono}"/>
</td>
</tr>
<tr>
<td>
<p class="testodx"><s:text name="label.email" /></p>
</td>
<td>
<s:textfield name="email" id="idEmail" size="30" value="%{emailVDR}"/>
<s:text name="label.@" />
<s:select
headerKey="-1" headerValue="Seleziona..."
list="dominiMail"
listKey="descrizione"
listValue="descrizione"
name="ilTuodominio_Email"
value="ilTuodominio_EmailVDR" />
</td>
</tr>
<tr>
<td>
<p class="testodx"><s:text name="label.confermaEmail" /></p>
</td>
<td>
<s:textfield name="confermaEmail" id="idConfermaEmail" size="30" value="%{emailVDR}" onfocus="disabilitaIncolla()"/>
<s:text name="label.@" />
<s:select
headerKey="-1" headerValue="Seleziona..."
list="dominiMail"
listKey="descrizione"
listValue="descrizione"
name="ilTuodominio_EmailConferma"
value="ilTuodominio_EmailVDR" />
</td>
</tr>
<tr>
<td>
<p class="testodx"><s:text name="label.ip" /></p>
</td>
<td>
<s:textfield name="ip" id="idIp" size="30" value="%{anagraficaVDR.ip}"/>
<br>
<p class="testosuggerimento"> <s:text name="label.testoip" /></p>
</td>
</tr>
<tr>
<td class="right">
<s:text name="label.checkbox" />
</td>
<td class="left">
<s:checkboxlist list="listaApplicazioni"
listKey="idApplicazione"
listValue="descrizione"
name="applicazioniSelezionate"
value="applicazioniSelezionateDefault"
cssStyle="vertical"/>
</td>
</tr>
</table>
<br>
<s:if test="!gestioneAmministratore">
<s:submit method="execute" cssClass="bottone" key="label.invia" align="center" />
</s:if>
</center>
</s:form>
</body>
</html>
提交到此处(visualizzaDatiRichiesta.jsp)之后，当用户返回上一页时，我使用隐藏值来复制数据(这不是我想的最好方法，但是我从a继承了部分代码同事):
That after the submit go here (visualizzaDatiRichiesta.jsp), I use hidden value to copy the data when the user go back to the previous page (it's not the best way I suppose, but I inherit part of the code from a co-worker):
<%@ page language="java" contentType="text/html;"
import="java.util.*,it.alm.bean.*,it.alm.delegate.*;"%>
<%@ taglib prefix="s" uri="/struts-tags"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<link href="${pageContext.request.contextPath}/css/stile2.css" rel="stylesheet" type="text/css" />
<title>Riepilogo dati richiesta</title>
<script type="text/javascript" src="${pageContext.request.contextPath}/js/scriptFormUtente.js"></script>
</head>
<% String pathContest=request.getContextPath();
%>
<body>
<jsp:include page="headerGenerico.jsp"/> <br><br><br>
<s:actionerror />
<s:form action="registrazione.action" method="post" theme="simple">
<s:hidden name="anagraficaVDR.cognome" value="%{cognome}" />
<s:hidden name="anagraficaVDR.nome" value="%{nome}" />
<s:hidden name="anagraficaVDR.dataNascita" value="%{dataNascita}" />
<s:hidden name="anagraficaVDR.qualifica.idQualifica" value="%{qualificaSelezionata}" />
<s:hidden name="anagraficaVDR.telefono" value="%{telefono}" />
<s:hidden name="anagraficaVDR.email" value="%{email}" />
<s:hidden name="anagraficaVDR.ip" value="%{ip}" />
<s:hidden name="comuneSelezionatoVDR" value="%{comuneSelezionato}" />
<s:hidden name="enteSelezionatoVDR" value="%{ente}" />
<s:hidden name="tipoUfficioSelezionatoVDR" value="%{tipoufficio}" />
<s:hidden name="ufficioSelezionatoVDR" value="%{ufficio}" />
<s:hidden name="anagraficaVDR.ufficio.comune.codComune" value="%{comuneSelezionato}" />
<s:hidden name="anagraficaVDR.ufficio.tipoufficio.ente.idEnte" value="%{ente}" />
<s:hidden name="anagraficaVDR.ufficio.tipoufficio.idTipoUfficio" value="%{tipoufficio}" />
<s:hidden name="anagraficaVDR.ufficio.idufficio" value="%{ufficio}" />
<s:hidden name="qualificaSelezionataDescrizioneVDR" value="%{qualificaSelezionataDescrizione}" />
<s:hidden name="descrizioneTipoUfficioEUfficioVDR" value="%{descrizioneTipoUfficioEUfficio}" />
<s:hidden name="ilTuodominio_EmailVDR" value="%{ilTuodominio_Email}" />
<s:hidden name="applicazioniSelezionateVDR" value="%{applicazioniSelezionate}" />
<s:hidden name="applicazioniSelezionateDescVDR" value="%{applicazioniSelezionateDesc}" />
<center>
<div class= "divCornicePrimoBlocco">
<table width="900" class="PRIMORIQUADRO1" border="0" cellspacing="5" cellpadding="0">
<tr>
<th align="center" colspan="2">
<h3>Riepilogo dati richiesta</h3>
</th>
</tr>
<tr >
<td>
<s:text name="label.cognome2"/><p class="testoColorato"><s:property value="cognome"/></p>
<p> .............................................................................................................................</p>
</td>
</tr>
<tr>
<td>
<s:text name="label.nome2" /><p class="testoColorato"><s:property value="nome"/></p>
<p> ..................................................................................................................................</p>
</td>
</tr>
<tr>
<td>
<s:text name="label.dataNascita2" ></s:text><p class="testoColorato1"><s:date format="dd/MM/yyyy" name="dataNascita"/></p>
<p> .....................................................................................................................</p>
</td>
</tr>
<tr>
<td>
<s:text name="label.qualifica2"></s:text><p class="testoColorato"><s:property value="qualificaSelezionataDescrizione"/></p>
<p> ..............................................................................................................................</p>
</td>
</tr>
<tr>
<td>
<s:text name="label.ufficio_Reparto_di_appartenenza2" /><p class="testoColorato2"><s:property value="descrizioneTipoUfficioEUfficio"/></p>
<p> .......................................................................................</p>
</td>
</tr>
<tr>
<td>
<s:text name="label.telefono_Ufficio_reparto2" /><p class="testoColorato2"><s:property value="telefono"/></p>
<p > .........................................................................................................</p>
</td>
</tr>
<tr>
<td >
<s:text name="label.email2" /><p class="testoColorato"><s:property value="email"/>@<s:property value="ilTuodominio_EmailDesc"/></p>
<p > .................................................................................................................................</p>
</td>
</tr>
<tr>
<td>
<s:text name="label.ip2" /><p class="testoColorato3"><s:property value="ip"/></p>
<p> ................................................................................</p>
</td>
</tr>
<tr>
<td>
<s:label>Applicativo richiesto</s:label><p class="testoColorato2"><s:property value="applicazioniSelezionateDesc"/></p>
<p > .............................................................................................................</p>
</td>
</tr>
</table>
</div><br>
<div align="right">
<s:submit value="Crea documento" class="bottoneConferma" action="stampaRichiestaPdf" onClick="javascript:creaDocumentoPdf();"/>
<s:submit id="idBottoneConferma" value="Conferma" class="bottoneConferma" action="inserisciRichiestaInDB" disabled="true"/>
<s:submit value="Modifica dati richiesta" class="bottoneModifica" action="inserimentoDati" />
</div>
</center>
</s:form>
</body>
</html>
因此，让我们传递该动作，它是相对于第一个jsp(这扩展了另一个动作):
So, let's pass to the action, this is relative to the first jsp (this extend another action):
public class InserimentoDatiAction extends RegisterAction implements Preparable {
private static final long serialVersionUID = 1L;
public InserimentoDatiAction()
{
}
public String execute()
{
refreshDWR();
return "success";
}
public void refreshDWR()
{
String idComune = null;
try
{
idComune = getAnagraficaVDR().getUfficio().getComune().getCodComune();
}
catch (NullPointerException e)
{
//qualche campo � incompleto, le combobox non vengono caricate
}
if ( idComune != null)
{
DwrAjaxServiceImplEnti dwrEnte = new DwrAjaxServiceImplEnti();
this.setListaEnte( dwrEnte.get_Ente( idComune ) );
String idEnte = getAnagraficaVDR().getUfficio().getTipoufficio().getEnte().getIdEnte();
if ( idEnte != null)
{
DwrAjaxServiceImplTipoUfficio dwrTipoUff = new DwrAjaxServiceImplTipoUfficio();
this.setListaTipoUffici( dwrTipoUff.get_TipoUfficio(idComune, idEnte) );
String idTipoUff = getAnagraficaVDR().getUfficio().getTipoufficio().getIdTipoUfficio();
if ( idTipoUff != null)
{
DwrAjaxServiceImplUfficio dwrUff = new DwrAjaxServiceImplUfficio();
this.setListaUffici( dwrUff.get_Ufficio(idComune, idEnte, idTipoUff));
}
}
}
}
@Override
public void prepare() throws Exception
{
this.setDominiMail( CreazioneUtenzaDelegate.getInstance().getEmails() );
this.setListaComuni( CreazioneUtenzaDelegate.getInstance().getComuni() );
this.setListaApplicazioni( CreazioneUtenzaDelegate.getInstance().getApplicazioni() );
this.setListaQualifiche( CreazioneUtenzaDelegate.getInstance().getQualifiche() );
this.getSession().put("listaApplicazioni", this.getListaApplicazioni());
this.getSession().put("listaQualifiche", this.getListaQualifiche());
}
public boolean isGestioneAmministratore()
{
return false;
}
}
这与第二个jsp(确认页面)有关:
This is relative to the second jsp (the confirmation page):
public class InviaRichiestaAction extends ActionSupport implements Preparable, SessionAware
{
private static final long serialVersionUID = 1L;
private String cognome;
private String nome;
private Date dataNascita;
private List<Qualifica> listaQualifiche;
private String qualificaSelezionata;
private String qualificaSelezionataDescrizione;
private String comuneSelezionato;
private String ente;
private String tipoufficio;
private String ufficio;
private String telefono;
private String email;
private String confermaEmail;
private String ilTuodominio_Email;
private String ilTuodominio_EmailConferma;
private String ip;
private String applicazioniSelezionate;
private String applicazioniSelezionateDesc;
private String identi;
private static List<ComboBean> listaTipoUfficio = new ArrayList<ComboBean>();
private static List<ComboBean> listaUfficio = new ArrayList<ComboBean>();
//questo blocco di variabili anche se non è usato sta qui
//per non generare errori di validazione:
private List<Comune> listaComuni = new ArrayList<Comune>();
private List<ComboBean> listaEnte = new ArrayList<ComboBean>();
private List<Email> dominiMail = new ArrayList<Email>();
private List<ComboBean> listaTipoUffici = new ArrayList<ComboBean>();
private List<ComboBean> listaUffici = new ArrayList<ComboBean>();
private List<Applicazione> listaApplicazioni;
private Map<String, Object> session;
public String execute()
{
qualificaSelezionataDescrizione = BeanCopyUtil.getDescriptionFromBeanList(listaQualifiche, qualificaSelezionata, "getIdQualifica", "getDescrizione");
setApplicazioniSelezionateDesc(BeanCopyUtil.getDescriptionFromBeanList(listaApplicazioni, applicazioniSelezionate, "getIdApplicazione", "getDescrizione"));
return "success";
}
@Override
public void prepare() throws Exception
{
listaQualifiche = (List<Qualifica>) this.getSession().get("listaQualifiche");
listaApplicazioni = (List<Applicazione>) session.get("listaApplicazioni");
}
public String getDescrizioneTipoUfficioEUfficio()
{
String descrizioneTipoUfficioEUfficio = "";
if (listaTipoUfficio!=null && !listaTipoUfficio.isEmpty())
{
Iterator<ComboBean> it1 = listaTipoUfficio.iterator();
while (it1.hasNext())
{
ComboBean elem = it1.next();
if (elem.getIdValue().equals(tipoufficio))
{
descrizioneTipoUfficioEUfficio += elem.getValue();
break;
}
}
if (!listaUfficio.isEmpty())
{
it1 = listaUfficio.iterator();
while (it1.hasNext())
{
ComboBean elem = it1.next();
if (!elem.getValue().trim().isEmpty() && elem.getIdValue().equals(ufficio))
{
descrizioneTipoUfficioEUfficio += " - " + elem.getValue();
break;
}
}
}
}
return descrizioneTipoUfficioEUfficio;
}
[...a lot of boring getter and setter...]
}
InserimentoDatiAction的超类:
The superclass of InserimentoDatiAction:
public class RegisterAction extends ActionSupport implements SessionAware {
private static final long serialVersionUID = 1L;
private Anagrafica anagraficaVDR = new Anagrafica();
private String comuneSelezionatoVDR;
private String ilTuodominio_EmailVDR;
private String applicazioniSelezionateVDR;
private List<Email> dominiMail;
private List<Comune> listaComuni;
private List<Applicazione> listaApplicazioni;
private List<Qualifica> listaQualifiche;
private List<ComboBean> listaEnte = new ArrayList<ComboBean>();
private String enteSelezionatoVDR;
private List<ComboBean> listaTipoUffici = new ArrayList<ComboBean>();
private String tipoUfficioSelezionatoVDR;
private List<ComboBean> listaUffici = new ArrayList<ComboBean>();
private String ufficioSelezionatoVDR;
private String qualificaSelezionataDescrizioneVDR;
private String descrizioneTipoUfficioEUfficioVDR;
private String applicazioniSelezionateDescVDR;
private Map<String, Object> session;
[...other less important stuff...]
}
struts.xml的一部分，formDatiUtente是第一个jsp，visualizzaDatiRichiesta是第二个(确认jsp):
part of struts.xml, formDatiUtente is the first jsp, visualizzaDatiRichiesta is the second (confirmation jsp):
<action name="inserimentoDati"
class="it.alm.action.InserimentoDatiAction">
<result name="success">/jsp/creazioneUtenza/formDatiUtente.jsp</result>
</action>
<action name="inviaRichiesta"
class="it.alm.action.InviaRichiestaAction">
<result name="success">/jsp/creazioneUtenza/visualizzaDatiRichiesta.jsp</result>
<result name="input">/jsp/creazioneUtenza/formDatiUtente.jsp</result>
<result name="backToMenuAdmin">/jsp/pannelloDiGestione/menu.jsp</result>
</action>
推荐答案
Action1扩展了包含用于设置值的AnagraficaVDR的对象；
Action1 extends the one containing the AnagraficaVDR used to set the value;
Action2只是对ActionSupport的扩展，它对名为AnagraficaVDR的对象一无所知.
Action2 extends simply ActionSupport, it doesn't know anything about an object called AnagraficaVDR.
将表单发布到Action2时，如果表单未通过验证，则INPUT结果将返回第一个JSP，而第一个Action不会备份其数据.
When you post the form to Action2, and it fails validation, INPUT result returns the first JSP, without the first Action backing its data.
您必须重新考虑一下该机制:
You have to rethink the mechanism a bit:
- 如果您想用AnagraficaVDR的ORIGINAL值重新填充第一个JSP，则也必须将AnagraficaVDR提供给Action2(可能是通过在struts.xml中声明两个动作，指向包含AnagraficaVDR的同一动作的两个方法).
但这通常可以避免，因为如果我从其原始值中更改了10个字段，并且其中之一失败了验证，我希望它返回我的10个ALTERED值，以便仅更改失败的一个.使用上面提供的解决方案，它将全部重置为AnagraficaVDR值，而不是刚刚输入的值.
But this is generally avoided, because if I've changed 10 fields from their original values, and one of them is failing the validation, I want it to return my 10 ALTERED values, to be able to change only the failing one. With the solution provided above, it will reset all to AnagraficaVDR values, not the just entered values.
然后，您应该找到另一种更简单有效的方式，例如
Then you should find another way, simpler and effective, like
- 在第一个Action执行中从AnagraficaVDR填充Action1属性(或 准备)方法
- 从JSP1中的标记中删除所有
value="%{AnagraficaVDR.something".*
- populating your Action1 properties from AnagraficaVDR in the first Action execute (or prepare) method,
- remove all
value="%{AnagraficaVDR.something"from your tags in JSP1.*
*注意:这基于您先前的问题代码，其中标签具有name="properties" and value="%{AnagraficaVDR.properties}"
*NOTE: this is based on your previous question code, where the tag had name="properties" and value="%{AnagraficaVDR.properties}"
这样，第一个操作将仅第一次填充AnagraficaVDR中的值，然后在成功或输入的情况下保留输入的值.
This way the first action will populate the values from AnagraficaVDR only the first time, then keeping the entered values in case of SUCCESS or INPUT.
这篇关于Struts2验证，验证失败时重新填充所有字段的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
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