本文介绍了Spring MVC中一个表单的许多commandName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

限时删除!!

我有一个页面jsp,我将使用不同POJO类的许多属性,所以我需要在表单中使用两个commandName。
可以在控制器中使用多个@ModelAttribute,那么如果多个commandName不工作又有什么意义呢?



例如我想插入一个信息,名称和功能,name是类Agent中的一个属性,function是类Activity中的一个属性?我该怎么办?



控制器



  @RequestMapping(value =/ fiche_service ,method = RequestMethod.GET)
public ModelAndView Fiche_service(@ModelAttribute Activite activitey,@ ModelAttribute Etablissement etabl,ModelMap model){
Agent ag = new Agent();
返回新的ModelAndView(FicheService,agent,ag);

}



表格



 < form:form 
action =$ {pageContext.request.contextPath} / ajouter_activite
method =postcommandName =activity commandName =etabl>

< table id =tabmenu>
< tr>
< td> Fonction:< / td>
< td>< form:input type =textclass =round default-width-inputpath =fonction/>< / td>
< / tr>
< tr>
< td> Nom d'établissement:< / td>
< td>< form:input type =textclass =round default-width-inputpath =noml/>< / td>
< / tr>
< tr>
< td> Ville:< / td>
< td>< form:input type =textclass =round default-width-inputpath =villel/>< / td>
< / tr>
< tr>
< td>Délégation:< / td>
< td>< form:input type =textclass =round default-width-inputpath =cd_reg< / td>
< / tr>
< tr>
< td>日期首字母:< / td>
< td>< form:input type =textname =dateclass =tcalvalue =path =dateAffect/>< / td>
< / tr>
< tr>
< td>日期:< / td>
< td>< form:input type =textname =dateclass =tcalvalue =path =dateAffect_etab/>< / td>
< / tr>
< tr>
< td>< input class =button round blue-right ic-right-arrow
type =submitvalue =Créer/>< / td>
< td>< input class =button round blue-right ic-right-arrow
type =resetvalue =Initialiser/>< / td>
< / tr>
< / table>
< / form:form>

例外:

  Etat HTTP 500  -  /WEB-INF/pages/FicheService.jsp(第397行,第64列)属性限定名在元素


第397行==>

  method =post commandName =activitycommandName =etabl> 


解决方案

不可能有多个 commandName 带有 springform:form 标签的属性。



(实现 org.springframework.web.servlet.tags.form.FormTag 只有一个字段来保存此值。)



最简单的解决方案(无效工作)将使用包装器命令对象,它必须包含字段。

  public class CombinedCommand() {
活动活动;
Etabl etabl;
// Getter和setter
}

jsp:

 < form:form 
action =$ {pageContext.request.contextPath} / ajouter_activite
method =post commandName =combinedCommand>

...
< form:input type =textpath =activity.x/>
.. 。
< form:input type =textpath =etabl.y/>
...
< / form:form>


I have a page jsp where i will use many attributes from differents POJO Classes so I need to use two commandName in the form.It's possible to user multiple @ModelAttribute in the controller so what's the point if multiple commandName is not working ??

For example I want to insert an information, name and function, name is an attribute in class Agent and function is an attribute in class Activity ? what should I do?

The controller

@RequestMapping(value="/fiche_service",method=RequestMethod.GET)
    public ModelAndView Fiche_service(@ModelAttribute Activite activitey,@ModelAttribute Etablissement etabl,ModelMap model) {
        Agent ag = new Agent();
        return new ModelAndView("FicheService","agent",ag);

    }

The form

<form:form
    action="${pageContext.request.contextPath}/ajouter_activite"
    method="post" commandName="activity" commandName="etabl">

  <table id="tabmenu">
     <tr>
         <td>Fonction :</td>
         <td><form:input type="text" class="round default-width-input" path="fonction"/></td>
     </tr>
     <tr>
         <td>Nom d'établissement :</td>
         <td><form:input type="text" class="round default-width-input" path="noml"/></td>
     </tr>
     <tr>
         <td>Ville :</td>
         <td><form:input type="text" class="round default-width-input" path="villel"/></td>
     </tr>
     <tr>
         <td>Délégation :</td>
         <td><form:input type="text" class="round default-width-input" path="cd_reg"</td>
     </tr>
     <tr>
         <td>Date début :</td>
         <td><form:input type="text" name="date" class="tcal" value="" path="dateAffect"/></td>
     </tr>
     <tr>
         <td>Date fin :</td>
         <td><form:input type="text" name="date" class="tcal" value="" path="dateAffect_etab"/></td>
     </tr>
     <tr>
         <td><input class="button round blue image-right ic-right-arrow"
                    type="submit" value="Créer" /></td>
         <td><input class="button round blue image-right ic-right-arrow"
                    type="reset" value="Initialiser" /></td>
     </tr>
  </table>
</form:form>

The Exception:

Etat HTTP 500 - /WEB-INF/pages/FicheService.jsp (line: 397, column: 64) Attribute qualified names must be unique within an element

line 397 ==>

method="post" commandName="activity" commandName="etabl">
解决方案

It is impossible to have multiple commandName attributes with a springform:form tag.

(The implementation org.springframework.web.servlet.tags.form.FormTag has only a single field to hold this value).

The easiest solution (that defently works) would be using a wrapper command objects, that has to fields.

public class CombinedCommand() {
    Activity activity;
    Etabl etabl;
    //Getter and setter
}

jsp:

<form:form
  action="${pageContext.request.contextPath}/ajouter_activite"
  method="post" commandName="combinedCommand"">

  ...
  <form:input type="text"path="activity.x"/>
  ...
  <form:input type="text"path="etabl.y"/>
  ...
</form:form>

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09-08 22:17