Spring MVC中一个表单的许多commandName [英] many commandName for one form in Spring MVC

问题描述

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
  <中必须是唯一的/ pre> 
 
 
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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