Java f:datatable中的setpropertyactionlistener始终返回最后一个对象

f:setpropertyactionlistener在datatable中不会给我当前行，而是总是给我最后一个对象。。 请帮忙。谢谢

<p:dataTable id="datatableid"  value="#{updateSiteObj.emsList}" var="pickListObjEMS" >
<p:column headerText="EMS"> 
<p:pickList id="pojoPickListEMSID" value="#{pickListObjEMS.serverList}" var="ems"
itemValue="#{ems}" itemLabel="#{ems}" style="border-color: white!important" onTransfer="ajaxSubmit1()">  
<f:facet name="sourceCaption">Available</f:facet>  
<f:facet name="targetCaption">To be removed</f:facet>  
</p:pickList>
<p:remoteCommand action="# {updateSiteObj.onEMSTransfer}" name="ajaxSubmit1" >
<f:setPropertyActionListener value="# {pickListObjEMS}" target="#{updateSiteObj.tempObj}"/>
</p:remoteCommand> 
</p:column>                                     
</p:dataTable>

code.xhtml

<p:dataTable id="datatableid"  value="#{updateSiteObj.emsList}" var="pickListObjEMS" >
<p:column headerText="EMS"> 
<p:pickList id="pojoPickListEMSID" value="#{pickListObjEMS.serverList}" var="ems"
itemValue="#{ems}" itemLabel="#{ems}" style="border-color: white!important" onTransfer="ajaxSubmit1()">  
<f:facet name="sourceCaption">Available</f:facet>  
<f:facet name="targetCaption">To be removed</f:facet>  
</p:pickList>
<p:remoteCommand action="# {updateSiteObj.onEMSTransfer}" name="ajaxSubmit1" >
<f:setPropertyActionListener value="# {pickListObjEMS}" target="#{updateSiteObj.tempObj}"/>
</p:remoteCommand> 
</p:column>                                     
</p:dataTable>

可用
删除

java

<p:dataTable id="datatableid"  value="#{updateSiteObj.emsList}" var="pickListObjEMS" >
<p:column headerText="EMS"> 
<p:pickList id="pojoPickListEMSID" value="#{pickListObjEMS.serverList}" var="ems"
itemValue="#{ems}" itemLabel="#{ems}" style="border-color: white!important" onTransfer="ajaxSubmit1()">  
<f:facet name="sourceCaption">Available</f:facet>  
<f:facet name="targetCaption">To be removed</f:facet>  
</p:pickList>
<p:remoteCommand action="# {updateSiteObj.onEMSTransfer}" name="ajaxSubmit1" >
<f:setPropertyActionListener value="# {pickListObjEMS}" target="#{updateSiteObj.tempObj}"/>
</p:remoteCommand> 
</p:column>                                     
</p:dataTable>

 public class UpdateSite {

/** Creates a new instance of UpdateSite */

private List<List<String>> tempEMSList = new ArrayList<List<String>>();

private List<serverList> emsList = new ArrayList<serverList>();

private serverList tempObj = new serverList();

public String updateSiteDetails() {
List<String> source = new ArrayList<String>();
            List<String> target = new ArrayList<String>();
            for (String[] str : sg.getEMSDetailsList()) {
                source.add(str[0]);

            }

            DualListModel<String> tempSource = new DualListModel<String>(source, target);
            serverList obj = new serverList();
            obj.setServerList(tempSource);
//here i am adding two objects
            emsList.add(emsobj);
}
public void onEMSTransfer() {

    System.out.print("tempOBJ size:" + tempObj.getServerList().getSource().size() + "=>" + tempObj.getServerList().getTarget().size());

}

公共类更新站点{
/**创建UpdateSite的新实例*/
私有列表tempEMSList=newarraylist（）；
私有列表emsList=new ArrayList（）；
private serverList tempObj=new serverList（）；
公共字符串updatestedetails（）{
列表源=新的ArrayList（）；
列表目标=新的ArrayList（）；
对于（字符串[]str:sg.getEMSDetailsList（））{
source.add（str[0]）；
}
DualListModel tempSource=新的DualListModel（源、目标）；
serverList obj=新的serverList（）；
对象设置服务器列表（临时源）；
//这里我添加了两个对象
emsList.add（emsobj）；
}
公共无效onEMSTransfer（）{
System.out.print（“tempOBJ size:+tempOBJ.getServerList（）.getSource（）.size（）+”=>“+tempOBJ.getServerList（）.getTarget（）.size（））；
}

serverList是一个具有数据类型DualListModel变量的类。在onEMSTransfer中，我看到第二个对象正在显示，即使我在picklist中操作第一个对象。

该

在全局范围内对给定的

名称生成JavaScript函数（右键单击页面并查看源代码以亲眼看到）：

<p:dataTable id="datatableid"  value="#{updateSiteObj.emsList}" var="pickListObjEMS" >
<p:column headerText="EMS"> 
<p:pickList id="pojoPickListEMSID" value="#{pickListObjEMS.serverList}" var="ems"
itemValue="#{ems}" itemLabel="#{ems}" style="border-color: white!important" onTransfer="ajaxSubmit1()">  
<f:facet name="sourceCaption">Available</f:facet>  
<f:facet name="targetCaption">To be removed</f:facet>  
</p:pickList>
<p:remoteCommand action="# {updateSiteObj.onEMSTransfer}" name="ajaxSubmit1" >
<f:setPropertyActionListener value="# {pickListObjEMS}" target="#{updateSiteObj.tempObj}"/>
</p:remoteCommand> 
</p:column>                                     
</p:dataTable>

函数ajaxSubmit1（）{/*设置第1行的pickListObjEMS.*/}
函数ajaxSubmit1（）{/*设置第2行的pickListObjEMS.*/}
函数ajaxSubmit1（）{/*设置第3行的pickListObjEMS.*/}
函数ajaxSubmit1（）{/*设置第4行的pickListObjEMS.*/}
函数ajaxSubmit1（）{/*设置第x行的pickListObjEMS.*/}

你看，它生成了多个同名的JS函数，相互覆盖直到最后一个！这就解释了为什么你总是得到最后一项；最后生成的JS函数是所有行调用的函数

<p:dataTable id="datatableid"  value="#{updateSiteObj.emsList}" var="pickListObjEMS" >
<p:column headerText="EMS"> 
<p:pickList id="pojoPickListEMSID" value="#{pickListObjEMS.serverList}" var="ems"
itemValue="#{ems}" itemLabel="#{ems}" style="border-color: white!important" onTransfer="ajaxSubmit1()">  
<f:facet name="sourceCaption">Available</f:facet>  
<f:facet name="targetCaption">To be removed</f:facet>  
</p:pickList>
<p:remoteCommand action="# {updateSiteObj.onEMSTransfer}" name="ajaxSubmit1" >
<f:setPropertyActionListener value="# {pickListObjEMS}" target="#{updateSiteObj.tempObj}"/>
</p:remoteCommand> 
</p:column>                                     
</p:dataTable>

至少有两种方法可以解决此问题：

<p:dataTable id="datatableid"  value="#{updateSiteObj.emsList}" var="pickListObjEMS" >
<p:column headerText="EMS"> 
<p:pickList id="pojoPickListEMSID" value="#{pickListObjEMS.serverList}" var="ems"
itemValue="#{ems}" itemLabel="#{ems}" style="border-color: white!important" onTransfer="ajaxSubmit1()">  
<f:facet name="sourceCaption">Available</f:facet>  
<f:facet name="targetCaption">To be removed</f:facet>  
</p:pickList>
<p:remoteCommand action="# {updateSiteObj.onEMSTransfer}" name="ajaxSubmit1" >
<f:setPropertyActionListener value="# {pickListObjEMS}" target="#{updateSiteObj.tempObj}"/>
</p:remoteCommand> 
</p:column>                                     
</p:dataTable>

为每个JS函数指定一个唯一的名称。假设您的
{pickListObjEMS}
具有一个表示唯一标识符的
id
属性，则应执行以下操作：

<p:dataTable id="datatableid"  value="#{updateSiteObj.emsList}" var="pickListObjEMS" >
<p:column headerText="EMS"> 
<p:pickList id="pojoPickListEMSID" value="#{pickListObjEMS.serverList}" var="ems"
itemValue="#{ems}" itemLabel="#{ems}" style="border-color: white!important" onTransfer="ajaxSubmit1()">  
<f:facet name="sourceCaption">Available</f:facet>  
<f:facet name="targetCaption">To be removed</f:facet>  
</p:pickList>
<p:remoteCommand action="# {updateSiteObj.onEMSTransfer}" name="ajaxSubmit1" >
<f:setPropertyActionListener value="# {pickListObjEMS}" target="#{updateSiteObj.tempObj}"/>
</p:remoteCommand> 
</p:column>                                     
</p:dataTable>


...

只需在表外只有一个
而没有
，并将项目的唯一ID（或行索引）作为请求参数传递

<p:dataTable id="datatableid"  value="#{updateSiteObj.emsList}" var="pickListObjEMS" >
<p:column headerText="EMS"> 
<p:pickList id="pojoPickListEMSID" value="#{pickListObjEMS.serverList}" var="ems"
itemValue="#{ems}" itemLabel="#{ems}" style="border-color: white!important" onTransfer="ajaxSubmit1()">  
<f:facet name="sourceCaption">Available</f:facet>  
<f:facet name="targetCaption">To be removed</f:facet>  
</p:pickList>
<p:remoteCommand action="# {updateSiteObj.onEMSTransfer}" name="ajaxSubmit1" >
<f:setPropertyActionListener value="# {pickListObjEMS}" target="#{updateSiteObj.tempObj}"/>
</p:remoteCommand> 
</p:column>                                     
</p:dataTable>


...
...

您只需要根据ID重构所需的
{pickListObjEMS}
，该ID在此处作为请求参数传递，名为
ID

<p:dataTable id="datatableid"  value="#{updateSiteObj.emsList}" var="pickListObjEMS" >
<p:column headerText="EMS"> 
<p:pickList id="pojoPickListEMSID" value="#{pickListObjEMS.serverList}" var="ems"
itemValue="#{ems}" itemLabel="#{ems}" style="border-color: white!important" onTransfer="ajaxSubmit1()">  
<f:facet name="sourceCaption">Available</f:facet>  
<f:facet name="targetCaption">To be removed</f:facet>  
</p:pickList>
<p:remoteCommand action="# {updateSiteObj.onEMSTransfer}" name="ajaxSubmit1" >
<f:setPropertyActionListener value="# {pickListObjEMS}" target="#{updateSiteObj.tempObj}"/>
</p:remoteCommand> 
</p:column>                                     
</p:dataTable>