将javascript变量传递给Java bean [英] Passing javascript variable to java bean

问题描述

我正在尝试从传单地图(javascript)获取坐标，并将其传递给我的托管bean.为了将javascript变量发送到托管bean，我使用了答案

I am trying to get coordinates from leaflet map ( javascript) and passing them to my managed bean. In order to send javascript variable to my managed bean, I used the answer here

这是我正在使用的代码 JSF:

here is the code I'm using the JSF :

    <h:form id="formId">

        <h:inputHidden id="x" value="#{mapbean.latt}" />
        <h:inputHidden id="y" value="#{mapbean.longt}" />

        <p:remoteCommand name="myRemote" action="#{mapbean.displayLatLong()}" immediate="true" />
    </h:form>

<script type="text/javascript">
function onClick(e) {   

     var  ff = e.latlng.lat;
          ff2= e.latlng.lng;


     document.getElementById("formId:x").value = ff;
     document.getElementById("formId:y").value = ff2;                   
     myRemote();        

    } 

</script>

豆类:

//....
public int               latt;
public int               longt;
public void displayLatLong(){

        System.out.println("x: " + latt);
        System.out.println("y: " + longt);

}
 //getters and setters

我没有收到错误，但是latt和longt的值始终为0. ps:latt和longt是标记的坐标(传单标记) 正如Holger在评论中所说，该表单尚未提交，因此修改remoteCommand解决了我的问题.这是修改内容:

I'm not getting errors, but the value of latt and longt are always 0. ps :latt and longt are coordinates of a marker ( leaflet marker) Edit : as Holger said in his comment, the form was not submitted,so modifying the remoteCommand solved my problem. here are the modifications :

<p:remoteCommand name="myRemote" process="@form" actionListener="#{mapbean.displayLatLong()}"  />

推荐答案

您不需要表格和所有这些东西.

You don't need a form and all this stuff.

<p:remoteCommand name="myRemote" partialSubmit="true" process="@this"  action="#{mapbean.displayLatLong()}"/>

function onClick(e) {
  myRemote([
    { name: 'latt',  value: e.latlng.lat },
    { name: 'longt', value: e.latlng.lng }
  ]);
};

和服务器端

Map<String, String> params = FacesContext.getCurrentInstance().getExternalContext().getRequestParameterMap();

String latt  = params.get("latt");
String longt = params.get("longt");

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