怎么得到WebContext

package com.demo;
import javax.faces.event.ActionEvent;
import com.esri.adf.web.data.WebContext;
import com.esri.adf.web.data.geometry.WebExtent;
import com.esri.adf.web.faces.event.MapEvent;
import com.esri.adf.web.faces.event.MapToolAction;
public class MyFullExtent {
WebContext context;

public WebContext getContext() {
return context;
}
public void setContext(WebContext context) {
this.context = context;
}
                                                                                    
public void setFullExtent(){
try{
WebExtent ex=context.getWebMap().getFullExtent();
context.getWebMap().setCurrentExtent(ex);
context.refresh();

}catch(Exception ex){
ex.printStackTrace();
}
}
}

<managed-bean>
        <managed-bean-name>myFullExtent</managed-bean-name>
        <managed-bean-class>com.demo. MyFullExtent </managed-bean-class>
        <managed-bean-scope>session</managed-bean-scope>
        <managed-property>
          <property-name>context</property-name>
          <value>#{mapContext}</value>
        </managed-property>
  </managed-bean>

在配置文件里配置<managed-propety>将java类中的字段赋值为#{mapContext}

 

通过WebUtil也是一种方法

 

FacesContext facesContext=phaseEvent.phaseEvent.getFacesContext();

WebUtil.getWebContext(facesContext.getViewRoot());