java - How to populate a dropdown on page load in jsf? -

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• how populate options of h:selectonemenu database? 3 answers

i'm new jsf, read jsf life cycle couldn't understand how achieve this?

i've controller "cities" , other controller "countries". i'm going create new page, provide search functionality. showed 2 dropdowns on page (one countries , other cities), want first drop down populated on page load. please tell me controller use? cities/countries? or create new one? , how load data on page load?

thanks!

everyone correct, need use <f:selectitems/>

example:

.xhtml

<h:selectonemenu>     <f:selectitems value="#{mycontroller.listitems}"/> </h:selectonemenu> 

bean

public class mycontroller{     //the list items     private list<selectitem> listitems = null;      public mycontroller {         loadcombo();     }      (...)      //loading items     private void loadcombo() {         listitems = new arraylist<selectitem>();          //you can bd data using for. how add new item:         //listitems.add(new selectitem("itemvalue", "itemlabel"));          listitems.add(new selectitem("1", "item 1"));         listitems.add(new selectitem("2", "item 2"));         listitems.add(new selectitem("3", "item 3"));         listitems.add(new selectitem("4", "item 4"));     }      (...)      //getters , setters } 

do not populate list in "get" method, because jsf call more once , kill performance.