How to return multiple model object returns with spring annotations?

I am converting my controllers to annotated style controllers in spring mvc.

Basically I do this in the old style controller simpleformcontroller.

protected Map referenceData(HttpServletRequest request) throws Exception { 
    Map referenceData = new HashMap(); 
     List<ItemVo> lstItem1 = eqrManager .searchAllEqptCondQualItems("A1", "BOXES");     List<ItemVo> lstItem2 = eqrManager.searchAllEqptFullQualItems("A2", "CANNED_GOODS");     referenceData.put("BOX_ITEMS", lstItem1);
referenceData.put("CANNED_ITEMS", lstItem2); 
return referenceData; 
}

I do below way开发者_运维技巧 by taking model as a input argument,But it is calling only one time,How can i make below method should call everytime when form submission happens.

@RequestMapping(method=RequestMethod.GET) public void setUp(Model model) {  
   model.addAttribute("CANNED_ITEMS", eqrManager.searchAllEqptFullQualItems("A2", "CANNED_GOODS"))          .addAttribute("BOX_ITEMS", eqrManager.searchAllEqptCondQualItems("A1", "BOXES")); } 

Regards,

Raj

You can use @ModelAttribute-annotated method as a replacement of referenceData():

@ModelAttribute("CANNED_ITEMS")
public List<ItemVo> cannedItems() {
    return eqrManager.searchAllEqptFullQualItems("A2", "CANNED_GOODS");
}

@ModelAttribute("BOX_ITEMS")
public List<ItemVo> boxItems() {
    return eqrManager .searchAllEqptCondQualItems("A1", "BOXES");
}

These methods are called automatically for each request handled by the controller where they're defined, and their results are addded to the model.