<form:form method="post" action="add" commandName="item">

	<table>
		...
			<td><form:select path="itype_id" items="${item_typeList}" itemValue="id" itemLabel="name" /></td>
		...
	</table>
</form:form>

@Autowired
	private ItemService itemService;
	
	@Autowired
	private Item_typeService item_typeService;
	
	

	@RequestMapping("/index")
	public String listItem(Map<String, Object> map) {

		map.put("item", new Item());
		map.put("itemList", itemService.listItem());
		
		map.put("item_type", new Item_type());
		map.put("item_typeList", item_typeService.listItem_type());

		return "item";
	}
@RequestMapping(value = "/add", method = RequestMethod.POST)
	public String addItem(@ModelAttribute("item") Item item,
			BindingResult result) {

		itemService.addItem(item);

		return "redirect:/index";
	}