structs2注解+jsp+ajax实现post异步载入select

流程：

1.点击载入btn发起异步请求post

2.后台处理请求返回数据

3.前端获取数据成功，对数据进行处理

前端：

html：首先要导入jq包，不然怎么用ajax呢。

<script type="text/javascript" src="js/jquery.js"></script>

<select name="warId" id="warId" style="height:100%;107px">
	<option value="">全部仓库 </option>
</select>

<script type="text/javascript">
$(document).ready(function(){    //这里实现的是： 点击class为add的button时载入仓库列表
	$(".add").click(function(){
			$.post("xxxx.do",function(data){      //要异步载入的action，和成功后的回调
				var objs = data.warehouses;     //相应action里的属性
				var selObj = $("#wareId");   
				selObj.empty();
				for (var i in objs) {
					var obj = objs[i];
					addOption(selObj,obj.id,obj.warehouseName); //为Select追加一个Option(下拉项)           
				}
			},"json");	 //返回类型
	 }); 
});
function addOption(selObj,value,text){
	var optionstring = "<option value="" + value + "" >"+ text + "</option>";
	selObj.append(optionstring); //为Select追加一个Option(下拉项)           
}
</script>

后台structs：

使用注解实现，

要注意的是声明类的时候要加注解：@ParentPackage("json-default")

方法声明注解： @Action(value = "xxxx", results = @Result(name = "success", type="json"))  

须要跳转页面就把type = "json" 换成  location = "/mobile/auction_detailed.jsp" 要跳转的页面

@ParentPackage("json-default")
public class WarHouseAction extends ActionSupport {
	@Autowired
	private WarehouseService warehouseService;
	
	private List<Warehouse> warehouses;
	
	/**
	 * 后台ajax
	 * @return
	 * 须要跳转页面就把type = "json" 换成  location = "/mobile/auction_detailed.jsp" 要跳转的页面
	 */
	@Action(value = "addGood_before", results = @Result(name = "success", type="json"))  
	public String addGoodBefore(){
		warehouses = warehouseService.findAllEnableWarehouses();   //这个是返回到页面的
		return "success";
	}

	public WarehouseService getWarehouseService() {
		return warehouseService;
	}

	public void setWarehouseService(WarehouseService warehouseService) {
		this.warehouseService = warehouseService;
	}

	public List<Warehouse> getWarehouses() {
		return warehouses;
	}

	public void setWarehouses(List<Warehouse> warehouses) {
		this.warehouses = warehouses;
	}
}

提示一下用的是jquery.js   v1.4.1的  ，用min的貌似是返回json的不是返回obj