下拉框多级联动

function getShelf(){
     var storageId = $("#location").val();
     //return alert(storageId);
     $.ajax({
         url:"${pageContext.request.contextPath}/asset/asset/getShelf?storageId="+storageId,
         type:"get",
         async:false,
         timeout:"1000",
         success:function(data){
             $("#shelvesId option").remove();
             $("#shelvesId").append("<option value='0'>--请选择--</option>");
             if (data != 0) {
                 for ( var i = 0; i < data.length; i++) {
                     var shelvesId = data[i].shelvesId;
                     var shelname = data[i].shelname;
                     $("#shelvesId").append("<option value="+shelvesId+">" + shelname + "</option>");
                 }
             }
         },
         error : function(XMLResponse) {
             alert(XMLResponse.responseText);
         }
     });
}

服务端

//查询获取id下货架
@RequestMapping(value="getShelf")
public String getShelf(HttpServletRequest reuqest, HttpServletResponse response) throws Exception{
    //格式
    response.setContentType("text/json; charset=UTF-8");
    //调用仓库并获取仓库ID
    String storageId = reuqest.getParameter("storageId");
    Integer id = Integer.parseInt(storageId);
    PrintWriter out = null;
    try{
        out = response.getWriter();
    }catch(Exception e){
        e.printStackTrace();
    }
    JSONArray array = new JSONArray();
    JSONObject member = null;
    try{
        //根据仓库的Id 来查找仓库下的所有货架信息
        LmShelvesExample shelvesExample = new LmShelvesExample();
        LmShelvesExample.Criteria criteria = shelvesExample.createCriteria();
        if (StringUtils.isNotEmpty(id.toString()) && !"0".equals(id)){
            criteria.andRemarksEqualTo(id.toString());
        }
        List<LmShelves> shelvesList = shelvesService.selectByExample(shelvesExample);
        for(LmShelves shelf:shelvesList){
            member = new JSONObject();
            member.put("shelvesId", shelf.getShelvesId());
            member.put("shelname", shelf.getShelname());
            array.add(member);
        }
    }catch(Exception e){
        e.printStackTrace();
    }
    out.print(array.toString());
    return null;
}