一：controller代码：
后台就简单返回map集合就行,表结构也是简单的通过父类Id来实现的
/** ????* 三级联动 ????* @param id 父类id ????* @return ????*/ ???@RequestMapping(value = "/Options", method = { RequestMethod.POST, RequestMethod.GET}) ???@ResponseBody ???public List<Map<String, Object>> Options(int id){ ???????List<Map<String, Object>> dataList=new ArrayList<Map<String,Object>>(); ???????try { ???????????if(id!=null && id!=0){ ???????????????List<Item> items=itemService.getAllName(id); ???????????????for (Item i : items) { ???????????????????Map<String, Object> map=new HashMap<String, Object>(); ???????????????????map.put("id", i.getId()); ???????????????????map.put("name", i.getName()); ???????????????????????dataList.add(map); ???????????????} ???????????} ???????} catch (Exception e) { ???????????e.printStackTrace(); ???????} ???????return dataList; ???} ???????二：前端代码（ajax实现页面无刷新）：
$().ready(function() { ???$("#oneId").on("change",function(){ ???????var oneId = $("#oneId").val(); ???????$("#twoId").html("<option value=‘0‘>--请选择--</option>"); ???????$("#threeId").html("<option value=‘0‘>--请选择--</option>"); ???????$.ajax({ ???????????url: "Options.action", ???????????type: "POST", ???????????data: { ???????????????itemCatId:oneId //一级类目id ???????????}, ???????????dataType: "json", ???????????success: function(data) { ???????????????$.each(data, function(idx, obj) { ???????????????????$("#twoId").append("<option value=‘"+obj.id+"‘>" + obj.name + "</option>"); ???????????????}); ???????????} ???????}); ???????}); ???$("#twoId").change(function () { ???????var twoId = $("#twoId").val(); ???????$("#threeId").html("<option value=‘0‘>--请选择--</option>"); ???????$.ajax({ ???????????url: "Options.action", ???????????type: "POST", ???????????data: { ???????????????itemCatId:twoId//二级类目id ???????????}, ???????????success: function(data) { ???????????????$.each(data, function(idx, obj) { ???????????????????$("#threeId").append("<option value=‘"+obj.id+"‘>" + obj.name+ "</option>"); ???????????????}); ???????????} ???????}); ???????});}); ??页面代码就不贴了，此三级联动是在绑定好一级分类的基础上进行的，oneId，twoId，threeId分别指一，二，三级select的id
jQuery select三级联动
原文地址：https://www.cnblogs.com/hxbhdljmyz/p/9317826.html