layui和后端如何连起来

<link rel="stylesheet" href="static/layui/css/layui.css" media="all" />
<script type="text/javascript" src="static/layui/layui.js"></script>
<table class="layui-hide" id="test" lay-filter="table"></table>

layui.use(['form','layer','table'], function(){
 var table = layui.table
 ,form = layui.form,$=layui.$;

 table.render({
 elem: '#test' //绑定table id
 ,url:'sys/menu/list' //数据请求路径
 ,cellMinWidth: 80
 ,cols: [[
 {type:'numbers'}
 ,{field:'name', title:'菜单名称'}
 ,{field:'parentName', title:'父菜单名称',width:150}
 ,{field:'url', title: '菜单路径'}
 ,{field:'perms', title: '菜单权限'}
 ,{field:'type', title:'类型'}
 ,{field:'icon', title:'图标'}
 ,{field:'orderNum', title:'排序'}
 ,{fixed: 'right',title: '操作', width:180, align:'center', toolbar: '#toolBar'}//一个工具栏 具体请查看layui官网
 ]]
 ,page: true //开启分页
 ,limit:10 //默认十条数据一页
 ,limits:[10,20,30,50] //数据分页条
 ,id: 'testReload' 
 });
});

 @RequestMapping("/list")
 @ResponseBody
 @RequiresPermissions("sys:menu:list")
 public Layui list(@RequestParam Map<String, Object> params){
 //查询列表数据
 Query query = new Query(params);
 List<SysMenuEntity> menuList = sysMenuService.queryList(query);
 int total = sysMenuService.queryTotal(query);
 PageUtils pageUtil = new PageUtils(menuList, total, query.getLimit(), query.getPage());
 return Layui.data(pageUtil.getTotalCount(), pageUtil.getList());
 }

public class Layui extends HashMap<String, Object> {

 public static Layui data(Integer count,List<?> data){
 Layui r = new Layui();
 r.put("code", 0);
 r.put("msg", "");
 r.put("count", count);
 r.put("data", data);
 return r;
 }
}

@Data
public class PageUtils implements Serializable {
 private static final long serialVersionUID = -1202716581589799959L;
 //总记录数
 private int totalCount;
 //每页记录数
 private int pageSize;
 //总页数
 private int totalPage;
 //当前页数
 private int currPage;
 //列表数据
 private List<?> list;
 /**
 * 分页
 * @param list 列表数据
 * @param totalCount 总记录数
 * @param pageSize 每页记录数
 * @param currPage 当前页数
 */
 public PageUtils(List<?> list, int totalCount, int pageSize, int currPage) {
 this.list = list;
 this.totalCount = totalCount;
 this.pageSize = pageSize;
 this.currPage = currPage;
 this.totalPage = (int)Math.ceil((double)totalCount/pageSize);
 }
}