springmvc ztree 实现权限菜单的展示

前台js

//打开菜单窗口
function openMenuDialog(){
	var selected = $("#list").datagrid('getSelected');
    if (selected != null) {
    	$("#id").val(selected.id);
    	queryMenus(selected.id);
    	$("#menuWindow").window("open");
    } else {
   	 $.messager.alert('提示', "未选择数据！"); 
    }
}
//角色-菜单信息入库
function ajaxSubmit(rid,idstr){
	$.post("${ctx}/roleMenu/save.jhtml",{"roleId":rid,"ids":idstr},function(obj){
		$.messager.alert('提示',obj.msg);
		$("#menuWindow").window('close');
	},'json');
}

<!-- ztree -->
<script type="text/javascript">
var tree = "";
var setting = {
	check : {
		chkboxType:{"Y":"ps","N":"ps"},//勾选checkbox对于父子节点的关联关系
		chkStyle:"checkbox",
		enable : true	//是否复选框
	},
	//数据
	data : {
		simpleData : {
			enable : true
		}
	}
};
//查询菜单信息
function queryMenus(roleId){
	$.post('${ctx}/role/treedata.jhtml', {'roleId':roleId}, function(zNodes) {
		for (var i = 0; i < zNodes.length; i++) {
			if (zNodes[i].isParent) {

			} else {
				//zNodes[i].icon = "${ctxStatic}/images/532.ico";//设置图标
			}
		}
		tree = $.fn.zTree.init($("#tree"), setting, zNodes);
		tree.expandAll(true);//全部展开
		//var nodes = treeObj.getNodes();
	}, 'json');
}
//获取选中节点
function onCheck(){
	 var rid = $("#id").val();
	 var treeObj=$.fn.zTree.getZTreeObj("tree");
     var nodes=treeObj.getCheckedNodes(true);
     var ids = new Array();
     for(var i=0;i<nodes.length;i++){
    	//获取选中节点的值
    	 ids.push(nodes[i].id);
	    // v+=nodes[i].id + ",";
	    //alert(nodes[i].id); 
     }
	ajaxSubmit(rid,ids);     
}
</script>

后台：action

@RequestMapping(value = "/treedata.jhtml")
	@ResponseBody
	public String treedata(HttpServletRequest request, Model model) {
		DynamicParams params = new DynamicParams(request);
		List<Map<String, Object>> mapList = Lists.newArrayList();
		
		params.put("allMenu", "allMenu");
		List<Menu> list = menuManager.findMenuList(params);
		
		List<RoleMenu> roleMenus = roleMenuManager.findList(params);
		
		for(int i=0;i<list.size();i++){
			Menu e = list.get(i);
			Map<String, Object> map = Maps.newHashMap();
			map.put("id", e.getId());
			map.put("pId", e.getParentId()!=null?e.getParentId():0);
			map.put("name", e.getName());
			for(RoleMenu roleMenu:roleMenus){
				if(roleMenu.getMenuId()==e.getId()){
					map.put("checked", true);
				}
			}
			mapList.add(map);
		}
		return toJson(mapList);
	}

service

public List<Menu> findMenuList(DynamicParams params) {
		List<Menu> menus = new ArrayList<Menu>();

		if ("allMenu".equals(params.getString("allMenu"))) {
			menus = menuDao.findList(params);
		} else {
			// 通过用户查询角色
			List<UserRole> userRoles = userRoleDao.findList(params);
			// 通过角色查询菜单
			List<RoleMenu> roleMenus = new ArrayList<RoleMenu>();
			if (userRoles != null && userRoles.size() > 0) {
				for (UserRole userRole : userRoles) {
					params = new DynamicParams();
					if (userRole != null) {
						if (userRole.getRoleId().equals(params.getString("rid"))) {
							break;
						}
						params.put("roleId", userRole.getRoleId().toString());
						List<RoleMenu> rms = roleMenuDao.findList(params);
						for (RoleMenu roleMenu : rms) {
							roleMenus.add(roleMenu);
						}
					}
				}
			}

			// 查询菜单信息
			for (RoleMenu roleMenu : roleMenus) {
				if (roleMenu != null) {
					Menu menu = menuDao.find(roleMenu.getMenuId());
					if(menu!=null){
						menus.add(menu);
					}
				}
			}
			menus = removeDuplicate(menus);
			Collections.sort(menus);
		}
		return menus;
	}

	/**
	 * 去除菜单中重复项
	 * 
	 * @param list
	 * @return
	 */
	private List<Menu> removeDuplicate(List<Menu> list) {
		List<Menu> result = new ArrayList<Menu>();
		Set<Long> menuIds = new HashSet<Long>();
		for (int i = 0; i < list.size(); i++) {
			Menu m = list.get(i);
			if (m != null && menuIds.add(m.getId())) {
				result.add(m);
			}
		}
		return result;
	}