Posted in Javascript onMarch 01, 2015
前台使用EasyUI实现 . EasyUI向后台传递一个id参数 .
第一次加载 , 向后台传递的id为null .
之后每次将树节点展开 , 会向后台传递一个当前节点的 id .
Control层 :
/** * tree */ @RequestMapping(value = "/tree.do") public void mytree(HttpServletResponse response, String id) { this.writeJson(response, bookService.getChildrenTree(id)); }
Service层 :
@Transactional @Override public List<Tree> getChildrenTree(String pid) { try { List<Tree> result = new ArrayList<Tree>(); //获得儿子节点的列表 List<TBookType> childrenList = this.getChildrenType(pid); if (childrenList != null && childrenList.size() > 0) { for (TBookType child : childrenList) { // 获取孙子的个数 long count = bookDao.getChildrenCount(String.valueOf(child.getId())); Tree node = new Tree(); node.setId(String.valueOf(child.getId())); node.setPid(String.valueOf(child.getPid())); node.setText(child.getName()); node.setChildren(null); node.setState(count > 0 ? "closed" : "open"); //将儿子列表childrenList数据逐个存到树当中 result.add(node); } } return result; } catch (Exception e) { throw new BusinessException("获取图书类型数据出现错误!", e); } }
Dao层 :
@Override public List<TBookType> getChildrenType(String pid) { //这个的pid就是当前展开节点的id , 通过父节点的 id 来获得子节点 StringBuilder sqlstr = new StringBuilder(); if (StringUtils.isBlank(pid)) sqlstr.append("select * from booktype bt where bt.pid=0"); else sqlstr.append("select * from booktype bt where bt.pid=" + pid ); return this.search2(TBookType.class, sqlstr.toString()); }
@Override public long getChildrenCount(String pid) { //这个的pid就是当前展开节点的id , 通过父节点的 id 来获得子节点的个数 StringBuilder sqlstr = new StringBuilder(); if (StringUtils.isBlank(pid)) sqlstr.append("select count(*) from booktype tb where tb.pid='0'"); else sqlstr.append("select count(*) from booktype tb where tb.pid='" + pid + "'"); return this.count(sqlstr.toString()); }
以上所述就是本文关于EasyUI实现异步树的全部代码了,希望对大家能有所帮助
jquery中EasyUI实现异步树
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hebedich声明:登载此文出于传递更多信息之目的,并不意味着赞同其观点或证实其描述。
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