jQuery插件zTree实现单独选中根节点中第一个节点示例

本文实例讲述了jQuery插件zTree实现单独选中根节点中第一个节点的方法。分享给大家供大家参考，具体如下：

1、实现代码：

<!DOCTYPE html>
<html>
<head>
 <title>zTree实现基本树</title>
 <meta http-equiv="content-type" content="text/html; charset=UTF-8">
 <link rel="stylesheet" type="text/css" href="zTree_v3/css/demo.css" rel="external nofollow" >
 <link rel="stylesheet" type="text/css" href="zTree_v3/css/zTreeStyle/zTreeStyle.css" rel="external nofollow" >
 <script type="text/javascript" src="zTree_v3/js/jquery-1.4.4.min.js"></script>
 <script type="text/javascript" src="zTree_v3/js/jquery.ztree.core.min.js"></script>
 <script type="text/javascript">
  <!--
  var setting = {
   data: {
    simpleData: {
     enable: true
    }
   }
  };
  var zNodes =[
   { id:1, pId:0, name:"湖北省", open:true},
   { id:11, pId:1, name:"武汉市", open:true},
   { id:111, pId:11, name:"汉口"},
   { id:112, pId:11, name:"汉阳"},
   { id:113, pId:11, name:"武昌"},
   { id:12, pId:1, name:"黄石市"},
   { id:121, pId:12, name:"黄石港区"},
   { id:122, pId:12, name:"西塞山区"},
   { id:123, pId:12, name:"下陆区"},
   { id:124, pId:12, name:"铁山区"},
   { id:13, pId:1, name:"黄冈市"},
   { id:131, pId:13, name:"黄州区"},
   { id:132, pId:13, name:"麻城市"},
   { id:133, pId:13, name:"武穴市"},
   { id:134, pId:13, name:"团风县"},
   { id:135, pId:13, name:"浠水县"},
   { id:136, pId:13, name:"罗田县"},
   { id:137, pId:13, name:"英山县"},
   { id:2, pId:0, name:"湖南省", open:true},
   { id:21, pId:2, name:"长沙市", open:true},
   { id:211, pId:21, name:"芙蓉区"},
   { id:212, pId:21, name:"天心区"},
   { id:213, pId:21, name:"岳麓区"},
   { id:214, pId:21, name:"开福区"},
   { id:22, pId:2, name:"株洲市"},
   { id:221, pId:22, name:"天元区"},
   { id:222, pId:22, name:"荷塘区"},
   { id:223, pId:22, name:"芦淞区"},
   { id:224, pId:22, name:"石峰区"}
  ];
  $(document).ready(function(){
   $.fn.zTree.init($("#baseTree"), setting, zNodes);
  });
  /**
   * 单独选中根节点中第一个节点
   */
  function selectNodes()
  {
   var treeObj = $.fn.zTree.getZTreeObj("baseTree");
   //获取节点
   var nodes = treeObj.getNodes();
   if (nodes.length>0)
   {
    var node = treeObj.selectNode(nodes[0]);
    alert(node);
   }
  }
  //-->
 </script>
 </head>
<body>
<div class="content_wrap">
 <div class="zTreeDemoBackground left">
  <ul id="baseTree" class="ztree" style="height: 300px; width:200px; overflow-y: auto"></ul>
  <input type="button" id="btn" onclick="selectNodes()" value="单独选中根节点中第一个节点"/>
 </div>
</div>
</body>
</html>

2、实现效果图：

3、源码说明

单独选中根节点中第一个节点

var node = treeObj.selectNode(nodes[0]);

附：zTree_v3插件点击此处本站下载。

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希望本文所述对大家jQuery程序设计有所帮助。