zTree获得选择节点的值以及回显选中

<script>
function filter(node) {   //过滤器直选中2级节点累加
    return (node.level == 2 && node.checked == true);
}
 
var setting = {	         //设置
    check: {
	enable: true
    },
    callback: {
        onCheck: onCheck
}};
 
function onCheck(e, treeId, treeNode){  //这是将所有选中节点的名字 用,分割做拼接 用于持久化到数据库
     var zTree = $.fn.zTree.getZTreeObj("tree").getNodesByFilter(filter);
     var choose = "";
     for (var i=0;i<zTree.length;i++) {
         if(zTree[i].name !=null)
	 choose +=(i == (zTree.length-1))?zTree[i].name:zTree[i].name+",";
     }
     $("#ztreesnames").val(choose);
     treeIds();
}
 
function treeIds(){                      //这是将选中的节点的id用;分割拼接起来,用于持久化到数据库
   var zTreeO =  $.fn.zTree.getZTreeObj("tree").getNodesByFilter(filter);
   var idListStr = "";
   for (var i = 0; i < zTreeO.length; i++) {
      if (zTreeO[i].id != null) {
	 idListStr+= (i == (zTreeO.length-1))?zTreeO[i].id:zTreeO[i].id+";";
      }
   };
   $("#ztreeids").val(idListStr);
};
 
 
$(document).ready(function(){ /**这是处理回显选中的方法*/
    $.fn.zTree.init($("#tree"), setting, zNodes);			
    var zTreeObj = $.fn.zTree.getZTreeObj("tree")
    var zTree = zTreeObj.getCheckedNodes(false);
    var pid= "${personCode}"; /**此处数据前后必须拼接;*/
    for (var i = 0; i < zTree.length; i++) {
        if (pid.indexOf(";" + zTree[i].id + ";") != -1) {
                    zTreeObj.expandNode(zTree[i], true); //展开选中的
                    zTreeObj.checkNode(zTree[i], true);					
        }
    }
   onCheck();
});
</script>

<script>
function filter(node) {   //过滤器直选中2级节点