zTree jQuery 树插件的使用(实例讲解)

<link rel="stylesheet" href="./zTree_v3-master/css/zTreeStyle/zTreeStyle.css" rel="external nofollow" >
<script type="text/javascript" src="/UploadFiles/2021-04-02/jquery-1.9.1.js">


html部分代码


<div class="box">
    <ul id="treeDemo" class="ztree"></ul>
    <ul id="ulright">
      <li style="text-align: center;background-color: #ddd;border-bottom: 1px dashed">已选择</li>
    </ul>
  </div>


css代码


ul,li,body{
    margin: 0;
    padding: 0;
  }
  .ztree li span.node_name {
    font-size: 16px;
  }
  .box{
    width: 500px;
    margin:10px auto;
    border:3px solid #ccc;
    padding: 20px;
    border-bottom: none;
  }
  #treeDemo{
    width: 200px;
    display: inline-block;
    background-color: #f1f1f1;
    min-height: 200px;
  }
  #ulright{
    width: 200px;
    margin-left: 50px;
    min-height: 200px;
    border:1px solid #ccc;
    display: inline-block;
    vertical-align: top;
    background-color: #eeeee8;
  }
  #ulright li{
    width: 100%;
    height: 30px;
    list-style: none;
    line-height: 30px;
    margin-bottom: 3px;
    background-color: #00b6ba;
    padding-left: 10px;
    box-sizing: border-box;

  }


  /**/
  .ztree li a.curSelectedNode{
    background-color: transparent;
    border:#00b6ba;
  }
  .ztree li span.node_name{
    font-size: 18px;
    line-height: 18px;
    color: #000;
  }
  .ztree li a{
    padding: 5px;
    vertical-align: middle;
  }
  .ztree li a:hover{
    text-decoration: none;
  }
  .ztree li span.button.chk{
    margin: 9px 3px;
  }


js代码


//递归找到所有节点(非父节点)
function getAllChildrenNodes(treeNode,result){
   if (treeNode.isParent) {
    var childrenNodes = treeNode.children;
    if (childrenNodes) {
      for (var i = 0; i < childrenNodes.length; i++) {
        if(!childrenNodes[i].children){
          result.push(childrenNodes[i].name);
        }
        result = getAllChildrenNodes(childrenNodes[i], result);
      }
    }
  }
  return result;
}
var parames = 3;
//zTree的所有配置
var setting = {
  //zTree 的唯一标识，初始化后，等于 用户定义的 zTree 容器的 id 属性值。
  treeId:"",
  //zTree 容器的 jQuery 对象，主要功能：便于操作,内部参数,不可修改
  treeObj:null,
  //异步请求数据配置;当父节点没有子节点时;点击此父节点会触发请求
  async:{
    //打开此功能
    enable: true,
    url:"./zTreeDemoV9.0SimpleFromV10.0.php",
    type:"post",
    //发送的父级id的字段定义;如修改,遵循格式autoParam: ["id=parentId"]
    autoParam: ["id"],
    //其他需要提交的参数["name","topic","key","ss"]转换后格式为name=topic&key=ss
    otherParam:["json",parames || 1,"test","2"],
    dataType:"json",
    contentType: "application/x-www-form-urlencoded",
    //ajax请求后的数据预处理函数
    dataFilter: function(treeId,parentNode,responseData){
      for(var i=0;i<responseData.length;i++){
        responseData[i] = JSON.parse(responseData[i])
      }
      return responseData;
    }
  },
  //数据配置
  data: {
    simpleData: {
      enable: true,
      idKey: "id", //修改默认的ID为自己的id
      pIdKey: "pid", //修改默认父级ID为自己数据的父级id
      rootPId: 0 //根节点的父节点id
    }
  },
  //视图配置
  view: {
    //是否显示节点前的图标
    showIcon: false,
    //节点上a标签的样式
    fontCss: {
    }
  },
  //选框配置
  check: {
    //启用复选框
    enable: true,
    //chkStyle:"radio"
    //复选框父子级选择联动设置
    chkboxType: { "Y": "ps", "N": "ps" }
  },
  //事件配置
  callback: {
    //点击复选框之前的事件
    beforeCheck:function(treeId, treeNode){//如果节点是父节点,并且勾选时没有子节点,则不允许勾选;针对父节点没有展开,则没有异步加载子节点,此情况禁止点击父节点全选子节点的操作
      if(treeNode.isParent && !treeNode.children){
        return false;
      }
    },
    //回调错误事件
    onAsyncError: function(event, treeId, treeNode, XMLHttpRequest, textStatus, errorThrown){
      alert("初始化节点数据失败,请稍后重试");
    },
    //回调成功事件
    onAsyncSuccess: function(event, treeId, treeNode, resData){
      var zTree = $.fn.zTree.getZTreeObj("treeDemo");
      console.log("数据加载成功");
      var count = (treeNode.children.length);
      //加载成功后;在节点后面显示此父节点下有几个一级子节点
      $(".ztree").find("a[title="+treeNode.name+"]").find("span[class='node_name']").html(treeNode.name+"<span>("+count+")</span>");
    },
    //父节点展开时的事件
    onExpand: function(event, treeId, treeNode){
      //zTree对象
      var zTree = $.fn.zTree.getZTreeObj("treeDemo");
      //获取点击的id
      var nowId = treeNode.id;
      //获取所有节点
      var allNodes = zTree.getNodes();
      //获取点击节点的层级
      var level = treeNode.level;
      //定义过滤函数;获取节点层级与点击节点层级相同并且为父节点的节点
      function filter(node) {
        return (node.level == treeNode.level && node.isParent);
      }
      //获得点击节点同级的父节点的集合
      var sameLevelNodes = zTree.getNodesByFilter(filter);
      //遍历同级节点集合
      for(var i=0;i<sameLevelNodes.length;i++){
        //将非被点击父节点收起;实现手风琴效果
        if(sameLevelNodes[i].id != nowId){
          zTree.expandNode(sameLevelNodes[i], false, true, true);
        }
      }
    },
    //点击事件
    onClick: function(e, treeId, treeNode, clickFlag) {
      //tree实例
      var zTree = $.fn.zTree.getZTreeObj("treeDemo");
      //点击文字关联复选框
      //如果不是父节点,则关联,或者是父节点,但展开状态位true是,也关联;
      if(!treeNode.isParent || (treeNode.isParent && treeNode.open)){
        zTree.checkNode(treeNode, !treeNode.checked, true);//点击文字关联复选框
      }
      //点击文字展开当前节点
      zTree.expandNode(treeNode, true, true, true);
      // zTree.reAsyncChildNodes(treeNode, "refresh");//强行异步加载(存在子节点也进行加载)
      //手风琴效果;直接调用onExpand
      zTree.setting.callback.onExpand(e, treeId, treeNode);

      //点击节点名称和勾选节点前面的复选框逻辑相同;
      //直接在onClick里面调用onCheck函数;并传入所需参数
      zTree.setting.callback.onCheck(e, treeId, treeNode);
    },
    //点击复选框事件
    onCheck: function(e, treeId, treeNode) {
      //获取右侧ul内所有li标签;用于比较当前选择复选框在右侧是否一斤存在
      var rightLi = $("#ulright").find("li");
      //选中的是底层节点;
      if(!treeNode.isParent){
        //选中状态,加入到右侧
        if(treeNode.checked){
          //遍历右侧li,如果选中的已经存在;return
          for(var i=0;i<rightLi.length;i++){
            if($(rightLi[i]).attr("title") == treeNode.name){
              return;
            }
          }
          // 创建li 追加li
          var addLi = $("<li title="+treeNode.name+"><span></span>");
          addLi.find("span").text(treeNode.name);
          addLi.animate({
            width:"100%",
            height:"30"
          },400)
          addLi.appendTo($("#ulright"));
          //如果点击的节点存在connect字段;判断复选框状态加入到右侧ul或删除
          if(treeNode.connect){
            //遍历右侧li,如果选中的已经存在;return
            for(var i=0;i<rightLi.length;i++){
              if($(rightLi[i]).attr("title") == treeNode.connect){
                return;
              }
            }
             // 创建li 追加li
            var addLi = $("<li title="+treeNode.connect+"><span></span>");
              addLi.find("span").text(treeNode.connect);
              addLi.animate({
                width:"100%",
                height:"30"
              },400)
            addLi.appendTo($("#ulright"));
          }
          //将被勾选的节点背景颜色更改
          $("#treeDemo").find("a[title="+treeNode.name+"]").css("backgroundColor","#00b6ba");
        //非选中状态,删除
        }else{
          //将右侧的次节点对应的li删除
          $("#ulright").find("li[title="+treeNode.name+"]").animate({
            width:"0%",
            height:"0"
          },400,function(){
            $("#ulright").find("li[title="+treeNode.name+"]").remove();
          })
          //取消此节点的背景颜色
          $("#treeDemo").find("a[title="+treeNode.name+"]").css("backgroundColor","");
        }
      //选中的是父节点;获取所有子节点(非父节点),判断复选框状态加入到右侧ul或删除
      }else{
        //调用递归函数;获取所有非父级子节点数组集合
        var addNodesArray = getAllChildrenNodes(treeNode,[]);
        //是选中状态,加入到右侧ul
        if(treeNode.checked){
          //定义存储右侧li的数组
          var rightLiArray = [];
          $("#ulright li").each(function(i,v){
            rightLiArray.push($(v).attr("title"))
          })
          rightLiArray = rightLiArray.slice(1);
          //遍历勾选的数组集合
          for(var i=0;i<addNodesArray.length;i++){
            //判断此节点是否在右侧ul内;不存在则加入
            if(rightLiArray.indexOf(addNodesArray[i]) == -1){
              //创建li 追加li
              var addLi = $("<li title="+addNodesArray[i]+"><span>"+addNodesArray[i]+"</span>");
              addLi.animate({
                width:"100%",
                height:30
              },400)
              addLi.appendTo($("#ulright"));
            }
            //将节点背景颜色修改
            $("#treeDemo").find("a[title="+addNodesArray[i]+"]").css("backgroundColor","#00b6ba");
          }
        //是非选中状态,删除
        }else{
          //遍历节点,执行删除操作
          for(var i=0;i<addNodesArray.length;i++){
            $("#ulright").find("li[title="+addNodesArray[i]+"]").animate({
              width:"0%",
              height:0
            },function(){
              $(this).css("display","none");
              $(this).remove();
            })
            //还原背景颜色
            $("#treeDemo").find("a[title="+addNodesArray[i]+"]").css("backgroundColor","");
          }
        }
      }
    },
  }

};
//zTree的节点信息;可一次性全部加载;可试试异步请求
var zNodes = [{
      name: "数据表",//名称
      id: 4,//id,子元素的pid
      isParent:true,//是否为父节点,默认为false
      pid:0//父节点id;data中的rootPId;
    },{
      name: "测试表",
      id: 1,
      isParent:true,
      pid:0
    },{
      name: "信息表",
      id: 2,
      isParent:true,
      pid:0
    },{
      name: "作废表",
      id: 3,
      isParent:true,
      pid:0
    }];
$(document).ready(function() {
  //初始化zTree; zTree容器的jquery对象/ 配置/ 节点
  $.fn.zTree.init($("#treeDemo"), setting, zNodes);
});


后台php代码;本人纯前端,后台代码只会简单的写写;


<"name":"数据表_一","id":"1_1","pid":"0"}','{"name":"数据表_二","id":"1_2","pid":"0"}','{"name":"数据表_三","id":"1_3","pid":"0"}','{"name":"数据表_四","id":"1_4","pid":"0"}','{"name":"数据表_五","id":"1_5","pid":"0"}');
}else if($pId == 1){
  $array = array('{"name":"测试表_一","id":"2_1","pid":"1"}','{"name":"测试表_二","connect":"测试表_一","id":"2_2","pid":"1"}','{"name":"测试表_三","id":"2_3","pid":"1"}','{"name":"测试表_四","id":"2_4","pid":"1"}','{"name":"测试表_五","id":"2_5","pid":"1"}');
}else if($pId == 2){
  $array = array('{"name":"信息表_一","id":"3_1","pid":"3"}','{"name":"信息表_二","id":"3_2","pid":"3"}','{"name":"信息表_三","id":"3_3","pid":"3"}','{"name":"信息表_四","id":"3_4","pid":"3"}','{"name":"信息表_五","id":"3_5","pid":"3"}','{"name":"信息表_五_一","id":"3_5_1","pid":"3_5"}','{"name":"信息表_五_二","id":"3_5_2","pid":"3_5"}','{"name":"信息表_三_一","id":"3_3_1","pid":"3_3"}','{"name":"信息表_三_二","id":"3_3_2","pid":"3_3"}','{"name":"信息表_三_三","id":"3_3_3","pid":"3_3"}');
}else if($pId == 3){
  $array = array('{"name":"作废表_一","id":"4_1","pid":"3"}','{"name":"作废表_二","id":"4_2","pid":"3"}','{"name":"作废表_三","id":"4_3","pid":"3"}');
}

echo json_encode($array);


js代码大部分都有注释;详细api可在zTree官网查看 进入官方api文档 代码运行需在服务器环境下运行;
最终栗子效果图

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