Sharing the use of zTree tree plug-in in jQuery

Sharing instructions:

The project needs to display the data returned by the background in the form of a tree view; and implement clicking on the node to add the node information to the ul on the right; wait for subsequent submissions to obtain and use; choose to be able to achieve asynchronous The zTree plug-in for loading node information has proven to be powerful enough to meet almost all needs. When I first came into contact with it, I read many people’s sharing and combined it with the official api documentation, I finally realized the function. Now I will share the summary of my learning. .

Effect introduction; In addition to the default effects of zTree, some practical operations are added using the API; including accordion effects; click on the parent node to expand the effect; click on the node text associated check box effect; display of the number of first-level child nodes Effect.

External resources introduced

1     <link rel="stylesheet" href="./zTree_v3-master/css/zTreeStyle/zTreeStyle.css">
2     <script type="text/javascript" src="./jquery-1.9.1.js"></script>
3     <script type="text/javascript" src="./zTree_v3-master/js/jquery.ztree.all.min.js"></script>

html partial code

<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 code

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 code

//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=&#39;node_name&#39;]").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);
});

Background php code; I am purely front-end, and I can only write simple background code;

<?php

$pId = $_POST[&#39;id&#39;];

if($pId == 4){
    $array = array(&#39;{"name":"数据表_一","id":"1_1","pid":"0"}&#39;,&#39;{"name":"数据表_二","id":"1_2","pid":"0"}&#39;,&#39;{"name":"数据表_三","id":"1_3","pid":"0"}&#39;,&#39;{"name":"数据表_四","id":"1_4","pid":"0"}&#39;,&#39;{"name":"数据表_五","id":"1_5","pid":"0"}&#39;);
}else if($pId == 1){
    $array = array(&#39;{"name":"测试表_一","id":"2_1","pid":"1"}&#39;,&#39;{"name":"测试表_二","connect":"测试表_一","id":"2_2","pid":"1"}&#39;,&#39;{"name":"测试表_三","id":"2_3","pid":"1"}&#39;,&#39;{"name":"测试表_四","id":"2_4","pid":"1"}&#39;,&#39;{"name":"测试表_五","id":"2_5","pid":"1"}&#39;);
}else if($pId == 2){
    $array = array(&#39;{"name":"信息表_一","id":"3_1","pid":"3"}&#39;,&#39;{"name":"信息表_二","id":"3_2","pid":"3"}&#39;,&#39;{"name":"信息表_三","id":"3_3","pid":"3"}&#39;,&#39;{"name":"信息表_四","id":"3_4","pid":"3"}&#39;,&#39;{"name":"信息表_五","id":"3_5","pid":"3"}&#39;,&#39;{"name":"信息表_五_一","id":"3_5_1","pid":"3_5"}&#39;,&#39;{"name":"信息表_五_二","id":"3_5_2","pid":"3_5"}&#39;,&#39;{"name":"信息表_三_一","id":"3_3_1","pid":"3_3"}&#39;,&#39;{"name":"信息表_三_二","id":"3_3_2","pid":"3_3"}&#39;,&#39;{"name":"信息表_三_三","id":"3_3_3","pid":"3_3"}&#39;);
}else if($pId == 3){
    $array = array(&#39;{"name":"作废表_一","id":"4_1","pid":"3"}&#39;,&#39;{"name":"作废表_二","id":"4_2","pid":"3"}&#39;,&#39;{"name":"作废表_三","id":"4_3","pid":"3"}&#39;);
}

echo json_encode($array);

Most of the js code has comments; detailed API can be viewed on the zTree official website and enter the official API document. The code needs to be run in a server environment;

Final chestnut renderings

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