参考博客：https://www.cnblogs.com/henuyuxiang/p/6677397.html

前台代码

<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%>

<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">

<html>

<head>

<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">

<link rel="stylesheet" href="resources/zTreeStyle/zTreeStyle.css" type="text/css">

<link rel="stylesheet" type="text/css" href="resources/bootstrap/bootstrap.min.css">

<title>index</title>

</head>

<body>

    <div class="container">

        <h4>Ztree异步加载使用例子</h4>

        <input type="text" id="search" /> &nbsp; <input type="button" id="btn" value="搜素" onclick="search()"/>

        <ul id="zTree" class="ztree"></ul>

    </div>

</body>

<script src="resources/js/jquery.min.js"></script>

<script type="text/javascript" src="resources/js/jquery.ztree.all.min.js"></script>

<script type="text/javascript" src="resources/js/jquery.ztree.exhide.min.js"></script>

<script type="text/javascript">

var setting = {

        async: {

            enable: true,

            url:"asyncGetNodes",

            autoParam:["id", "pid", "name"],

            dataFilter: filter

        },

        data:{

            simpleData:{

                enable: true,

                idKey:'id',

                pIdKey:'pid',

                rootPId: 0

            }

        },

        view:{

            showIcon: false

        },

        callback: {

            onNodeCreated: zTreeOnNodeCreated

          }

};

$(document).ready(function(){

    initZTree();

});

/**

 * 搜索

 */

function search(){

    var param = $.trim($("#search").val());

    var treeObj = $.fn.zTree.getZTreeObj("zTree");

    if(param != ""){

        param = encodeURI(encodeURI(param));

        treeObj.setting.async.otherParam=["param", param];

      }else {

        //搜索参数为空时必须将参数数组设为空

        treeObj.setting.async.otherParam=[];

      }

      treeObj.reAsyncChildNodes(null, "refresh");

}

function zTreeOnNodeCreated(event, treeId, treeNode){

    var param = $.trim($("#search").val());

    var treeObj = $.fn.zTree.getZTreeObj(treeId);

    if(param!="" && treeNode.isParent){

        treeObj.reAsyncChildNodes(treeNode, "refresh",false);

    }

}

function filter(treeId, parentNode, childNodes) {

    return childNodes;

}

//初始化树

function initZTree(){

    $.ajax({

          url:"asyncGetNodes",

          type:"post",

          dataType: "json",

          success: function(data){

              console.log(data);

              var zTreeObj = $.fn.zTree.init($("#zTree"),setting, data);

              //让第一个父节点展开

              var rootNode_0 = zTreeObj.getNodeByParam('pid',0,null);

              zTreeObj.expandNode(rootNode_0, true, false, false, false);

          },

          error: function(){

          }

      });

}

</script>

</html>

Node.java:

package com.test.model;

public class Node {

    private String id;

    private String pid;

    private String name;

    private String open;

    private String isParent;

    public Node(String id, String pid, String name, String open, String isParent) {

        super();

        this.id = id;

        this.pid = pid;

        this.name = name;

        this.open = open;

        this.isParent = isParent;

    }

    public String getId() {

        return id;

    }

    public void setId(String id) {

        this.id = id;

    }

    public String getPid() {

        return pid;

    }

    public void setPid(String pid) {

        this.pid = pid;

    }

    public String getName() {

        return name;

    }

    public void setName(String name) {

        this.name = name;

    }

    public String getOpen() {

        return open;

    }

    public void setOpen(String open) {

        this.open = open;

    }

    public String getIsParent() {

        return isParent;

    }

    public void setIsParent(String isParent) {

        this.isParent = isParent;

    }

}

后台代码：

package com.cy.controller;

import java.util.ArrayList;

import java.util.List;

import org.springframework.stereotype.Controller;

import org.springframework.web.bind.annotation.RequestMapping;

import org.springframework.web.bind.annotation.ResponseBody;

import com.alibaba.fastjson.JSON;

import com.test.model.Node;

@Controller

public class ZtreeController {

    @RequestMapping("/asyncGetNodes")

    @ResponseBody

    public List<Node> asyncGetNodes(String id, String pid, String name) throws Exception{

        List<Node> nodeList = new ArrayList<Node>();

        if(id==null){

            nodeList.add(new Node("1","0","硬件规格","false","true"));

            nodeList.add(new Node("2","0","软件规格","false","true"));

            return nodeList;

        }

        if(id.equals("1")){

            nodeList.add(new Node("10","1","单板","false","true"));

            nodeList.add(new Node("11","1","子卡","false","true"));

            nodeList.add(new Node("12","1","设备","false","true"));

        }else if(id.equals("2")){

            nodeList.add(new Node("20","2","java","false","true"));

            nodeList.add(new Node("21","2","jscript","false","true"));

            nodeList.add(new Node("22","2","php","false","true"));

        }else if(id.equals("10")){

            nodeList.add(new Node("100",id,"单板_00","false","true"));

            nodeList.add(new Node("101",id,"单板_00","false","false"));

        }else if(id.equals("100")){

            nodeList.add(new Node("1000",id,"单板_00_00","false","false"));

        }

        Thread.sleep(1000);

        return nodeList;

    }

}

说明：

1.通过在otherParam数组中设值的方式将搜索参数带到后台（无参数时必须将otherParam设为空数组否则一直会将前一次的参数带到后台）；

2.在结点创建完成后的回调函数onNodeCreated中进行手动异步加载。每个节点都进行异步加载，这时候带上搜索的关键字进行查询，达到搜索目的；

3.我这边第一次因为要将第一个父节点展开，所以第一次请求第一级父级节点，然后手动$.fn.zTree.init($("#zTree"),setting, data)，这时候expandNode第一个父级节点，是自动异步加载的；

4.如果点击搜索，自动带上param参数，这个参数就是搜索的关键字，然后每个节点创建时候触发onNodeCreated事件，每个节点只要是父节点，都会进行异步加载；

5.我这边后台没有写根据param进行查询，仅仅是一个例子而已。真正根据param去查询就行了。

初始化的时候默认加载第一个父级节点：

搜索的时候加载全部节点，要包含节点名字:

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