第三方开源插件zTree的使用

zTree实现树形节点勾选效果图

使用流程：

JS文件导入和引用
css文件导入和引用
demo代码
JS、css文件导入和引用

3个核心JS文件及两个核心css文件
demo相关代码：

<!DOCTYPE html>
<html>
<head>
    <meta charset="utf-8" />
    <title></title>
</head>

<body>
    <script src="js/jquery-3.3.1.min.js"></script>
    <script src="js/jquery.ztree.core.js"></script>
    <script src="js/jquery.ztree.excheck.js"></script>

    <link href="css/demo.css" rel="stylesheet" />
    <link href="css/zTreeStyle/zTreeStyle.css" rel="stylesheet" />

    <div class="modal-body">
        <ul id="treeDemo" class="ztree" style="260px; overflow:auto;"></ul>
    </div>

    <button id="clickThis" type="button">点我</button>
</body>
</html>

<script type="text/javascript">
      var setting = {
          check: {
             enable: true
          },
          data: {
             simpleData: {
                enable: true
             }
          }
      };

      var zNodes =[
          { id:1, pId:0, name:"can check 1",open:true},
          { id:11, pId:1, name:"can check 1-1", open:true},
          { id:111, pId:11, name:"can check 1-1-1"},
          { id:112, pId:11, name:"can check 1-1-2"},
          { id:12, pId:1, name:"can check 1-2", open:true},
          { id:121, pId:12, name:"can check 1-2-1"},
          { id:122, pId:12, name:"can check 1-2-2"},
          { id:2, pId:0, name:"can check 2", checked:true, open:true},
          { id:21, pId:2, name:"can check 2-1"},
          { id:22, pId:2, name:"can check 2-2", open:true},
          { id:221, pId:22, name:"can check 2-2-1", checked:true},
          { id:222, pId:22, name:"can check 2-2-2"},
          { id:23, pId:2, name:"can check 2-3"}
      ];

      function setCheck() {
          var zTree = $.fn.zTree.getZTreeObj("treeDemo"),
          type = { "Y":'ps', "N":'ps'};
          zTree.setting.check.chkboxType = type;
      }

      $(document).ready(function(){
          $.fn.zTree.init($("#treeDemo"), setting, zNodes);
          setCheck();
    });

    $("#clickThis").click(function () {
        var treeObj = $.fn.zTree.getZTreeObj("treeDemo");
        // 获取选中的节点
        nodes = treeObj.getCheckedNodes(true);
        console.log("获取选中的节点");
        console.log(nodes);

        // 获取选中节点的id
        v = "";
        arr1 = [];
        for (var i = 0; i < nodes.length; i++) {
            v += nodes[i].name + ",";//获取选中节点的name值
            alert(nodes[i].id);    //获取选中节点的id值
            arr1.push(nodes[i].id);
        }
        console.log("获取选中节点的name值");
        console.log(v);
        console.log("获取选中节点的id值");
        console.log(arr1);

        // 获取所有节点的id
        code = $("#tree").data("id");
        arr2 = [];
        for (var i in code) {
            console.log(code[i].id);
            arr2.push(code[i].id);
        }
        console.log("获取所有节点的id");
        console.log(arr2);

        // 获取没有选中节点的id
        arr3 = [];
        for (var x = 0; x < arr2.length; x++) {
            a = $.inArray(arr2[x], arr1);
            if (a == -1) {
                arr3.push(arr2[x]);
            }
        }
        console.log("获取没有选中节点的id");
        console.log(arr3);


    });

</script>