JSON数据生成树——（四）

1.页面中准备树的div

<div class="user_left_tree_info">
                <div class="user_left_tree_info_title">部门</div>
                <div class="hr"></div>
                <div class="ztree" id="treeDemo"></div>
            </div>

 2.页面加载时候请求树:

searchUnitTree();

/**
     * 请求树信息
     */
    function searchUnitTree(){
        $.ajax({
            type : "post",
            target : "#treeDemo",
            dataType : "json",
            url : "searchTreeAction2.action",
            success : getTree
        });
    }
            
    /**
     * 生成树
     */
    function getTree(treeList2){
        var treeList3 = eval("(" + treeList2 + ")");
        var setting = {
                data : {
                    simpleData : {
                        enable : true,
                        idKey: "unitId",
                        pIdKey: "upUnitId",
                        rootPId : "10",
                    },
                    key : {
                        name : "unitName",
                    }
                },
                callback : {
                    onClick : onClick
                }
        };
        var zNodes = treeList3;

        //添加 树节点的 点击事件；
        var log, className = "dark";
        function onClick(event, treeId, treeNode, clickFlag) {
            clickOnTree(event, treeId, treeNode, clickFlag);
        }
        $.fn.zTree.init($("#treeDemo"), setting, zNodes);

        var treeObj = $.fn.zTree.getZTreeObj("treeDemo");  
        treeObj.expandAll(true);
    }
    
    /**
     * 点击树节点的同时，将该部门信息对应的部门编号，部门名称，上级部门编号，上级部门名称保存下来
     */
    function clickOnTree(event, treeId, treeNode, clickFlag){
        //得到该节点的部门编号和部门名字
        document.getElementById("bt_unitId").value = treeNode.unitId;
        document.getElementById("bt_unitName").value = treeNode.unitName;
        /*alert(treeNode.unitId);
        alert(treeNode.unitName);*/
        if (treeNode.unitId == "10") {
            //如果本节点是根节点，那么就不能执行更新和删除操作
            $("#unit_change,#unit_delete").attr("disabled","disabled");
        } else {
            //如果本节点不是根节点，就可以执行更新和删除操作
            $("#unit_change,#unit_delete").removeAttr("disabled");
            //父节点
            var fatherNode=treeNode.getParentNode();
            /*alert(fatherNode.unitId);
            alert(fatherNode.unitName);*/
            //得到父节点的部门编号和部门名称
            document.getElementById("bt_upUnitId").value = fatherNode.unitId;
            document.getElementById("bt_upUnitName").value = fatherNode.unitName;
        }
        searchUnit();
    }

    /**
     *  点击一下树节点表格输出下级节点的部门信息
     */
    function searchUnit() {
        $.ajax({
            type : "post",
            dataType : "json",
            url : "searchUnitByUpId.action",
            data : {
                upUnitId : $("#bt_unitId").val(),
            },
            success : showTable
        });
    }

3.后台传JSON串

public String  searchTree(){
         try {
            this.treeList =unitService.getUnitTree2();
        } catch (SQLException e) {
            e.printStackTrace();
        }
        JSONArray jsonArray = JSONArray.fromObject(treeList);
        this.treeList2 = jsonArray.toString();
        return SUCCESS;
     }

结果:

[{"upUnitId":"","unitName":"中心","unitId":"10"},{"upUnitId":"10","unitName":"人才","unitId":"10001"},{"upUnitId":"10","unitName":"项部","unitId":"10002"},{"upUnitId":"10","unitName":"成果","unitId":"10003"},{"upUnitId":"10","unitName":"SS","unitId":"10009"}]