内部平台的一个小功能点的实现过程，分享给大家：
递归解析Json，可以实现生成可视化Tree+快速获取JsonPath。
步骤：
1.利用JsonPath读取根，获取JsonObject
2.递归层次遍历JsonObjec，保存结点信息
3.利用zTree展示结点为可视化树，点击对应树的结点即可获取对应结点的JsonPath
1.利用JsonPath读取根，获取JsonObject
示例Json：
{
"errorMessage": null,
"errorCode": null,
"dates": {
"tradeAmt": null,
"riskLevel": "LEVEL30",
"optSelected": {
"77": [
{
"optionContent": "20-50万元",
"productCode": null,
"created": null,
"optionOrder": null,
"modified": null,
"id": 361,
"optionScore": 8,
"isInvalid": 1
}
],
"78": [
{
"optionContent": "资产50-500万元，无债务或债务较轻",
"productCode": null,
"created": null,
"optionOrder": null,
"modified": null,
"id": 365,
"optionScore": 6,
"isInvalid": 1
}
]
},
"riskInfoResult": {
"optLetter": "A",
"mqOrder": "1",
"residenceCountryCode": null,
"taxReason": null,
"residenceCountryName": null,
"residenceCountryNameEn": null,
"countryNameEn": null,
"taxInfoCode": null,
"taxInfoIsCompleted": true,
"taxInfoIsRight": true,
"countryCode": null,
"taxId": null,
"countryName": null,
"taxReasonInt": null
},
"created": 1565654328000,
"questions": [
{
"questionContent": "您的职业？",
"productCode": null,
"created": 1498630051000,
"options": null,
"questionSource": "BUSINESS",
"modified": 1498630051000,
"id": 75,
"isInvalid": 1,
"questionType": 1,
"order": 1
},
{
"questionContent": "您的主要收入来源是？",
"productCode": null,
"created": 1498630051000,
"options": null,
"questionSource": "BUSINESS",
"modified": 1498630051000,
"id": 76,
"isInvalid": 1,
"questionType": 1,
"order": 2
}
],
"serialCode": "123",
"isInvalid": 1,
"expireTime": 1628783999000,
"productCode": null,
"modified": 1565654328000,
"examScore": 56,
"id": 4564568,
"results": {
"77": "361",
"78": "365"
},
"account": "test"
},
"status": "SUCCESS"
}
Java代码：
String jsonStr = "";
Object rootJson = JsonPath.read(jsonStr, "$");
2.递归层次遍历JsonObjec，保存结点信息
Java代码
ZTreeNode zTreeNode = new ZTreeNode();
zTreeNode.setId("$");
zTreeNode.setpId("root");
zTreeNode.setName("root");
zTreeNode.setDepth(0);
zTreeNode.setPath("$");
traverseTree(rootJson, zTreeNode, zTreeNodes);
public static void traverseTree(Object rootJson, ZTreeNode zTreeNode, List<ZTreeNode> zTreeNodes) {
if (rootJson instanceof Map) {
for (Map.Entry<String, Object> stringObjectEntry : ((Map<String, Object>) rootJson).entrySet()) {
ZTreeNode zTreeNodeTemp = new ZTreeNode();
zTreeNodeTemp.setDepth(zTreeNode.getDepth() + 1);
zTreeNodeTemp.setPath(zTreeNode.getPath() + "." + stringObjectEntry.getKey());
zTreeNodeTemp.setId(zTreeNodeTemp.getPath());
zTreeNodeTemp.setName(stringObjectEntry.getKey());
zTreeNodeTemp.setpId(zTreeNode.getPath());
zTreeNodes.add(zTreeNodeTemp);
traverseTree(stringObjectEntry.getValue(), zTreeNodeTemp, zTreeNodes);
}
} else if (rootJson instanceof List) {
List json = (List) rootJson;
for (int i = 0; i < json.size(); i++) {
Object obj = json.get(i);
ZTreeNode zTreeNodeTemp = new ZTreeNode();
zTreeNodeTemp.setDepth(zTreeNode.getDepth() + 1);
zTreeNodeTemp.setPath(zTreeNode.getPath() + "[" + i + "]");
zTreeNodeTemp.setId(zTreeNodeTemp.getPath());
zTreeNodeTemp.setName(zTreeNode.getName() + "[" + i + "]");
zTreeNodeTemp.setpId(zTreeNode.getPath());
zTreeNodes.add(zTreeNodeTemp);
traverseTree(obj, zTreeNodeTemp, zTreeNodes);
}
} else {
// do nothing
}
}
3.利用zTree展示结点为可视化树，点击对应树的结点即可获取对应结点的JsonPath
前端代码：
let zTreeObj;
// zTree 的参数配置
let setting = {
data: {
simpleData: {
enable: true
}
},
callback: {
onClick: zTreeOnClick
}
};
zTreeObj = $.fn.zTree.init($("#using_json"), setting, zNodes);
zTreeObj.expandAll(true);
4.扩展：将结点信息反向解析
递归解析zNodes+利用nestable插件可视化展示，效果如下：
前端代码：
let detailResult = JSON.parse(zNodes);
let nestableContent = $('<ol class="dd-list"></ol>');
let dataId = 0;
// 遍历解析Json
function parseJson(jsonObj, nestableContent, dataId) {
for (let key in jsonObj) {
let element = jsonObj[key];
if (element === null) {
element = "null";
}
if (element.length > 0 && typeof (element) == "object" || typeof (element) == "object") {
var li = $('<li class="dd-item" data-id="' + dataId + '"></li>');
$(li).append(' <div class="dd-handle">' +
' <span class="bg-muted p-xs b-r-sm">' + key + '</span>' +
' </div>').append('<ol class="dd-list"></ol>').appendTo(nestableContent);
parseJson(element, $(li).children().eq(1), dataId);
} else {
dataId++;
$('<li class="dd-item" data-id="' + dataId + '"></li>').append(' <div class="dd-handle">' +
' <span class="bg-muted p-xs b-r-sm">' + key + '</span>' + element +
' </div>').appendTo(nestableContent);
}
}
}
作者：京东科技 周波
来源：京东云开发者社区 转载请注明来源
