递归解析任意层的Json数据，获取所有的key和value，Java实现

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有需要的可以自己下载看看，github代码：https://github.com/xianzhixianzhixian/JsonDemo.git
实习，需要做到几个功能：
1、从内容的Json字符串中获取所有的key和value
2、把未知的Json字符传转化为LinkedList<LinkedList<String>>类型的数据
首先我们面对的是一个未知的Json字符串，例如下面的这几串Json数据使用的样例数据

{"title": "新增的任务的表单信息", "type": "object", "properties": {"finishTime": {"type": "number", "title": "任务结束时间例如：1450708950086"}, "contactEmail": {"type": "string", "title": "联系人邮箱"}, "sexType": {"type": "string", "title": "招聘性别要求,FEMALE:女，MALE：男，UNKWON：男女不限"}, "enrollEndTime": {"type": "number", "title": "报名截止时间例如：1450708950086"}, "description": {"type": "string", "title": "备注"}, "weekday": {"type": "string", "title": "工作日期"}, "title": {"type": "string", "title": "任务标题"}, "startTime": {"type": "number", "title": "任务开始时间,例如：1450708950086"}, "contactTelephone": {"type": "string", "title": "联系人电话"}, "timeDescription": {"type": "string", "title": "工作时间描述"}, "paymentType": {"type": "string", "title": "支付类型 0：线上支付，1：线下支付"}, "addressList": {"items": {"properties": {"latitude": {"type": "string", "title": "纬度"}, "cityName": {"type": "string", "title": "城市名称"}, "areaName": {"type": "string", "title": "区域名称"}, "longitude": {"type": "string", "title": "经度"}, "address": {"type": "string", "title": "t工作地点"}}, "type": "object", "description": "任务地址"}, "type": "array", "title": "地址列表"}, "balanceUnit": {"type": "string", "title": "兼职金额单位；例如：元/小时，元/天等"}, "contactName": {"type": "string", "title": "联系人姓名"}, "content": {"type": "string", "title": "工作内容"}, "balance": {"type": "number", "title": "兼职金额"}, "headcount": {"type": "integer", "title": "招聘人数"}, "typeDesc": {"type": "string", "title": "任务类型描述: 只有在任务类型为其他时有效"}, "type": {"type": "string", "title": "任务类型；例如：传单派发，服务员等"}, "balanceType": {"type": "integer", "title": "结算类型；例如：完工结，日结等"}}}

{"type": "object", "properties": {"arg0": {"type": "string", "description": "", "title": ""}, "arg1": {"title": "", "type": "integer", "description": "", "format": "int32"}, "arg2": {"title": "", "type": "integer", "description": "", "format": "int64"}}}

{"type": "object", "properties": {"arg0": {"type": "string", "description": "", "title": ""}, "arg1": {"title": "", "type": "integer", "description": "", "format": "int32"}, "arg2": {"title": "", "type": "integer", "description": "", "format": "int64"}}}

{"items": {"type": "string"}, "type": "array"}

{"type": "object", "properties": {}}那我们要怎样去递归的获取其中所有的key和value呢？这时候JsonPath已经不起作用了，我们需要用原生的Json解析才行
1、pom文件的配置，所用到的jar包<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"> <modelVersion>4.0.0</modelVersion>

<groupId>com.yufeng.json</groupId>
<artifactId>JsonDemo</artifactId>
<version>1.0-SNAPSHOT</version>

<dependencies>
<dependency>
<groupId>commons-beanutils</groupId>
<artifactId>commons-beanutils</artifactId>
<version>1.9.3</version>
</dependency>
<dependency>
<groupId>commons-collections</groupId>
<artifactId>commons-collections</artifactId>
<version>3.2.1</version>
</dependency>
<dependency>
<groupId>commons-lang</groupId>
<artifactId>commons-lang</artifactId>
<version>2.6</version>
</dependency>
<dependency>
<groupId>commons-logging</groupId>
<artifactId>commons-logging</artifactId>
<version>1.1.1</version>
</dependency>
<dependency>
<groupId>net.sf.ezmorph</groupId>
<artifactId>ezmorph</artifactId>
<version>1.0.6</version>
</dependency>
<dependency>
<groupId>net.sf.json-lib</groupId>
<artifactId>json-lib</artifactId>
<version>2.2.3</version>
<classifier>jdk15</classifier><!-- 指定jdk版本 -->
</dependency>
</dependencies>
</project>2、程序的代码准备
递归读取未知Json字符串中所有的key和value，将其转化为LinkedList<LinkedList<String>>类型的数据package com.yufeng.json;

import net.sf.json.JSONArray;
import net.sf.json.JSONObject;

import java.util.Iterator;
import java.util.LinkedList;
import java.util.List;

/**
* Json工具类
* 钰丰 2018/2/5
*/
public class JsonUtil {

public static List<String> list=new LinkedList<String>();

/**
* 递归读取所有的key，某些限制可以自己除去，核心部分
* @param jsonObject
*/
public static void getAllKey(JSONObject jsonObject){
Iterator<String> keys=jsonObject.keys();
while(keys.hasNext()){
String key=keys.next();
if(isJsonObject(jsonObject.get(key).toString())){
if(!key.equals("properties") && !isArrayOrObject(jsonObject.get(key).toString())) {
System.out.println(key);
}
JSONObject innerObject=JSONObject.fromObject(jsonObject.get(key));
getAllKey(innerObject);
}
}
}

/**
* 从未知的JsonArray中获取LinkedList
* @return
*/
public static LinkedList<LinkedList<String>> getLinkedListFromJsonArray(String jsonArrayStr){

LinkedList<LinkedList<String>> linkedList=null;
if(jsonArrayStr!=null && jsonArrayStr.length()>0){
JSONArray jsonArray=JSONArray.fromObject(jsonArrayStr);
linkedList=new LinkedList<LinkedList<String>>();
for(int i=0;i<jsonArray.size();i++){
JSONArray array=JSONArray.fromObject(jsonArray.get(i));
LinkedList<String> internalList=new LinkedList<String&g
4000
t;();
for(int j=0;j<array.size();j++){
internalList.add(array.get(j).toString());
}
linkedList.add(internalList);
}
}
return linkedList;
}

/**
* 判断某个Json字符串是否为一个标准的Json字符串
* @param jsonString
* @return
*/
public static Boolean isJsonObject(String jsonString){
try{
JSONObject.fromObject(jsonString);
return true;
}catch (Exception e){
return false;
}
}

/**
* 判断某个Json字符串是否为一个Json数组
* @param jsonObject
* @return
*/
public static Boolean isArrayOrObject(String jsonObject){
String type=JSONObject.fromObject(jsonObject).get("type").toString();
if(type.equals("object") || type.equals("array")){
return true;
}else{
return false;
}
}
}

/*
给getAllKey使用的数据

{"title": "新增的任务的表单信息", "type": "object", "properties": {"finishTime": {"type": "number", "title": "任务结束时间例如：1450708950086"}, "contactEmail": {"type": "string", "title": "联系人邮箱"}, "sexType": {"type": "string", "title": "招聘性别要求,FEMALE:女，MALE：男，UNKWON：男女不限"}, "enrollEndTime": {"type": "number", "title": "报名截止时间例如：1450708950086"}, "description": {"type": "string", "title": "备注"}, "weekday": {"type": "string", "title": "工作日期"}, "title": {"type": "string", "title": "任务标题"}, "startTime": {"type": "number", "title": "任务开始时间,例如：1450708950086"}, "contactTelephone": {"type": "string", "title": "联系人电话"}, "timeDescription": {"type": "string", "title": "工作时间描述"}, "paymentType": {"type": "string", "title": "支付类型 0：线上支付，1：线下支付"}, "addressList": {"items": {"properties": {"latitude": {"type": "string", "title": "纬度"}, "cityName": {"type": "string", "title": "城市名称"}, "areaName": {"type": "string", "title": "区域名称"}, "longitude": {"type": "string", "title": "经度"}, "address": {"type": "string", "title": "t工作地点"}}, "type": "object", "description": "任务地址"}, "type": "array", "title": "地址列表"}, "balanceUnit": {"type": "string", "title": "兼职金额单位；例如：元/小时，元/天等"}, "contactName": {"type": "string", "title": "联系人姓名"}, "content": {"type": "string", "title": "工作内容"}, "balance": {"type": "number", "title": "兼职金额"}, "headcount": {"type": "integer", "title": "招聘人数"}, "typeDesc": {"type": "string", "title": "任务类型描述: 只有在任务类型为其他时有效"}, "type": {"type": "string", "title": "任务类型；例如：传单派发，服务员等"}, "balanceType": {"type": "integer", "title": "结算类型；例如：完工结，日结等"}}}

{"type": "object", "properties": {"arg0": {"type": "string", "description": "", "title": ""}, "arg1": {"title": "", "type": "integer", "description": "", "format": "int32"}, "arg2": {"title": "", "type": "integer", "description": "", "format": "int64"}}}

{"type": "object", "properties": {"arg0": {"type": "string", "description": "", "title": ""}, "arg1": {"title": "", "type": "integer", "description": "", "format": "int32"}, "arg2": {"title": "", "type": "integer", "description": "", "format": "int64"}}}

{"items": {"type": "string"}, "type": "array"}

{"type": "object", "properties": {}}
*/3、运行代码及结果展示public class JsonDemo {

public static void main(String[] args){
JSONObject jsonObject=JSONObject.fromObject("{\"title\": \"新增的任务的表单信息\", \"type\": \"object\", \"properties\": {\"finishTime\": {\"type\": \"number\", \"title\": \"任务结束时间例如：1450708950086\"}, \"contactEmail\": {\"type\": \"string\", \"title\": \"联系人邮箱\"}, \"sexType\": {\"type\": \"string\", \"title\": \"招聘性别要求,FEMALE:女，MALE：男，UNKWON：男女不限\"}, \"enrollEndTime\": {\"type\": \"number\", \"title\": \"报名截止时间例如：1450708950086\"}, \"description\": {\"type\": \"string\", \"title\": \"备注\"}, \"weekday\": {\"type\": \"string\", \"title\": \"工作日期\"}, \"title\": {\"type\": \"string\", \"title\": \"任务标题\"}, \"startTime\": {\"type\": \"number\", \"title\": \"任务开始时间,例如：1450708950086\"}, \"contactTelephone\": {\"type\": \"string\", \"title\": \"联系人电话\"}, \"timeDescription\": {\"type\": \"string\", \"title\": \"工作时间描述\"}, \"paymentType\": {\"type\": \"string\", \"title\": \"支付类型 0：线上支付，1：线下支付\"}, \"addressList\": {\"items\": {\"properties\": {\"latitude\": {\"type\": \"string\", \"title\": \"纬度\"}, \"cityName\": {\"type\": \"string\", \"title\": \"城市名称\"}, \"areaName\": {\"type\": \"string\", \"title\": \"区域名称\"}, \"longitude\": {\"type\": \"string\", \"title\": \"经度\"}, \"address\": {\"type\": \"string\", \"title\": \"t工作地点\"}}, \"type\": \"object\", \"description\": \"任务地址\"}, \"type\": \"array\", \"title\": \"地址列表\"}, \"balanceUnit\": {\"type\": \"string\", \"title\": \"兼职金额单位；例如：元/小时，元/天等\"}, \"contactName\": {\"type\": \"string\", \"title\": \"联系人姓名\"}, \"content\": {\"type\": \"string\", \"title\": \"工作内容\"}, \"balance\": {\"type\": \"number\", \"title\": \"兼职金额\"}, \"headcount\": {\"type\": \"integer\", \"title\": \"招聘人数\"}, \"typeDesc\": {\"type\": \"string\", \"title\": \"任务类型描述: 只有在任务类型为其他时有效\"}, \"type\": {\"type\": \"string\", \"title\": \"任务类型；例如：传单派发，服务员等\"}, \"balanceType\": {\"type\": \"integer\", \"title\": \"结算类型；例如：完工结，日结等\"}}}");
       JsonUtil.getAllKey(jsonObject);

}
}