因为工作需要，经常要从复杂的json里面取值，每次要做写一堆JSONObject，然后我就写了一个小工具（刚毕业，写的很菜）。
工具代码用了hutool的格式转换（Convert）、正则工具（ReUtil）和JSON工具
import cn.hutool.core.convert.Convert;
import cn.hutool.core.util.ReUtil;
import cn.hutool.json.*;
import org.junit.Test;
import java.util.ArrayDeque;
import java.util.Arrays;
import java.util.List;
import java.util.Queue;
public class JSONValuesUtil {
private static String getValue(Queue queue, String jsonStr) {
//如果队列为空就直接返回null
if (queue.size() == 0) {
return null;
}
JSONTokener jsonTokener = new JSONTokener(jsonStr,JSONConfig.create());
Object json = jsonTokener.nextValue();
//获取头部属性
String poll = queue.poll();
// 判断json类型
if (json instanceof JSONArray) {
JSONArray jsonArray = (JSONArray) json;
List all = ReUtil.findAll("\[(\d+)\]", poll, 1);
if (all.size() > 0) {
//如果是数组
String index = all.get(0);
// 判断当前队列是否有值 有就递归没有就返回jsonString
String str = jsonArray.getStr(Convert.toInt(index));
if (queue.peek() != null) {
return getValue(queue, str);
} else {
return str;
}
}
return null;
} else {
JSONObject jsonObject = (JSONObject) json;
List all = ReUtil.findAll("\[(\d+)\]", poll, 1);
if (all.size() > 0) {
//如果是数组
String index = all.get(0);
// 去除数组字段 （【0】）
poll = poll.substring(0, poll.length() - index.length() - 2);
// 判断当前队列是否有值 有就递归没有就返回jsonString
if (queue.peek() != null) {
return getValue(queue,jsonObject.getJSONArray(poll).getStr(Convert.toInt(index)));
} else {
return jsonObject.getJSONArray(poll).getStr(Convert.toInt(index));
}
} else {
// 如果是JSONObject
// 判断当前队列是否有值 有就递归没有就返回jsonString
if (queue.peek() != null) {
return getValue(queue,jsonObject.getStr(poll));
} else {
return jsonObject.getStr(poll);
}
}
}
}
public static String format(String json, String formatStr) {
String[] attributes = formatStr.split("\.");
if (attributes.length == 0) {
return null;
}
// 把数组转成队列（方便操作）
Queue queue = new ArrayDeque<>(Arrays.asList(attributes));
return getValue(queue, json);
}
@Test
public void test() {
String json = "{"IsDeleteEntry":"true","IsVerifybaseDataField":"false","IsEntryBatchFill":"true","ValidateFlag":"true","NumberSearch":"true","IsAutoSubmitAndAudit":"false","Model":{"FAccountBookID":{"FNumber":"101"},"FBUSDATE":"2021-06-30","FDate":"2021-06-30","FVOUCHERGROUPID":{"FNumber":"PZZ5"},"FYEAR":2021,"FdocumentStatus":"Z","FISADJUSTVOUCHER":false,"FPERIOD":6,"FEntity":[{"FEXPLANATION":"石家庄区域2021年6月各校区转入人数","FACCOUNTID":{"FNumber":"607.02.02"},"FDetailID":{"FDETAILID__FFLEX5":{"FNumber":"04.01.008"},"FDETAILID__FF100005":{"FNumber":"0007"},"FDETAILID__FFLEX7":{"FNumber":"SJ.00149"}},"FCURRENCYID":{"FNumber":"PRE001"},"FEXCHANGERATETYPE":{"FNumber":"HLTX01_SYS"},"FAMOUNTFOR":2,"FDEBIT":2},{"FEXPLANATION":"石家庄区域2021年6月各校区转入人数","FACCOUNTID":{"FNumber":"607.02.02"},"FDetailID":{"FDETAILID__FFLEX5":{"FNumber":"04.01.008"},"FDETAILID__FF100005":{"FNumber":"0001"},"FDETAILID__FFLEX7":{"FNumber":"SJ01067"}},"FCURRENCYID":{"FNumber":"PRE001"},"FEXCHANGERATETYPE":{"FNumber":"HLTX01_SYS"},"FAMOUNTFOR":1,"FDEBIT":1},{"FEXPLANATION":"石家庄区域2021年6月各校区转入人数","FACCOUNTID":{"FNumber":"607.02.02"},"FDetailID":{"FDETAILID__FFLEX5":{"FNumber":"04.01.008"},"FDETAILID__FF100005":{"FNumber":"0001"},"FDETAILID__FFLEX7":{"FNumber":"SJ01071"}},"FCURRENCYID":{"FNumber":"PRE001"},"FEXCHANGERATETYPE":{"FNumber":"HLTX01_SYS"},"FAMOUNTFOR":2,"FDEBIT":2},{"FEXPLANATION":"石家庄区域2021年6月各校区转入人数","FACCOUNTID":{"FNumber":"607.02.02"},"FDetailID":{"FDETAILID__FFLEX5":{"FNumber":"04.01.008"},"FDETAILID__FF100005":{"FNumber":"0005"},"FDETAILID__FFLEX7":{"FNumber":"SJ01113"}},"FCURRENCYID":{"FNumber":"PRE001"},"FEXCHANGERATETYPE":{"FNumber":"HLTX01_SYS"},"FAMOUNTFOR":1,"FDEBIT":1},{"FEXPLANATION":"石家庄区域2021年6月各校区转入人数","FACCOUNTID":{"FNumber":"607.02.02"},"FDetailID":{"FDETAILID__FFLEX5":{"FNumber":"04.01.008"},"FDETAILID__FF100005":{"FNumber":"0009"},"FDETAILID__FFLEX7":{"FNumber":"SY.00081"}},"FCURRENCYID":{"FNumber":"PRE001"},"FEXCHANGERATETYPE":{"FNumber":"HLTX01_SYS"},"FAMOUNTFOR":5,"FDEBIT":5},{"FEXPLANATION":"石家庄区域2021年6月各校区转入人数","FACCOUNTID":{"FNumber":"7777"},"FCURRENCYID":{"FNumber":"PRE001"},"FEXCHANGERATETYPE":{"FNumber":"HLTX01_SYS"},"FAMOUNTFOR":11,"FCREDIT":11},{"FEXPLANATION":"石家庄区域2021年6月各校区转出人数","FACCOUNTID":{"FNumber":"607.03.02"},"FDetailID":{"FDETAILID__FFLEX5":{"FNumber":"04.01.008"},"FDETAILID__FF100005":{"FNumber":"0009"},"FDETAILID__FFLEX7":{"FNumber":"SJ.00015"}},"FCURRENCYID":{"FNumber":"PRE001"},"FEXCHANGERATETYPE":{"FNumber":"HLTX01_SYS"},"FAMOUNTFOR":5,"FDEBIT":5},{"FEXPLANATION":"石家庄区域2021年6月各校区转出人数","FACCOUNTID":{"FNumber":"607.03.02"},"FDetailID":{"FDETAILID__FFLEX5":{"FNumber":"04.01.008"},"FDETAILID__FF100005":{"FNumber":"0004"},"FDETAILID__FFLEX7":{"FNumber":"SJ.001017"}},"FCURRENCYID":{"FNumber":"PRE001"},"FEXCHANGERATETYPE":{"FNumber":"HLTX01_SYS"},"FAMOUNTFOR":1,"FDEBIT":1},{"FEXPLANATION":"石家庄区域2021年6月各校区转出人数","FACCOUNTID":{"FNumber":"607.03.02"},"FDetailID":{"FDETAILID__FFLEX5":{"FNumber":"04.01.008"},"FDETAILID__FF100005":{"FNumber":"0007"},"FDETAILID__FFLEX7":{"FNumber":"SJ.00149"}},"FCURRENCYID":{"FNumber":"PRE001"},"FEXCHANGERATETYPE":{"FNumber":"HLTX01_SYS"},"FAMOUNTFOR":2,"FDEBIT":2},{"FEXPLANATION":"石家庄区域2021年6月各校区转出人数","FACCOUNTID":{"FNumber":"607.03.02"},"FDetailID":{"FDETAILID__FFLEX5":{"FNumber":"04.01.008"},"FDETAILID__FF100005":{"FNumber":"0009"},"FDETAILID__FFLEX7":{"FNumber":"SJ01057"}},"FCURRENCYID":{"FNumber":"PRE001"},"FEXCHANGERATETYPE":{"FNumber":"HLTX01_SYS"},"FAMOUNTFOR":1,"FDEBIT":1},{"FEXPLANATION":"石家庄区域2021年6月各校区转出人数","FACCOUNTID":{"FNumber":"607.03.02"},"FDetailID":{"FDETAILID__FFLEX5":{"FNumber":"04.01.008"},"FDETAILID__FF100005":{"FNumber":"0009"},"FDETAILID__FFLEX7":{"FNumber":"SJ01058"}},"FCURRENCYID":{"FNumber":"PRE001"},"FEXCHANGERATETYPE":{"FNumber":"HLTX01_SYS"},"FAMOUNTFOR":2,"FDEBIT":2},{"FEXPLANATION":"石家庄区域2021年6月各校区转出人数","FACCOUNTID":{"FNumber":"607.03.02"},"FDetailID":{"FDETAILID__FFLEX5":{"FNumber":"04.01.008"},"FDETAILID__FF100005":{"FNumber":"0001"},"FDETAILID__FFLEX7":{"FNumber":"SJ01065"}},"FCURRENCYID":{"FNumber":"PRE001"},"FEXCHANGERATETYPE":{"FNumber":"HLTX01_SYS"},"FAMOUNTFOR":2,"FDEBIT":2},{"FEXPLANATION":"石家庄区域2021年6月各校区转出人数","FACCOUNTID":{"FNumber":"607.03.02"},"FDetailID":{"FDETAILID__FFLEX5":{"FNumber":"04.01.008"},"FDETAILID__FF100005":{"FNumber":"0001"},"FDETAILID__FFLEX7":{"FNumber":"SJ01071"}},"FCURRENCYID":{"FNumber":"PRE001"},"FEXCHANGERATETYPE":{"FNumber":"HLTX01_SYS"},"FAMOUNTFOR":2,"FDEBIT":2},{"FEXPLANATION":"石家庄区域2021年6月各校区转出人数","FACCOUNTID":{"FNumber":"607.03.02"},"FDetailID":{"FDETAILID__FFLEX5":{"FNumber":"04.01.008"},"FDETAILID__FF100005":{"FNumber":"0005"},"FDETAILID__FFLEX7":{"FNumber":"SJ01088"}},"FCURRENCYID":{"FNumber":"PRE001"},"FEXCHANGERATETYPE":{"FNumber":"HLTX01_SYS"},"FAMOUNTFOR":1,"FDEBIT":1},{"FEXPLANATION":"石家庄区域2021年6月各校区转出人数","FACCOUNTID":{"FNumber":"607.03.02"},"FDetailID":{"FDETAILID__FFLEX5":{"FNumber":"04.01.008"},"FDETAILID__FF100005":{"FNumber":"0001"},"FDETAILID__FFLEX7":{"FNumber":"SJ01103"}},"FCURRENCYID":{"FNumber":"PRE001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