//遞歸更新一個(gè)json對(duì)象，原對(duì)象若沒(méi)有則插入key,精妙！

@SuppressWarnings("unchecked")

Object setObjectRecursive(Object current,final Listpaths,int index, finalObject value) {//如果是已經(jīng)超出path，我們就返回value即可，作為最底層葉子節(jié)點(diǎn)

boolean isLastIndex = index ==paths.size();if(isLastIndex) {returnvalue;

}

String path=paths.get(index).trim();boolean isNeedMap =isPathMap(path);if(isNeedMap) {

Mapmapping;//當(dāng)前不是map，因此全部替換為map，并返回新建的map對(duì)象

boolean isCurrentMap = current instanceofMap;if (!isCurrentMap) {

mapping= new HashMap();

mapping.put(

path,

buildObject(paths.subList(index+ 1, paths.size()),

value));returnmapping;

}//當(dāng)前是map，但是沒(méi)有對(duì)應(yīng)的key，也就是我們需要新建對(duì)象插入該map，并返回該map

mapping = ((Map) current);boolean hasSameKey =mapping.containsKey(path);if (!hasSameKey) {

mapping.put(path,buildObject(paths.subList(index+ 1, paths.size()),

value));returnmapping;

}//當(dāng)前是map，而且還竟然存在這個(gè)值，好吧，繼續(xù)遞歸遍歷

current =mapping.get(path);

mapping.put(path, setObjectRecursive(current, paths, index+ 1, value));returnmapping;

}boolean isNeedList =isPathList(path);if(isNeedList) {

Listlists;int listIndexer =getIndex(path);//當(dāng)前是list，直接新建并返回即可

boolean isCurrentList = current instanceofList;if (!isCurrentList) {

lists= expand(new ArrayList(), listIndexer + 1);

lists.set(

listIndexer,

buildObject(paths.subList(index+ 1, paths.size()),

value));returnlists;

}//當(dāng)前是list，但是對(duì)應(yīng)的indexer是沒(méi)有具體的值，也就是我們新建對(duì)象然后插入到該list，并返回該List

lists = (List) current;

lists= expand(lists, listIndexer + 1);boolean hasSameIndex = lists.get(listIndexer) != null;if (!hasSameIndex) {

lists.set(

listIndexer,

buildObject(paths.subList(index+ 1, paths.size()),

value));returnlists;

}//當(dāng)前是list，并且存在對(duì)應(yīng)的index，沒(méi)有辦法繼續(xù)遞歸尋找

current =lists.get(listIndexer);

lists.set(listIndexer,

setObjectRecursive(current, paths, index+ 1, value));returnlists;

}throw DataMException.asDataMException("該異常代表系統(tǒng)編程錯(cuò)誤, 請(qǐng)聯(lián)系DataX開(kāi)發(fā)團(tuán)隊(duì)");

}//根據(jù)key的類型來(lái)選擇獲取value的方式

private boolean isPathMap(finalString path) {return StringUtils.isNotBlank(path) && !isPathList(path);

}private boolean isPathList(finalString path) {return path.contains("[") && path.contains("]");

}

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