将ES查询转换为按键和值对嵌套对象排序的问题转换为Java API (ES 6.2版)

SearchRequest searchRequest = new SearchRequest("index_name");
SearchSourceBuilder sourceBuilder = new SearchSourceBuilder();
sourceBuilder.query(QueryBuilders.matchAllQuery());
searchRequest.source(sourceBuilder);

SearchResponse searchResponse = client.search(searchRequest, RequestOptions.DEFAULT);
SearchHits hits = searchResponse.getHits();

List<Map<String, Object>> nestedObjects = new ArrayList<>();
for (SearchHit hit : hits) {
    Map<String, Object> sourceAsMap = hit.getSourceAsMap();
    Map<String, Object> nestedObject = new HashMap<>();
    for (Map.Entry<String, Object> entry : sourceAsMap.entrySet()) {
        String key = entry.getKey();
        Object value = entry.getValue();
        String[] keys = key.split("\\.");
        Map<String, Object> currentObject = nestedObject;
        for (int i = 0; i < keys.length - 1; i++) {
            if (!currentObject.containsKey(keys[i])) {
                currentObject.put(keys[i], new HashMap<>());
            }
            currentObject = (Map<String, Object>) currentObject.get(keys[i]);
        }
        currentObject.put(keys[keys.length - 1], value);
    }
    nestedObjects.add(nestedObject);
}

nestedObjects.sort(Comparator.comparing(obj -> (String) obj.get("key")));

List<Map<String, Object>> sortedKeyValuePairs = new ArrayList<>();
for (Map<String, Object> nestedObject : nestedObjects) {
    Map<String, Object> keyValuePairs = new HashMap<>();
    flattenNestedObject("", nestedObject, keyValuePairs);
    sortedKeyValuePairs.add(keyValuePairs);
}

private static void flattenNestedObject(String prefix, Map<String, Object> nestedObject, Map<String, Object> keyValuePairs) {
    for (Map.Entry<String, Object> entry : nestedObject.entrySet()) {
        String key = entry.getKey();
        Object value = entry.getValue();
        if (value instanceof Map) {
            flattenNestedObject(prefix + key + ".", (Map<String, Object>) value, keyValuePairs);
        } else {
            keyValuePairs.put(prefix + key, value);
        }
    }
}