由于各种原因,我需要在android studio中用java反序列化来自寓言F#的json对象。字符串如下:
{"MainForm":{"OriginMerd":{"id":"onMggagerd","number":5,"tests":{"Blod":{"blodid":"1","glucose":52}}}}}
代码:
Stream<Map.Entry<String, String>> flatten(Map<String, Object> map)
{
return map.entrySet()
.stream()
.flatMap(this::extractValue);
}
Stream<Map.Entry<String, String>> extractValue(Map.Entry<String, Object> entry) {
if (entry.getValue() instanceof String) {
return Stream.of(new AbstractMap.SimpleEntry(entry.getKey(), (String) entry.getValue()));
} else if (entry.getValue() instanceof Map) {
return flatten((Map<String, Object>) entry.getValue());
}
return null;
}
@ReactMethod
public void testFunc(String jsonString, Callback cb){
Map<String,Object> map = new HashMap<>();
ObjectMapper mapper = new ObjectMapper();
try {
//convert JSON string to Map
map = mapper.readValue(String.valueOf(jsonString), new TypeReference<Map<String, Object>>() {
});
Map<String, String> flattenedMap = flatten(map)
.collect(Collectors.toMap(Map.Entry::getKey, Map.Entry::getValue));
for (Map.Entry<String, String> entry : flattenedMap.entrySet()) {
Log.e("flatmap",entry.getKey() + "/" + entry.getValue());
//System.out.println(entry.getKey() + "/" + entry.getValue());
}
} catch (JsonParseException e) {
e.printStackTrace();
} catch (JsonMappingException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
Log.e("JSONSTRING", jsonString);
cb.invoke("OK");
}
首先,我想我应该用对象映射器将其映射成一张地图,我使用对象映射器来获得一张地图,然后我遵循这种方法How to Flatten a HashMap?
然而,这样做的问题是,结果只给了我orginMerd id和blodid,而不是数字或葡萄糖字段。有没有一种优雅的方法来实现这一点呢?不幸的是,我不太精通Java。
https://stackoverflow.com/questions/56761492
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