Jackson-递归解析到Map
我试图简化我的代码:我想存储键和值(所有字符串)。
我实际上是使用A Map<String,
Object>来存储它。hat方法Object
可以是值(String
)或新节点(Map<String, Object>
)。
如何简化此代码?递归函数会很好。
try { JsonParser jsonParser = new JsonFactory().createJsonParser(content);
jsonParser.nextToken();
while (jsonParser.nextToken() != JsonToken.END_OBJECT) {
jsonParser.nextToken();
if (jsonParser.getCurrentToken() == JsonToken.START_OBJECT) {
while (jsonParser.nextToken() != JsonToken.END_OBJECT) {
String key = jsonParser.getCurrentName();
jsonParser.nextToken();
if (jsonParser.getCurrentToken() == JsonToken.START_OBJECT) {
mData.put(key, new HashMap<String, Object>());
while (jsonParser.nextToken() != JsonToken.END_OBJECT) {
String subkey = jsonParser.getCurrentName();
jsonParser.nextToken();
if (jsonParser.getCurrentToken() == JsonToken.START_OBJECT) {
Map<String, Object> subdata = (Map<String, Object>) mData.get(key);
subdata.put(subkey, new HashMap<String, Object>());
while (jsonParser.nextToken() != JsonToken.END_OBJECT) {
String subsubkey = jsonParser.getCurrentName();
jsonParser.nextToken();
Map<String, Object> subsubdata = (Map<String, Object>) subdata.get(subkey);
LogHelper.d("data[" + key + "][" + subkey + "][" + subsubkey + "]=" + jsonParser.getText());
subsubdata.put(subsubkey, jsonParser.getText());
}
}
else {
LogHelper.d("data[" + key + "]=" + jsonParser.getText());
mData.put(key, jsonParser.getText());
}
}
}
else {
LogHelper.d("data[" + key + "]=" + jsonParser.getText());
mData.put(key, jsonParser.getText());
}
}
}
else {
LogHelper.d("status=" + jsonParser.getText());
mStatus = jsonParser.getText();
}
}
}
catch (IllegalArgumentException e) {
error("0", "IllegalArgumentException: " + e.getMessage());
}
catch (JsonParseException e) {
error("0", "IOException: " + e.getMessage());
}
catch (IOException e) {
error("0", "IOException: " + e.getMessage());
}
回答:
假设您的最终目标只是将JSON反序列化为Map<String, Object>
,那么使用Jackson可以简单得多。使用ObjectMapper
:
final String json = "{}";final ObjectMapper mapper = new ObjectMapper();
final MapType type = mapper.getTypeFactory().constructMapType(
Map.class, String.class, Object.class);
final Map<String, Object> data = mapper.readValue(json, type);
您将需要错误处理等,但这是一个很好的起点。
以上是 Jackson-递归解析到Map 的全部内容, 来源链接: utcz.com/qa/419690.html