我有一个HashMap对象，我想使用com.fasterxml.jackson.databind.ObjectMapper将其转换为JsonNode树.做这件事最好的方法是什么？
I found the following code but since I don't know the Jackson API well, I wonder if there are some better ways.
mapper.reader().readTree(mapper.writeValueAsString(hashmap))
以下操作将会起到作用:
JsonNode jsonNode = mapper.convertValue(map, JsonNode.class);
或者使用comments中指出的more elegant溶液:
JsonNode jsonNode = mapper.valueToTree(map);
If you need to write your jsonNode as a string, use:
String json = mapper.writerWithDefaultPrettyPrinter().writeValueAsString(jsonNode);