Java JSON处理

Question

我很难用Java处理下面的JSON，这是从外部Ansible剧本返回的：{"Sample":    {        "tag_description":"abc","tag_category_id":"def","tag_id":"ghi"    },    "Sample1":    {        "tag_description":"jkl","tag_category_id":"mno","tag_id":"pqr"    } }我已经能够使用自定义反序列化器成功解析JSON的一个部分，尽管它仅能获得第一部分。任何想法都将受到高度赞赏。@JsonComponentpublic class TagSerializer extends JsonDeserializer<Tag> {@Overridepublic Tag deserialize(JsonParser jsonParser,                        DeserializationContext deserializationContext) throws IOException,        JsonProcessingException {    ObjectMapper mapper = new ObjectMapper();    JsonFactory factory = mapper.getFactory();    JsonNode treeNode = jsonParser.getCodec().readTree(jsonParser);    Iterator<Map.Entry<String, JsonNode>> fields = treeNode.fields();    String name = "";    // collect the tag name    Map.Entry<String, JsonNode> entry = fields.next();    name = entry.getKey();    // now that we have the tag name, parse it as a separate JSON object    JsonNode node = entry.getValue();    // get the values from the JSON    String description = node.get("tag_description").asText();    String category_id = node.get("tag_category_id").asText();    String tag_id = node.get("tag_id").asText();     return new Tag(name, category_id, description, tag_id);}}我从Spring Boot REST API端点调用该方法，而我的“标签”模型是Spring实体

Answer 1

如果您使用的是Spring MVC，请在引用时考虑明确声明所需的类型，@RequestBody然后让框架为您完成工作

@PostMapping(value="/store", consumes = APPLICATION_JSON_VALUE)

public void tagJson(@RequestBody Map<String, Tag> json) {

  // Do not mess with ObjectMapper here, Spring will do the thing for you

}