使用Jackson自定义JSON反序列化

您可以为此类编写自定义解串器。它可能看起来像这样：

class FlickrAccountJsonDeserializer extends JsonDeserializer<FlickrAccount> {    @Override    public FlickrAccount deserialize(JsonParser jp, DeserializationContext ctxt) throws IOException, JsonProcessingException {        Root root = jp.readValueAs(Root.class);        FlickrAccount account = new FlickrAccount();        if (root != null && root.user != null) { account.setId(root.user.id); if (root.user.username != null) {     account.setUsername(root.user.username.content); }        }        return account;    }    private static class Root {        public User user;        public String stat;    }    private static class User {        public String id;        public UserName username;    }    private static class UserName {        @JsonProperty("_content")        public String content;    }}

之后，您必须为您的类定义一个反序列化器。您可以按照以下步骤进行操作：

@JsonDeserialize(using = FlickrAccountJsonDeserializer.class)class FlickrAccount {    ...}