我没有得到任何直接的方法来使用 Spring Social 框架获取 Facebook 帖子的 full_picture。我使用 Facebook 的图形 API 来获得全貌。我添加的代码仅供参考。您需要根据需要进行自定义。
FacebookTemplate facebook = new FacebookTemplate("<fb token>");
String[] ALL_POST_FIELDS = { "id", "actions", "admin_creator", "application", "caption", "created_time", "description", "from", "icon",
"is_hidden", "is_published", "link", "message", "message_tags", "name", "object_id", "picture", "full_picture", "place", "privacy",
"properties", "source", "status_type", "story", "to", "type", "updated_time", "with_tags", "shares", "likes.limit(1).summary(true)" };
URIBuilder uriBuilder = URIBuilder.fromUri(facebook.getBaseGraphApiUrl() + request.getAccountId() + "/posts");
uriBuilder = uriBuilder.queryParam("limit", String.valueOf(request.getRecordCount()));
uriBuilder.queryParam("fields", org.springframework.util.StringUtils.arrayToCommaDelimitedString(ALL_POST_FIELDS));
URI uri = uriBuilder.build();
LOGGER.info("facebook URL :{} ", uri);
JsonNode jsonNode = (JsonNode) facebook.getRestTemplate().getForObject(uri, JsonNode.class);
LOGGER.debug("facebook URL :{}, response: {} ", uri, jsonNode);
// you can cast jsonnode as required into your format or below line can be used to cast into PagedList<Post> format
PagedList<Post> posts = new DeserializingPosts().deserializeList(jsonNode, null, Post.class, true);
然后将jsonNode 代码转换为您需要的格式。或者您也可以使用下面的DeserializingPosts 类将其转换为PagedList<Post>。
@Component
public class DeserializingPosts extends AbstractOAuth2ApiBinding {
private ObjectMapper objectMapper = new ObjectMapper();
private static final Logger LOGGER = Logger.getLogger(DeserializingPosts.class);
public <T> PagedList<T> deserializeList(JsonNode jsonNode, String postType, Class<T> type, boolean accountFlag) {
JsonNode dataNode = jsonNode.get("data");
return deserializeList(dataNode, postType, type);
}
public <T> PagedList<T> deserializeList(JsonNode jsonNode, String postType, Class<T> type) {
List posts = new ArrayList();
for (Iterator iterator = jsonNode.iterator(); iterator.hasNext();) {
posts.add(deserializePost(postType, type, (ObjectNode) iterator.next()));
}
if (jsonNode.has("paging")) {
JsonNode pagingNode = jsonNode.get("paging");
PagingParameters previousPage = PagedListUtils.getPagedListParameters(pagingNode, "previous");
PagingParameters nextPage = PagedListUtils.getPagedListParameters(pagingNode, "next");
return new PagedList(posts, previousPage, nextPage);
}
return new PagedList(posts, null, null);
}
public <T> T deserializePost(String postType, Class<T> type, ObjectNode node) {
try {
if (postType == null) {
postType = determinePostType(node);
}
node.put("postType", postType);
node.put("type", postType);
MappingJackson2HttpMessageConverter converter = super.getJsonMessageConverter();
this.objectMapper = new ObjectMapper();
this.objectMapper.registerModule(new FacebookModule());
converter.setObjectMapper(this.objectMapper);
return this.objectMapper.reader(type).readValue(node.toString());
} catch (IOException shouldntHappen) {
throw new UncategorizedApiException("facebook", "Error deserializing " + postType + " post" + shouldntHappen.getMessage(),
shouldntHappen);
}
}
private String determinePostType(ObjectNode node) {
if (node.has("type")) {
try {
String type = node.get("type").textValue();
Post.PostType.valueOf(type.toUpperCase());
return type;
} catch (IllegalArgumentException e) {
LOGGER.error("Error occured while determining post type: " + e.getMessage(), e);
return "post";
}
}
return "post";
}
}