这是方法:
public List<LikeObject> startF(String token){
Facebook facebook = new FacebookTemplate(token);
FacebookProfile profile = facebook.userOperations().getUserProfile();
//System.out.println(facebook.isAuthorized());
System.out.println("Authenticcated user: "+profile.getFirstName()+" "+profile.getLastName());
PagedList<String> friendListIds = facebook.friendOperations().getFriendIds();
List<LikeObject> resultsLikes = facebook.fqlOperations().query("SELECT object_id, object_id_cursor,object_type, post_id, post_id_cursor, user_id "+
"FROM like "+
"WHERE user_id =me() ", new FqlResultMapper<LikeObject>(){
public LikeObject mapObject(FqlResult result) {
LikeObject like = new LikeObject();
like.object_id = result.getString("object_id");
like.object_id_cursor = result.getString("object_id_cursor");
like.object_type = result.getString("object_type");
like.post_id = result.getString("post_id");
like.post_id_cursor = result.getString("post_id_cursor");
like.user_id = result.getString("user_id");
return like;
}
});
return resultsLikes;
}
结果如下:
LikeObject [object_id = 578416 ..,object_id_cursor = null, object_type = status,post_id =,post_id_cursor = null,user_id = 10217 ..]
然后我想解析like.object_id并将其转换为java对象。但是我不知道如何使用spring social facebook来做到这一点。
我试过facebook.fetchObject(like.object_id, PostType.STATUS)
。但这似乎是一种错误的方式。
有没有办法解析spring社交中的“object_id”而不解析GET查询的原始JSON响应?
我试过这个:
LinkPost post = facebook.fetchObject(obj_id, LinkPost.class);
我相信obj_id有类型链接,我已经检查了
并导致以下异常:
Exception in thread "main" org.springframework.http.converter.HttpMessageNotReadableException: Could not read JSON: Unexpected token (END_OBJECT), expected FIELD_NAME: missing property 'postType' that is to contain type id (for class org.springframework.social.facebook.api.LinkPost)
at [Source: java.io.ByteArrayInputStream@6ca79a6a; line: 1, column: 11114]; nested exception is com.fasterxml.jackson.databind.JsonMappingException: Unexpected token (END_OBJECT), expected FIELD_NAME: missing property 'postType' that is to contain type id (for class org.springframework.social.facebook.api.LinkPost)
at [Source: java.io.ByteArrayInputStream@6ca79a6a; line: 1, column: 11114]
at org.springframework.http.converter.json.MappingJackson2HttpMessageConverter.readJavaType(MappingJackson2HttpMessageConverter.java:171)
at org.springframework.http.converter.json.MappingJackson2HttpMessageConverter.read(MappingJackson2HttpMessageConverter.java:163)
at org.springframework.web.client.HttpMessageConverterExtractor.extractData(HttpMessageConverterExtractor.java:94)
at org.springframework.web.client.RestTemplate.doExecute(RestTemplate.java:491)
at org.springframework.web.client.RestTemplate.execute(RestTemplate.java:460)
at org.springframework.web.client.RestTemplate.getForObject(RestTemplate.java:228)
at org.springframework.social.facebook.api.impl.FacebookTemplate.fetchObject(FacebookTemplate.java:202)
at com.repost.facebook.FbConnection.getLikedPosts(FbConnection.java:58)
at com.repost.facebook.MainClass.main(MainClass.java:15)
答案 0 :(得分:2)
我仍然不清楚“解析”是什么意思。但是,无论如何,让我试着回答这个问题......
我认为您只是希望能够将对象作为Post(或LinkPost)对象获取......是吗?如果是这样,那么有一些特殊的魔法让我不得不在API中加入,以便能够将帖子类型和多态反序列化转换为特定类型的Post(例如,LinkPost,StatusPost,等等)。
您可以在https://github.com/SpringSource/spring-social-facebook/blob/master/spring-social-facebook/src/main/java/org/springframework/social/facebook/api/impl/FeedTemplate.java中看到设置。在deserializePost()方法中,您会看到我读取了“type”属性并将其复制到新的“postType”字段中。其中一个字段用于填充Post的type属性,另一个用于确定应创建Post的哪个特定子类。解决我与杰克逊1.9.x之间的问题是一个黑客攻击......我认为杰克逊2会让那个黑客变得不必要,但我还没有尝试过。
因此,我只看到一种实用的方法:不要自己做所有的工作。而是使用facebook.feedOperations()。getPost(objectId)。它知道如何在封面下做魔术给你一个Post对象。从那里,如果您知道Post的特定类型,您可以将其转换为(如果)LinkPost,StatusPost等。
我看到的唯一其他选项是进入更低级别并通过facebook.restOperations()发出请求并自行处理绑定。显然,你的工作要多得多。