我正在尝试从Facebook获取查询响应并将其映射到用户定义的类:
我有以下课程:
class FBStory {
@Field
private String application_id;
@Field
private String application_name;
@Field
private String caption;
@Field
private String created_time;
@Field
private String description;
@Field
private String from;// user_Id
@Field
private String message;
@Field
private String name;
@Field("objectId")
private String object_id;
@Field
private String privacy;
@Field("statusType")
private String status_type;
@Field
private String story;
@Field("storyId")
private String id;
@Field("storyUrl")
private String link;
@Field
private String type;
@Field
private String updated_time;
@Field
private Set<CommentInfo> comments = new HashSet<CommentInfo>();//set of comment Id
@Field
private Set<String> likes = new HashSet<String>();
@Field("storyTags")
private Set<String> story_tags = new HashSet<String>();
}
查询的Facebook回复是:
Post[actions=[] application=null attribution=null caption=null comments=Comments[count=0 data=[]] createdTime=Mon Apr 01 08:16:28 IST 2013 description=null from=CategorizedFacebookType[category=null id=100000363414872 metadata=null name=Nitin Thokare type=null] icon=null id=100000363414872_555878751100900 likes=null likesCount=null link=null message=null messageTags={} metadata=null name=null objectId=null picture=null place=null privacy=Privacy[deny=null description=null friends=null networks=null value=] properties=[] source=null to=[] type=status updatedTime=Mon Apr 01 08:16:28 IST 2013 withTags=[]]
我试图使用以下方法将上述响应转换为上述类的对象:
storyObj = gson.fromJson(restFBResponse.toString(), SolrFBStoryDoc.class);
但是对于gson.fromJson()
,第一个参数应该是JSON
格式的字符串。因此,上面的代码行出现错误:
com.google.gson.JsonSyntaxException: java.lang.IllegalStateException: Expected BEGIN_OBJECT but was STRING at line 1 column 5
有什么方法可以将restFBResponse
转换为正确的Json
字符串,然后作为第一个参数传递给gson.fromJson()
?
答案 0 :(得分:0)
我发现使用Solr Beans是可能的,但使用Solr bean会引起它自身的问题,其中之一就是here所讨论的。因此,为了克服这一点,我收到了来自Facebook的JsonObject.class
格式(即connectionType)而不是Post.class
的回复,如下所示:
data = facebookClient.fetchConnection(connection, t, parameters)
where, 'fetchConnection' is defined as,
<T> Connection<T> fetchConnection(String connection, Class<T> connectionType, Parameter... parameters);