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我試圖獲得來自Facebook查詢響應,並將其映射到用戶定義的類:如何將Facebook響應轉換爲json格式的字符串?
我有以下類:
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>();
}
而對於查詢Facebook的迴應是:
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=[]]
我試圖將上述響應轉換爲使用以上類別的對象:
storyObj = gson.fromJson(restFBResponse.toString(), SolrFBStoryDoc.class);
但對於gson.fromJson()
,第一個參數應該是格式爲JSON
的字符串。因此,我得到的代碼上面的行錯誤:
com.google.gson.JsonSyntaxException: java.lang.IllegalStateException: Expected BEGIN_OBJECT but was STRING at line 1 column 5
有沒有什麼辦法讓我可以轉換restFBResponse
到一個適當Json
字符串,然後傳遞作爲第一個參數gson.fromJson()
?