json解析错误：-com-google-gson-JsonSyntaxException--java-lang-IllegalStateE

报错信息

com.google.gson.JsonSyntaxException: java.lang.IllegalStateException: Expected BEGIN_ARRAY but was BEGIN_OBJECT at line 1 column 2 path $

错误代码片段

  Gson gson=new Gson();
                //序列化
DiscussPost discussPost = gson.fromJson(response,DiscussPost.class);

原因：引入的数据格式不对，我这里是因为数据为空