Http发送Json请求

importcom.google.gson.JsonArray;importcom.google.gson.JsonObject;importorg.apache.http.HttpResponse;importorg.apache.http.HttpStatus;importorg.apache.http.client.HttpClient;importorg.apache.http.client.methods.HttpPost;importorg.apache.http.entity.StringEntity;importorg.apache.http.impl.client.DefaultHtt