delphi 天气预报

天气预报

  var
    astream : tmemorystream;
    sStream : TStringStream;
    jv : TJSONValue;
  begin
    astream := tmemorystream.Create;
    sStream := TStringStream.Create( '', tencoding.UTF8 );

    self.NetHTTPClient1.Get( 'http://www.weather.com.cn/adat/sk/101010100.html',
      astream );
    sStream.CopyFrom( astream, astream.Size );
    self.Caption := sStream.Size.ToString( );
    Memo1.Text := sStream.DataString;

    jv := TJSONObject.ParseJSONValue( Memo1.Text ) as TJSONValue;
    self.Caption := jv.GetValue( 'weatherinfo', '' );
    freeandnil( sStream );
    freeandnil( astream );
  end;

 {"weatherinfo":{"city":"北京","cityid":"101010100","temp":"9","WD":"西南风","WS":"2级","SD":"22%","WSE":"2","time":"10:35","isRadar":"1","Radar":"JC_RADAR_AZ9010_JB","njd":"暂无实况","qy":"1015"}}

    TJSONObject *jo = (TJSONObject*) TJSONObject::ParseJSONValue(this->Memo6->Text);
    jo = (TJSONObject*)jo->Get("weatherinfo")->JsonValue;


    Memo6->Lines->Add(((TJSONPair*) jo->Get("city"))->JsonValue->Value());
    Memo6->Lines->Add(((TJSONPair*) jo->Get("cityid"))->JsonValue->Value());
    Memo6->Lines->Add(((TJSONPair*) jo->Get("temp"))->JsonValue->Value());
    Memo6->Lines->Add(((TJSONPair*) jo->Get("WD"))->JsonValue->Value());
    Memo6->Lines->Add(((TJSONPair*) jo->Get("WS"))->JsonValue->Value());
    Memo6->Lines->Add(((TJSONPair*) jo->Get("SD"))->JsonValue->Value());
    Memo6->Lines->Add(((TJSONPair*) jo->Get("WSE"))->JsonValue->Value());
    Memo6->Lines->Add(((TJSONPair*) jo->Get("time"))->JsonValue->Value());
    Memo6->Lines->Add(((TJSONPair*) jo->Get("isRadar"))->JsonValue->Value());
    Memo6->Lines->Add(((TJSONPair*) jo->Get("Radar"))->JsonValue->Value());
    Memo6->Lines->Add(((TJSONPair*) jo->Get("njd"))->JsonValue->Value());
    Memo6->Lines->Add(((TJSONPair*) jo->Get("qy"))->JsonValue->Value());