bson(json）序列还原

bson(json）序列还原

unit Unit2;

interface

uses
  Grijjy.Bson.Serialization, Grijjy.Bson,
  Grijjy.Bson.IO, Winapi.Windows, Winapi.Messages, System.SysUtils,
  System.Variants, System.Classes, Vcl.Graphics, Vcl.Controls, Vcl.Forms,
  Vcl.Dialogs, Vcl.StdCtrls;

type
  TTest = record
    public
      id: Integer;
      name: TBytes;
    end;

  TForm2 = class(TForm)
    Button1: TButton;
    Button2: TButton;
    Memo1: TMemo;
    Button3: TButton;
    Button4: TButton;
    Button5: TButton;
    Button6: TButton;
    Button7: TButton;
    Button8: TButton;
    procedure Button1Click(Sender: TObject);
    procedure Button2Click(Sender: TObject);
    procedure Button3Click(Sender: TObject);
    procedure Button4Click(Sender: TObject);
    procedure Button5Click(Sender: TObject);
    procedure Button6Click(Sender: TObject);
    procedure Button7Click(Sender: TObject);
    procedure Button8Click(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  Form2: TForm2;

implementation

{$R *.dfm}

var
  Bson: TBytes;
  json: string;

procedure TForm2.Button1Click(Sender: TObject);
//bson write
begin
  var w: IgoBsonWriter := TgoBsonWriter.Create;
  w.WriteStartDocument;
  w.WriteInt32('int', 2);
  w.WriteString('str', '中国');
  w.WriteEndDocument;
  Bson := w.ToBson;
end;

procedure TForm2.Button2Click(Sender: TObject);
//bson read
begin
  Memo1.Clear;
  var r: IgoBsonReader := TgoBsonReader.Create(Bson);
  r.ReadStartDocument;
  Memo1.Lines.Add(r.ReadName);
  Memo1.Lines.Add(r.ReadInt32.ToString);
  Memo1.Lines.Add(r.ReadName);
  Memo1.Lines.Add(r.ReadString);
  r.ReadEndDocument;
end;

procedure TForm2.Button3Click(Sender: TObject);
//json write
begin
  var w: IgoJsonWriter := TgoJsonWriter.Create;
  w.WriteStartDocument;
  w.WriteInt32('int', 2);
  w.WriteString('str', '中国');
  w.WriteEndDocument;
  json := w.ToJson;
  Memo1.Text := json;  //{ "int" : 2, "str" : "\u4e2d\u56fd" }
end;

procedure TForm2.Button4Click(Sender: TObject);
//json read
begin
  Memo1.Clear;
  var r: IgoJsonReader := TgoJsonReader.Create(json);
  r.ReadStartDocument;
  Memo1.Lines.Add(r.ReadName);
  Memo1.Lines.Add(r.ReadInt32.ToString);
  Memo1.Lines.Add(r.ReadName);
  Memo1.Lines.Add(r.ReadString);
  r.ReadEndDocument;
end;

procedure TForm2.Button5Click(Sender: TObject);
//record序列为bson(json)
begin
  var rec: TTest;
  rec.id := 2;
  rec.name := BytesOf('中国');
  TgoBsonSerializer.Serialize(rec, Bson);        //bson
 // TgoBsonSerializer.Serialize(rec, json);      //json
end;

procedure TForm2.Button6Click(Sender: TObject);
//bson(json)还原为record
begin
  Memo1.Clear;
  var rec: TTest;
  TgoBsonSerializer.Deserialize(Bson, rec);   //bson
 // TgoBsonSerializer.Deserialize(json, rec); //json
  Memo1.Lines.Add(rec.id.ToString);
  Memo1.Lines.Add(StringOf(rec.name));
end;

procedure TForm2.Button7Click(Sender: TObject);
begin
  var w: TgoBsonDocument := TgoBsonDocument.Create;
  w.Add('int', 2);
  w.Add('str', '中国');
  w.Add('bytes', bytesof('汉字'));
  Bson := w.ToBson;    //bson
//  json := w.ToJson;  //json
end;

procedure TForm2.Button8Click(Sender: TObject);
begin
  Memo1.Clear;
  var r: TgoBsonDocument;
  r := r.Load(Bson);   //bson
//  r.TryParse(json, r); //json
  Memo1.Lines.Add(r.ValuesByName['int'].AsInteger.ToString);
  Memo1.Lines.Add(r.ValuesByName['str'].AsString);
  Memo1.Lines.Add(StringOf(r.ValuesByName['bytes'].AsByteArray));
end;

end.