{
  "name": "张三", 
  "age": 33,
  "sex": true,
  "weight": 123.456,
  "tel": ["86-1111111", "86-2222222"],
  "addresses":{"address":"A省B市", 
"pc":"100001"},
  "children": [
    {
      "name": "张继",
      "age": "22",
      "sex": true
    },
    {
      "name": "张承",
      "age": "11",
      "sex": false
    }
  ]
}

uses JsonDataObjects;

procedure TForm1.Button1Click(Sender: TObject);
var
    jo: TJsonObject;
    i: Integer;
begin
    jo := TJsonObject.Parse( Memo1.Text) as TJsonObject;

    Memo2.Lines.Add(jo[‘name‘]);
    Memo2.Lines.Add(jo[‘age‘]);
    Memo2.Lines.Add(jo[‘sex‘]);
    Memo2.Lines.Add(jo[‘weight‘]);
    Memo2.Lines.Add(jo[‘tel‘].Items[0]);
    Memo2.Lines.Add(jo[‘tel‘].Items[1]);
    Memo2.Lines.Add(jo[‘addresses‘].S[‘address‘]);
    Memo2.Lines.Add(jo[‘addresses‘].S[‘pc‘]);
    Memo2.Lines.Add(‘总共数据数:‘ + inttostr(jo[‘children‘].Count));
    for i := 0 to jo[‘children‘].Count - 1 do
    begin
        Memo2.Lines.Add(jo[‘children‘].Items[i][‘name‘]);
        Memo2.Lines.Add(jo[‘children‘].Items[i][‘age‘]);
        Memo2.Lines.Add(jo[‘children‘].Items[i][‘sex‘]);
    end;
    jo.Free;

JsonDataObjects