unit Unit1; interface uses Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms, Dialogs, StdCtrls; type TForm1 = class(TForm) Button1: TButton; Button2: TButton; Button3: TButton; Button4: TButton; procedure Button1Click(Sender: TObject); procedure Button2Click(Sender: TObject); procedure Button3Click(Sender: TObject); procedure Button4Click(Sender: TObject); end; var Form1: TForm1; implementation {$R *.dfm} //TStringBuilder.Replace 替换字符串 procedure TForm1.Button1Click(Sender: TObject); var sb: TStringBuilder; begin sb := TStringBuilder.Create; sb.Append('从 Delphi 2007 到 Delphi 2009'); sb.Replace('Delphi', 'CBuilder'); ShowMessage(sb.ToString); {从 CBuilder 2007 到 CBuilder 2009} sb.Free; end; //TStringBuilder.Replace 替换字符 procedure TForm1.Button2Click(Sender: TObject); var sb: TStringBuilder; begin sb := TStringBuilder.Create; sb.Append('从 Delphi 2007 到 Delphi 2009'); sb.Replace('0', '9'); ShowMessage(sb.ToString); {从 Delphi 2997 到 Delphi 2999} sb.Free; end; //TStringBuilder.Replace 在指定范围内替换字符 procedure TForm1.Button3Click(Sender: TObject); var sb: TStringBuilder; begin sb := TStringBuilder.Create; sb.Append('ABABABABABAB'); sb.Replace('A', '-', 4, 5); ShowMessage(sb.ToString); {ABAB-B-B-BAB} sb.Free; end; //TStringBuilder.Replace 在指定范围内替换字符串 procedure TForm1.Button4Click(Sender: TObject); var sb: TStringBuilder; begin sb := TStringBuilder.Create; sb.Append('ABC123ABC123ABC123'); sb.Replace('ABC', '-', 3, 12); ShowMessage(sb.ToString); {ABC123-123-123} sb.Free; end; end.