本文整理自网络，侵删。
delphi压缩与解压，比较简单，也比较实用，对我来说已经足够，我只想让客户端下载一个压缩文件到本地后解压出来就行，看网上有用什么控件的，我的是delphi6没装那控件，在公司管的比较严，要装控件比较麻烦。不扯了，看代码吧。
unit unzip;
interface
uses
Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
Dialogs, StdCtrls;
type
TForm1 = class(TForm)
Button1: TButton;
Button2: TButton;
procedure Button1Click(Sender: TObject);
procedure Button2Click(Sender: TObject);
private
{ Private declarations }
public
{ Public declarations }
end;
var
Form1: TForm1;
implementation
{$R *.dfm}
uses Zlib;
//压缩函数
procedure Zip(var fs: TMemoryStream);
var
cs: TCompressionStream;
ms: TMemoryStream;
num: Integer;
begin
if not(Assigned(fs) and (fs.Size>0)) then Exit;
num := fs.Size;
ms := TMemoryStream.Create;
cs := TCompressionStream.Create(clMax, ms);
try
fs.SaveToStream(cs);
cs.Free;
//ms.Position := 0;
fs.Clear;
fs.WriteBuffer(num, sizeof(num));
fs.CopyFrom(ms, 0);
finally
ms.Free;
end;
end;
//解压函数
procedure UnZip2(var fs: Tmemorystream);
var
ds: TDecompressionStream;
ms: TMemoryStream;
num: Integer;
begin
if not(Assigned(fs) and (fs.Size>0)) then Exit;
fs.Position := 0;
fs.ReadBuffer(num,sizeof(num));
ms := TMemoryStream.Create;
ds := TDecompressionStream.Create(fs);
try
ms.SetSize(num);
ds.Read(ms.Memory^, num);
//ms.Position := 0;
fs.Clear;
fs.CopyFrom(ms, 0);
finally
ds.Free;
ms.Free;
end;
end;
//压缩测试
procedure TForm1.Button1Click(Sender: TObject);
var
ms: TMemoryStream;
begin
ms := TMemoryStream.Create;
ms.LoadFromFile('D:\delphi\szcb.mdb');
Zip(ms);
ms.SaveToFile('D:\delphi\szcb.zip');
end;
//解压测试
procedure TForm1.Button2Click(Sender: TObject);
var
ms: TMemoryStream;
begin
ms := TMemoryStream.Create;
ms.LoadFromFile('D:\delphi\szcb.zip');
UnZip2(ms);
ms.SaveToFile('D:\delphi\szcb2.mdb');
end;
end.
相关阅读 >>
Delphi 使用openjdk进行Delphi android开发
更多相关阅读请进入《Delphi》频道 >>
