Delphi7中idhttp和superobject获取网页中文乱码解决办法

Delphi7及其以下版本的 VCL 只支持 Ansi,

所以在使用WideString 与 UTF8String (定义与 AnsiString 相同) 并没有办法正确的在 VCL 中显示

Delphi7自带的utf-8转换函数遇到其无法识别的字符串就返回空。

新建一个util_utf8.pas,然后引用这个转换函数可以解决这个bug

 

unit util_utf8;

  

interface

  

uses Windows;

  

type

  UTF8String = AnsiString;

  

  function AnsiToWide(const S: AnsiString): WideString;

  function WideToUTF8(const WS: WideString): UTF8String;

  function AnsiToUTF8(const S: AnsiString): UTF8String;

  function UTF8ToWide(const US: UTF8String): WideString;

  function WideToAnsi(const WS: WideString): AnsiString;

  function UTF8ToAnsi(const S: UTF8String): AnsiString;

  

implementation

  

function AnsiToWide(const S: AnsiString): WideString;

var

  len: integer;

  ws: WideString;

begin

  Result:='';

  if (Length(S) = 0) then

    exit;

  len:=MultiByteToWideChar(CP_ACP, 0, PChar(s), -1, nil, 0);

  SetLength(ws, len);

  MultiByteToWideChar(CP_ACP, 0, PChar(s), -1, PWideChar(ws), len);

  Result:=ws;

end;

  

function WideToUTF8(const WS: WideString): UTF8String;

var

  len: integer;

  us: UTF8String;

begin

  Result:='';

  if (Length(WS) = 0) then

    exit;

  len:=WideCharToMultiByte(CP_UTF8, 0, PWideChar(WS), -1, nil, 0, nil, nil);

  SetLength(us, len);

  WideCharToMultiByte(CP_UTF8, 0, PWideChar(WS), -1, PChar(us), len, nil, nil);

  Result:=us;

end;

  

function AnsiToUTF8(const S: AnsiString): UTF8String;

begin

  Result:=WideToUTF8(AnsiToWide(S));

end;

  

function UTF8ToWide(const US: UTF8String): WideString;

var

  len: integer;

  ws: WideString;

begin

  Result:='';

  if (Length(US) = 0) then

    exit;

  len:=MultiByteToWideChar(CP_UTF8, 0, PChar(US), -1, nil, 0);

  SetLength(ws, len);

  MultiByteToWideChar(CP_UTF8, 0, PChar(US), -1, PWideChar(ws), len);

  Result:=ws;

end;

  

function WideToAnsi(const WS: WideString): AnsiString;

var

  len: integer;

  s: AnsiString;

begin

  Result:='';

  if (Length(WS) = 0) then

    exit;

  len:=WideCharToMultiByte(CP_ACP, 0, PWideChar(WS), -1, nil, 0, nil, nil);

  SetLength(s, len);

  WideCharToMultiByte(CP_ACP, 0, PWideChar(WS), -1, PChar(s), len, nil, nil);

  Result:=s;

end;

  

function UTF8ToAnsi(const S: UTF8String): AnsiString;

begin

  Result:=WideToAnsi(UTF8ToWide(S));

end;

  

end.

//*************************//**************************

//以上是一个文件,保存后引用。

//*************************//**************************

uses superobject, util_utf8;

procedure TForm1.Timer1Timer(Sender: TObject);
var
  idHttp: TIdHTTP;
  get_back,tmp1,tmp2:string;
  jRet: ISuperObject;
  strm: TStringStream;
begin
   strm := TStringStream.Create('');
   try
      idHttp := TIdHTTP.Create(nil);
      IdHTTP1.Get(self.Edit1.Text, strm);
      get_back:=UTF8ToAnsi(strm.DataString);
      idHttp.Disconnect;
      idHttp.Free;
  finally
    strm.Free;
  end;
  jRet:=TSuperObject.Create(stObject);
  jRet := SO(copy(get_back,8,Length(get_back)-9));
  tmp1:= jRet.O['gszzl'].AsString();
  self.Label2.Caption :=jRet.O['name'].AsString()+':'+tmp1;
end;

 

 

你可能感兴趣的:(delphi,delphi)