delphi 判断字符串是否包含汉字，正则版与非正则版实现

//正则版 uses RegularExpressions; //相关单元 function IsChineseStr(s: String): Boolean; const pattern ='[\x{4E00}-\x{9FA5}]'; //测试用的表达式 begin Result:=false; if TRegEx.IsMatch(s, pattern) then begin Result:=True; end; end; //非正则版 function isChina(S: string): Boolean; var pStr: PWideChar; begin Result := false; pStr := PChar(S); while pStr^ <> #0 do begin case pStr^ of Char($4E00)..Char($9FCB): begin Result := True; Break; end; end; Inc(pStr); end; end;

function IsChina(S: string): Boolean; var pStr: PWideChar; function HexToInt(const HexValue: string): Integer; begin Val('$' + HexValue, Result, Result); end; function InChar(AChar: Char; AStart, AEnd: string): Boolean; begin Result := (Ord(AChar) >= HexToInt(AStart)) and (Ord(AChar) <= HexToInt(AEnd)) end; begin Result := false; pStr := PWideChar(S); while pStr^ <> #0 do begin if InChar(pStr^, '4E00', '9FA5')  // or InChar(pStr^, '9FA6', '9FEF')    //基本汉字补充74字 or InChar(pStr^, '3400', '4DB5')    //扩展A or InChar(pStr^, '20000', '2A6D6')  //扩展B42711字 or InChar(pStr^, '2A700', '2B734')  //扩展C4149字 or InChar(pStr^, '2B740', '2B81D')  //扩展D222字2B740-2B81D or InChar(pStr^, '2B820', '2CEA1')  //PUA(GBK)部件81字E815-E86F or InChar(pStr^, 'E815', 'E86F')    //扩展E5762字2B820-2CEA1 or InChar(pStr^, '2CEB0', '2EBE0')   //扩展F7473字2CEB0-2EBE0 or InChar(pStr^, '30000', '3134A')   //扩展G4939字30000-3134A or InChar(pStr^, '2F00', '2FD5')     //康熙部首214字2F00-2FD5 or InChar(pStr^, '2E80', '2EF3')     //部首扩展115字2E80-2EF3 or InChar(pStr^, 'F900', 'FAD9')     //兼容汉字477字F900-FAD9 or InChar(pStr^, '2F800', '2FA1D')  //兼容扩展542字2F800-2FA1D or InChar(pStr^, 'E400', 'E5E8')   //部件扩展452字E400-E5E8 or InChar(pStr^, 'E600', 'E6CF')   //PUA增补207字E600-E6CF or InChar(pStr^, '31C0', '31E3')   //汉字笔画36字31C0-31E3 or InChar(pStr^, '2FF0', '2FFB')   //汉字结构12字2FF0-2FFB or InChar(pStr^, '3105', '312F')   //汉语注音43字3105-312F or InChar(pStr^, '31A0', '31BA')   //注音扩展22字31A0-31BA or InChar(pStr^, '3007', '3007')   //?1字3007 then begin Result := True; Break; end; Inc(pStr); end; end;