話不多說，前幾天我就遇到了字符之間的麻煩，在網頁中出現了亂碼，為此我還寫了個百度經驗，呵呵。
現在就是解決這個問題的時候了，當然用txt自帶的“另存為”就可以簡單的轉換，但是現在討論的是如何利用c++中的函數來改變的。
下面介紹一下WinAPI的兩個函數：WideCharToMultiByte、MultiByteToWideChar。
函數原型：
int WideCharToMultiByte(
UINT CodePage, // code page
DWORD dwFlags, // performance and mapping flags
LPCWSTR lpWideCharStr, // wide-character string
int cchWideChar, // number of chars in string
LPSTR lpMultiByteStr, // buffer for new string
int cbMultiByte, // size of buffer
LPCSTR lpDefaultChar, // default for unmappable chars
LPBOOL lpUsedDefaultChar // set when default char used
); //將寬字符轉換成多個窄字符
int MultiByteToWideChar(
UINT CodePage, // code page
DWORD dwFlags, // character-type options
LPCSTR lpMultiByteStr, // string to map
int cbMultiByte, // number of bytes in string
LPWSTR lpWideCharStr, // wide-character buffer
int cchWideChar // size of buffer
);//將多個窄字符轉換成寬字符
需要用到的一些函數：
CString CTest::HexToBin(CString string)//將16進制數轉換成2進制
{
if( string == "0") return "0000";
if( string == "1") return "0001";
if( string == "2") return "0010";
if( string == "3") return "0011";
if( string == "4") return "0100";
if( string == "5") return "0101";
if( string == "6") return "0110";
if( string == "7") return "0111";
if( string == "8") return "1000";
if( string == "9") return "1001";
if( string == "a") return "1010";
if( string == "b") return "1011";
if( string == "c") return "1100";
if( string == "d") return "1101";
if( string == "e") return "1110";
if( string == "f") return "1111";
return "";
}
CString CTest::BinToHex(CString BinString)//將2進制數轉換成16進制
{
if( BinString == "0000") return "0";
if( BinString == "0001") return "1";
if( BinString == "0010") return "2";
if( BinString == "0011") return "3";
if( BinString == "0100") return "4";
if( BinString == "0101") return "5";
if( BinString == "0110") return "6";
if( BinString == "0111") return "7";
if( BinString == "1000") return "8";
if( BinString == "1001") return "9";
if( BinString == "1010") return "a";
if( BinString == "1011") return "b";
if( BinString == "1100") return "c";
if( BinString == "1101") return "d";
if( BinString == "1110") return "e";
if( BinString == "1111") return "f";
return "";
}
int CTest::BinToInt(CString string)//2進制字符數據轉換成10進制整型
{
int len =0;
int tempInt = 0;
int strInt = 0;
for(int i =0 ;i < string.GetLength() ;i ++)
{
tempInt = 1;
strInt = (int)string.GetAt(i)-48;
for(int k =0 ;k < 7-i ; k++)
{
tempInt = 2*tempInt;
}
len += tempInt*strInt;
}
return len;
}
UTF-8轉換成GB2312先把UTF-8轉換成Unicode.然後再把Unicode通過函數WideCharToMultiByte轉換成GB2312
WCHAR* CTest::UTF_8ToUnicode(char *ustart) //把UTF-8轉換成Unicode
{
char char_one;
char char_two;
char char_three;
int Hchar;
int Lchar;
char uchar[2];
WCHAR *unicode;
CString string_one;
CString string_two;
CString string_three;
CString combiString;
char_one = *ustart;
char_two = *(ustart+1);
char_three = *(ustart+2);
string_one.Format("%x",char_one);
string_two.Format("%x",char_two);
string_three.Format("%x",char_three);
string_three = string_three.Right(2);
string_two = string_two.Right(2);
string_one = string_one.Right(2);
string_three = HexToBin(string_three.Left(1))+HexToBin(string_three.Right(1));
string_two = HexToBin(string_two.Left(1))+HexToBin(string_two.Right(1));
string_one = HexToBin(string_one.Left(1))+HexToBin(string_one.Right(1));
combiString = string_one +string_two +string_three;
combiString = combiString.Right(20);
combiString.Delete(4,2);
combiString.Delete(10,2);
Hchar = BinToInt(combiString.Left(8));
Lchar = BinToInt(combiString.Right(8));
uchar[1] = (char)Hchar;
uchar[0] = (char)Lchar;
unicode = (WCHAR *)uchar;
return unicode;
}
char * CTest::UnicodeToGB2312(unsigned short uData) //把Unicode 轉換成 GB2312
{
char *buffer ;
buffer = new char[sizeof(WCHAR)];
WideCharToMultiByte(CP_ACP,NULL,&uData,1,buffer,sizeof(WCHAR),NULL,NULL);
return buffer;
}
GB2312轉換成UTF-8：先把GB2312通過函數MultiByteToWideChar轉換成Unicode.然後再把Unicode通過拆開Unicode後拼裝成UTF-8。
作者“李木空間 ”
