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windows开发环境下用VC++6.0 对unicode 、utf-8、 gb2312 三种编码格式之间的转换方法: #include <iostream>
#include <string>
#include <Windows.h>
using namespace std;
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void unicodeToUTF8(const wstring &src, string& result)
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int n = WideCharToMultiByte( CP_UTF8, 0, src.c_str(), -1, 0, 0, 0, 0 );
result.resize(n);
::WideCharToMultiByte( CP_UTF8, 0, src.c_str(), -1, (char*)result.c_str(), result.length(), 0, 0 );
}
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void unicodeToGB2312(const wstring& wstr , string& result)
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int n = WideCharToMultiByte( CP_ACP, 0, wstr.c_str(), -1, 0, 0, 0, 0 );
result.resize(n);
::WideCharToMultiByte(CP_ACP, 0, wstr.c_str(), -1, (char*)result.c_str(), n, 0, 0 );
}
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void utf8ToUnicode(const string& src, wstring& result)
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int n = MultiByteToWideChar( CP_UTF8, 0, src.c_str(), -1, NULL, 0 );
result.resize(n);
::MultiByteToWideChar( CP_UTF8, 0, src.c_str(), -1, (LPWSTR)result.c_str(), result.length());
}
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void gb2312ToUnicode(const string& src, wstring& result)
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int n = MultiByteToWideChar( CP_ACP, 0, src.c_str(), -1, NULL, 0 );
result.resize(n);
::MultiByteToWideChar( CP_ACP, 0, src.c_str(), -1, (LPWSTR)result.c_str(), result.length());
}
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void printByte(string str)
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int i=0;
for (i=0; i<str.length(); i++)
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printf("%X ",(unsigned char)str.at(i));
}
printf("\n");
}
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void wprintByte(wstring str)
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int i=0;
for (i=0; i<str.length()*sizeof(wchar_t); i++)
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printf("%X ",*((unsigned char*)str.c_str()+i));
}
printf("\n");
}
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int main()
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string strText = "AB汉字";
string strUTF8;
wstring wstrUnicode;
string strGB2312;
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gb2312ToUnicode(strText, wstrUnicode);
printf("Unicode=");
wprintByte(wstrUnicode);
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unicodeToUTF8(wstrUnicode, strUTF8);
printf("UTF-8 =");
printByte(strUTF8);
utf8ToUnicode(strUTF8,wstrUnicode);
printf("Unicode=");
wprintByte(wstrUnicode);
unicodeToGB2312(wstrUnicode,strGB2312);
printf("GB2312 =");
printByte(strGB2312);
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return 0;
}
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 这里用“AB汉字”这样一个字符串做测试,它的ASCII编码为为41 42 BA BA D7 D6 输出结果:
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