把UTF-8编码转换为GB2312编码[转]

把UTF-8编码转换为GB2312编码[转]


如果只有某个页的编码需要修改，ASP.net 中则可以简单的使用下面代码：

Encoding gb2312 = Encoding.GetEncoding("gb2312");


Response.ContentEncoding = gb2312;

在非ASP.net 应用中，可能你读到的数据是UTF-8编码，但是你要转换为GB2312编码，则可以参考以下代码：

string utfinfo = "document.write(/"alert('aa你好么？？');/");";


string gb2312info = string.Empty;




Encoding utf8 = Encoding.UTF8;


Encoding gb2312 = Encoding.GetEncoding("gb2312");




// Convert the string into a byte[].

byte[] unicodeBytes = utf8.GetBytes(utfinfo);


// Perform the conversion from one encoding to the other.

byte[] asciiBytes = Encoding.Convert(utf8, gb2312, unicodeBytes);




// Convert the new byte[] into a char[] and then into a string.


// This is a slightly different approach to converting to illustrate


// the use of GetCharCount/GetChars.

char[] asciiChars = new char[gb2312.GetCharCount(asciiBytes, 0, asciiBytes.Length)];


gb2312.GetChars(asciiBytes, 0, asciiBytes.Length, asciiChars, 0);


gb2312info = new string(asciiChars);

当然，其他各种编码之间的转换，跟上述代码也类似的，就不描述了。