Convert special characters from cookies

The values in the cookie stored on the page contain special characters, but the passed values contain some special characters such as ":", which cannot be directly carried by special characters. Therefore, when storing cookies, convert it to unicode encoding:

Document. cookie = Key + "=" + escape (value); however, if it is obtained directly in the action, the Unicode encoding of special characters cannot be converted to the desired one. Search the relevant information online, find the Unicode Conversion Tool class written in Java. The escape in the project is the tool class, and the string code = escape is used in the action. unescape (Cookies [I]. getvalue ());

After the method is converted, Unicode can be converted to the special character I want.

The source code of escape. Java is as follows:

Public class escape
{
Private Final Static string [] hex = {"00", "01", "02", "03", "04", "05 ",
"06", "07", "08", "09", "0a", "0b", "0C", "0d", "0e", "0f ", "10 ",
"11", "12", "13", "14", "15", "16", "17", "18", "19", "1A ", "1B ",
"1C", "1D", "1E", "1f", "20", "21", "22", "23", "24", "25 ", "26 ",
"27", "28", "29", "2a", "2B", "2C", "2D", "2e", "2f", "30 ", "31 ",
"32", "33", "34", "35", "36", "37", "38", "39", "3A", "3B ", "3C ",
"3D", "3e", "3f", "40", "41", "42", "43", "44", "45", "46 ", "47 ",
"48", "49", "4A", "4B", "4C", "4D", "4E", "4f", "50", "51 ", "52 ",
"53", "54", "55", "56", "57", "58", "59", "5A", "5B", "5c ", "5d ",
"5E", "5f", "60", "61", "62", "63", "64", "65", "66", "67 ", "68 ",
"69", "6a", "6B", "6C", "6D", "6e", "6f", "70", "71", "72 ", "73 ",
"74", "75", "76", "77", "78", "79", "7A", "7b", "7C", "7D ", "7E ",
"7f", "80", "81", "82", "83", "84", "85", "86", "87", "88 ", "89 ",
"8a", "8b", "8C", "8d", "8e", "8f", "90", "91", "92", "93 ", "94 ",
"95", "96", "97", "98", "99", "9A", "9B", "9C", "9d", "9e ", "9f ",
"A0", "A1", "A2", "A3", "A4", "A5", "A6", "A7", "A8", "A9 ", "AA ",
"AB", "AC", "ad", "AE", "af", "B0", "B1", "B2", "B3", "B4 ", "B5 ",
"B6", "B7", "B8", "B9", "ba", "BB", "BC", "BD", "be", "BF ", "C0 ",
"C1", "C2", "C3", "C4", "C5", "C6", "C7", "C8", "C9", "ca ", "CB ",
"Cc", "cd", "CE", "CF", "D0", "d1", "D2", "D3", "D4", "D5 ", "D6 ",
"D7", "D8", "D9", "da", "DB", "DC", "DD", "de", "DF", "E0 ", "E1 ",
"E2", "E3", "E4", "E5", "E6", "E7", "E8", "E9", "EA", "Eb ", "EC ",
"Ed", "ee", "Ef", "F0", "f1", "F2", "F3", "F4", "F5", "F6 ", "F7 ",
"F8", "F9", "Fa", "FB", "FC", "FD", "Fe", "FF "};

Private Final Static byte [] val = {0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f,
0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f,
0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f,
0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f,
0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x00, 0x01,
0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x3f, 0x3f, 0x3f,
0x3f, 0x3f, 0x3f, 0x3f, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f, 0x3f,
0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f,
0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f,
0x3f, 0x3f, 0x3f, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f, 0x3f, 0x3f,
0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f,
0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f,
0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f,
0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f,
0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f,
0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f,
0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f,
0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f,
0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f,
0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f,
0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f,
0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f,
0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f,
0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f };

/**
* <P> discription: [Add code] </P>
* @ Param s
* @ Return
* @ Author: [XU Di]
* @ Update: [date YYYY-MM-DD] [modifier name] [Change description]
*/
Public static string escape (string S)
{
Stringbuffer sbuf = new stringbuffer ();
Int Len = S. Length ();
For (INT I = 0; I <Len; I ++)
{
Int CH = S. charat (I );
If (CH = '')
{// Space: map to '+'
Sbuf. append ('+ ');
}
Else if ('A' <= CH & Ch <= 'Z ')
{// 'A' .. 'Z': as it was
Sbuf. append (char) CH );
}
Else if ('A' <= CH & Ch <= 'Z ')
{// 'A' .. 'Z': as it was
Sbuf. append (char) CH );
}
Else if ('0' <= CH & Ch <= '9 ')
{// '0' .. '9': as it was
Sbuf. append (char) CH );
}
Else if (CH = '-' | CH = '_' // unreserved: as it was
| CH = '.' | CH = '! '| CH = '~ '| CH = '*'
| CH = '/''| CH =' ('| CH = ')')
{
Sbuf. append (char) CH );
}
Else if (CH <= 0x007f)
{// Other ASCII: map to % xx
Sbuf. append ('% ');
Sbuf. append (hex [CH]);
}
Else
{// UNICODE: map to % uxxxx
Sbuf. append ('% ');
Sbuf. append ('U ');
Sbuf. append (hex [(CH >>> 8)]);
Sbuf. append (hex [(0x00ff & Ch)]);
}
}
Return sbuf. tostring ();
}

/**
* <P> discription: [decoding] </P>
* @ Param s
* @ Return
* @ Author: [XU Di]
* @ Update: [date YYYY-MM-DD] [modifier name] [Change description]
*/
Public static string Unescape (string S)
{
Stringbuffer sbuf = new stringbuffer ();
Int I = 0;
Int Len = S. Length ();
While (I <Len)
{
Int CH = S. charat (I );
If (CH = '+ ')
{// +: Map''
Sbuf. append ('');
}
Else if ('A' <= CH & Ch <= 'Z ')
{// 'A' .. 'Z': as it was
Sbuf. append (char) CH );
}
Else if ('A' <= CH & Ch <= 'Z ')
{// 'A' .. 'Z': as it was
Sbuf. append (char) CH );
}
Else if ('0' <= CH & Ch <= '9 ')
{// '0' .. '9': as it was
Sbuf. append (char) CH );
}
Else if (CH = '-' | CH = '_' // unreserved: as it was
| CH = '.' | CH = '! '| CH = '~ '| CH = '*'
| CH = '/''| CH =' ('| CH = ')')
{
Sbuf. append (char) CH );
}
Else if (CH = '% ')
{
Int CINT = 0;
If ('U '! = S. charat (I + 1 ))
{// % XX: map to ASCII (XX)
CINT = (CINT <4) | escape. Val [S. charat (I + 1)];
CINT = (CINT <4) | escape. Val [S. charat (I + 2)];
I + = 2;
}
Else
{// % Uxxxx: map to Unicode (XXXX)
CINT = (CINT <4) | escape. Val [S. charat (I + 2)];
CINT = (CINT <4) | escape. Val [S. charat (I + 3)];
CINT = (CINT <4) | escape. Val [S. charat (I + 4)];
CINT = (CINT <4) | escape. Val [S. charat (I + 5)];
I + = 5;
}
Sbuf. append (char) CINT );
}
I ++;
}
Return sbuf. tostring ();
}

}