Ajax Chinese parameter garbled Solution

Solution 1
======================
[Page parameter passing method:]
Example: "AAA. do? Val = "+ encodeuri (" value to be uploaded "))
[Parameter acquisition method:]
String val = request. getparameter ("Val ");
Val = java.net. urldecoder. Decode (Val, "UTF-8 ");

Solution 2
======================
[Page parameter passing method:]
Example: "AAA. do? Val = "+ escape (" value to be uploaded "))
[Parameter acquisition method:]
String val = request. getparameter ("Val ");
Val = escape. Unescape (VAL );

The implementation of escape 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 };

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 ('A' <= CH & Ch <= 'Z '){
Sbuf. append (char) CH );
} Else if ('A' <= CH & Ch <= 'Z '){
Sbuf. append (char) CH );
} Else if ('0' <= CH & Ch <= '9 '){
Sbuf. append (char) CH );
} Else if (CH = '-' | CH = '_' | CH = '.'
| CH = '! '| CH = '~ '| CH = '*'
| CH = '/''| CH =' ('| CH = ')'){
Sbuf. append (char) CH );
} Else if (CH <= 0x007f ){
Sbuf. append ('% ');
Sbuf. append (hex [CH]);
} Else {
Sbuf. append ('% ');
Sbuf. append ('U ');
Sbuf. append (hex [(CH >>> 8)]);
Sbuf. append (hex [(0x00ff & Ch)]);
}
}
Return sbuf. tostring ();
}
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) | Val [S. charat (I + 1)];
CINT = (CINT <4) | Val [S. charat (I + 2)];
I + = 2;
} Else {// % uxxxx: map to Unicode (XXXX)
CINT = (CINT <4) | Val [S. charat (I + 2)];
CINT = (CINT <4) | Val [S. charat (I + 3)];
CINT = (CINT <4) | Val [S. charat (I + 4)];
CINT = (CINT <4) | Val [S. charat (I + 5)];
I + = 5;
}
Sbuf. append (char) CINT );
}
I ++;
}
Return sbuf. tostring ();
}
}

Add the above implementation as a class to the project, and then call its Unescape method to complete decoding;

The first method is recommended for the above two solutions. The reason is very simple: it completes functions through JS functions and Java APIs, and does not involve third-party classes, more secure and reliable.