Garbled Chinese parameters passed in the address bar using the escape transcode _ javascript Technique in js

Garbled text. For a big header, you can consider not directly transmitting Chinese characters to the transcoding method. In js, you can use escape for transcoding. The specific implementation is as follows. If you have any similar situation, refer to Garbled text or Garbled text, it can be solved after Tomcat is set up, but sometimes it doesn't work. In this case, we can consider using the transcoding method instead of directly uploading Chinese characters and using escape for transcoding in js, remember to use it twice, for example:

Var str = escape ("this is a Chinese parameter ");

Str = escape (str );

Xxx. do? Name = str;

In the background, use a class method to transfer back:

Escape. unescape (request. getParameter ("name "));

The Escape class is as follows:

The Code is as follows:

Package com. laneasy. hy. util;

/**
* Js coding and transcoding java Implementation class.
*
* @ Author yangjinde
*/
Public class Escape {

/** The Constant hex .*/
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 "};

/** The Constant val .*/
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 };

/**
* Escape.
*
* @ Param s
* The s
*
* @ Return the string
*/
/**
* Encoding
*
* @ Param s
* @ Return
*/
Public static String escape (String s ){
If (s! = Null ){
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 ();
}
Return null;
}

/**
* Unescape.
*
* @ Param s
* The s
*
* @ Return the string
*/
/**
* Decoding Description: This method ensures that the correct "decoding" result is obtained no matter whether the parameter s is encoded by escape ().
*
* @ Param s
* @ Return
*/
Public static String unescape (String s ){
If (s! = Null ){
StringBuffer sbuf = new StringBuffer ();
Int I = 0;
Int len = s. length ();
While (I <len ){
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 = '% '){
Int cint = 0;
If ('U '! = S. charAt (I + 1 )){
Cint = (cint <4) | val [s. charAt (I + 1)];
Cint = (cint <4) | val [s. charAt (I + 2)];
I + = 2;
} Else {
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 );
} Else {
Sbuf. append (char) ch );
}
I ++;
}
Return sbuf. toString ();
}
Return null;
}

}