I am using the URLUTF8Encoder.java class from W3C (www.w3.org/International/URLUTF8Encoder.java).
Currently, it will encode any blank spaces ' ' into plus signs '+'.
I am having difficulty modifying the code to percent-encode the blank space into '%20'. Unfortunately, I am not too familiar with hex. Can anyone help me out? I need to modify this snippet...
else if (ch == ' ') { // space
sbuf.append('+');
in the following code:
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" };
public static String encode(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') { // 'A'..'Z'
sbuf.append((char) ch);
} else if ('a' <= ch && ch <= 'z') { // 'a'..'z'
sbuf.append((char) ch);
} else if ('0' <= ch && ch <= '9') { // '0'..'9'
sbuf.append((char) ch);
} else if (ch == ' ') { // space
sbuf.append('+');
} else if (ch == '-'
|| ch == '_' // unreserved
|| ch == '.' || ch == '!' || ch == '~' || ch == '*'
|| ch == '\'' || ch == '(' || ch == ')') {
sbuf.append((char) ch);
} else if (ch <= 0x007f) { // other ASCII
sbuf.append(hex[ch]);
} else if (ch <= 0x07FF) { // non-ASCII <= 0x7FF
sbuf.append(hex[0xc0 | (ch >> 6)]);
sbuf.append(hex[0x80 | (ch & 0x3F)]);
} else { // 0x7FF < ch <= 0xFFFF
sbuf.append(hex[0xe0 | (ch >> 12)]);
sbuf.append(hex[0x80 | ((ch >> 6) & 0x3F)]);
sbuf.append(hex[0x80 | (ch & 0x3F)]);
}
}
return sbuf.toString();
}
Thanks!
I won't ask why you're doing this, and just answer your question directly. Please read other answers to determine if you really want to be modifying this code. If you just remove the code:
else if (ch == ' ') { // space
sbuf.append('+');
}
It will do what you want, because the space character will be taken care of by the code:
else if (ch <= 0x007f) { // other ASCII
sbuf.append(hex[ch]);
}