- /**
- * JavaScript escape/unescape 编码的 Java 实现
- * author jackyz
- * keep this copyright info while using this method by free
- */
- 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 (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();
- }
- 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 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 == '%') {
- 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();
- }
- public static void main(String[] args) {
- String stest = "黄修群1234 abcd[]()<+>,.~//";
- System.out.println(stest);
- System.out.println(escape(stest));
- System.out.println(unescape(escape(stest)));
- }
- }
java 中 escape编码与解码
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转载自blog.csdn.net/qq_32331997/article/details/79104628
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