java js转码解码

   
摘自网友：https://blog.csdn.net/sgear/article/details/1509400?utm_medium=distribute.pc_relevant.none-task-blog-OPENSEARCH-7.control&depth_1-utm_source=distribute.pc_relevant.none-task-blog-OPENSEARCH-7.control
 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();

    }

摘自网友：https://blog.csdn.net/sgear/article/details/1509400?utm_medium=distribute.pc_relevant.none-task-blog-OPENSEARCH-7.control&depth_1-utm_source=distribute.pc_relevant.none-task-blog-OPENSEARCH-7.control

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