js加密jsp解密

近有人问我js加密jsp解密的问题,我查阅的有关资料,没有找到直接js加密jsp解密的方法,不过我下面这段代码已经解决的这个问题:

/**
* 这里是jsp与js地址栏中文参数加密与解密
*/
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 >>> ]);
                    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)) {
                        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);
                }
                i++;
            }
            return sbuf.toString();
        }
        public static void main(String[] args) {
            String stest = "中文1234 abcd[]()<+>,.~\\";
            System.out.println(stest);
            System.out.println(escape(stest));
            System.out.println(unescape(escape(stest)));
        }
}

在js中应从这么写:........sendRequest("sites.jsp?name=" + escape(escape("中文")));//代表ajax请求sites.jsp?name=中文,具体代码我在这儿就不写了.......

在jsp中应从这么写:.....<%String name = Escape.unescape(request.getParameter("name"));//取ajax传过来的中文,如果没有中文可以不加密%>.....接下来处理请求返回值,这就不用我说了吧,你可以根据你的具体需求来做......