js端转码代码:
function searchJump(key){ key = base64encode(utf16to8(key)); window.location.href = "/search/" + key+".html"; } var base64EncodeChars = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+!"; function base64encode(str) { var out, i, len; var c1, c2, c3; len = str.length; i = 0; out = ""; while (i < len) { c1 = str.charCodeAt(i++) & 0xff; if (i == len) { out += base64EncodeChars.charAt(c1 >> 2); out += base64EncodeChars.charAt((c1 & 0x3) << 4); out += "=="; break; } c2 = str.charCodeAt(i++); if (i == len) { out += base64EncodeChars.charAt(c1 >> 2); out += base64EncodeChars.charAt(((c1 & 0x3) << 4) | ((c2 & 0xF0) >> 4)); out += base64EncodeChars.charAt((c2 & 0xF) << 2); out += "="; break; } c3 = str.charCodeAt(i++); out += base64EncodeChars.charAt(c1 >> 2); out += base64EncodeChars.charAt(((c1 & 0x3) << 4) | ((c2 & 0xF0) >> 4)); out += base64EncodeChars.charAt(((c2 & 0xF) << 2) | ((c3 & 0xC0) >> 6)); out += base64EncodeChars.charAt(c3 & 0x3F); } return out; } function utf16to8(str) { var out, i, len, c; out = ""; len = str.length; for (i = 0; i < len; i++) { c = str.charCodeAt(i); if ((c >= 0x0001) && (c <= 0x007F)) { out += str.charAt(i); } else if (c > 0x07FF) { out += String.fromCharCode(0xE0 | ((c >> 12) & 0x0F)); out += String.fromCharCode(0x80 | ((c >> 6) & 0x3F)); out += String.fromCharCode(0x80 | ((c >> 0) & 0x3F)); } else { out += String.fromCharCode(0xC0 | ((c >> 6) & 0x1F)); out += String.fromCharCode(0x80 | ((c >> 0) & 0x3F)); } } return out; }
java的转码代码:
package com.savetao.util; public class Base64 { private static final char[] S_BASE64CHAR = { 'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z', 'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z', '0', '1', '2', '3', '4', '5', '6', '7', '8','9','+','!' }; private static final char S_BASE64PAD = '='; private static final byte[] S_DECODETABLE = new byte[128]; static { for (int i = 0; i < S_DECODETABLE.length; i ++) S_DECODETABLE[i] = Byte.MAX_VALUE; // 127 for (int i = 0; i < S_BASE64CHAR.length; i ++) // 0 to 63 S_DECODETABLE[S_BASE64CHAR[i]] = (byte)i; } private static int decode0(char[] ibuf, byte[] obuf, int wp) { int outlen = 3; if (ibuf[3] == S_BASE64PAD) outlen = 2; if (ibuf[2] == S_BASE64PAD) outlen = 1; int b0 = S_DECODETABLE[ibuf[0]]; int b1 = S_DECODETABLE[ibuf[1]]; int b2 = S_DECODETABLE[ibuf[2]]; int b3 = S_DECODETABLE[ibuf[3]]; switch (outlen) { case 1: obuf[wp] = (byte)(b0 << 2 & 0xfc | b1 >> 4 & 0x3); return 1; case 2: obuf[wp++] = (byte)(b0 << 2 & 0xfc | b1 >> 4 & 0x3); obuf[wp] = (byte)(b1 << 4 & 0xf0 | b2 >> 2 & 0xf); return 2; case 3: obuf[wp++] = (byte)(b0 << 2 & 0xfc | b1 >> 4 & 0x3); obuf[wp++] = (byte)(b1 << 4 & 0xf0 | b2 >> 2 & 0xf); obuf[wp] = (byte)(b2 << 6 & 0xc0 | b3 & 0x3f); return 3; default: throw new RuntimeException("Couldn't decode."); } } public static byte[] decode(String data) { char[] ibuf = new char[4]; int ibufcount = 0; byte[] obuf = new byte[data.length()/4*3+3]; int obufcount = 0; for (int i = 0; i < data.length(); i ++) { char ch = data.charAt(i); if (ch == S_BASE64PAD || ch < S_DECODETABLE.length && S_DECODETABLE[ch] != Byte.MAX_VALUE) { ibuf[ibufcount++] = ch; if (ibufcount == ibuf.length) { ibufcount = 0; obufcount += decode0(ibuf, obuf, obufcount); } } } if (obufcount == obuf.length) return obuf; byte[] ret = new byte[obufcount]; System.arraycopy(obuf, 0, ret, 0, obufcount); return ret; } public static String encode(byte[] data) { return encode(data, 0, data.length); } public static String encode(byte[] data, int off, int len) { if (len <= 0) return ""; char[] out = new char[len/3*4+4]; int rindex = off; int windex = 0; int rest = len-off; while (rest >= 3) { int i = ((data[rindex]&0xff)<<16) +((data[rindex+1]&0xff)<<8) +(data[rindex+2]&0xff); out[windex++] = S_BASE64CHAR[i>>18]; out[windex++] = S_BASE64CHAR[(i>>12)&0x3f]; out[windex++] = S_BASE64CHAR[(i>>6)&0x3f]; out[windex++] = S_BASE64CHAR[i&0x3f]; rindex += 3; rest -= 3; } if (rest == 1) { int i = data[rindex]&0xff; out[windex++] = S_BASE64CHAR[i>>2]; out[windex++] = S_BASE64CHAR[(i<<4)&0x3f]; out[windex++] = S_BASE64PAD; out[windex++] = S_BASE64PAD; } else if (rest == 2) { int i = ((data[rindex]&0xff)<<8)+(data[rindex+1]&0xff); out[windex++] = S_BASE64CHAR[i>>10]; out[windex++] = S_BASE64CHAR[(i>>4)&0x3f]; out[windex++] = S_BASE64CHAR[(i<<2)&0x3f]; out[windex++] = S_BASE64PAD; } return new String(out, 0, windex); } public static void main(String []args){ String s="美国队长"; System.out.println(Base64.encode(s.getBytes())); System.out.println(new String(Base64.decode("576O5Zu96Zif6ZW!"))); } }