Java
package bruce.lib;
import java.io.IOException;
public class Base64 {
public static String encode(String s) {
return s == null ? null : (new sun.misc.BASE64Encoder()).encode(s.getBytes());
}
public static String decode(String s) throws IOException {
return s == null ? null : new String((new sun.misc.BASE64Decoder()).decodeBuffer(s));
}
}
c#
using System;
using System.Text;
namespace Bruce.Lib
{
public class Base64
{
/// <summary>
/// 簡單的BASE64編碼
/// </summary>
/// <param name="s">要編碼的字串</param>
/// <returns>編碼後的字串</returns>
public static string Encode(string s)
{
return string.IsNullOrEmpty(s) ? s : Convert.ToBase64String(Encoding.UTF8.GetBytes(s.ToString()));
}
/// <summary>
/// 簡單的BASE64解碼
/// </summary>
/// <param name="s">要解碼的字串</param>
/// <returns>解碼後的字串</returns>
public static string Decode(string s)
{
return string.IsNullOrEmpty(s) ? s : Encoding.UTF8.GetString(Convert.FromBase64String(s));
}
}
}
Javascript
/**
*
* Base64 encode / decode
* http://www.webtoolkit.info/
*
**/
var JSUtil = {
keyStr : "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=",
encodeBASE64 : function(input){
input = this._utf8_encode(input);
var output = "";
var chr1, chr2, chr3;
var enc1, enc2, enc3, enc4;
var i = 0;
do {
chr1 = input.charCodeAt(i++);
chr2 = input.charCodeAt(i++);
chr3 = input.charCodeAt(i++);
enc1 = chr1 >> 2;
enc2 = ((chr1 & 3) << 4) | (chr2 >> 4);
enc3 = ((chr2 & 15) << 2) | (chr3 >> 6);
enc4 = chr3 & 63;
if (isNaN(chr2)) {
enc3 = enc4 = 64;
} else if (isNaN(chr3)) {
enc4 = 64;
}
output = output + this.keyStr.charAt(enc1) + this.keyStr.charAt(enc2) +
this.keyStr.charAt(enc3) + this.keyStr.charAt(enc4);
} while (i < input.length);
return output;
},
decodeBASE64 : function(input){
var output = "";
var chr1, chr2, chr3;
var enc1, enc2, enc3, enc4;
var i = 0;
// remove all characters that are not A-Z, a-z, 0-9, +, /, or =
input = input.replace(/[^A-Za-z0-9\+\/\=]/g, "");
do {
enc1 = this.keyStr.indexOf(input.charAt(i++));
enc2 = this.keyStr.indexOf(input.charAt(i++));
enc3 = this.keyStr.indexOf(input.charAt(i++));
enc4 = this.keyStr.indexOf(input.charAt(i++));
chr1 = (enc1 << 2) | (enc2 >> 4);
chr2 = ((enc2 & 15) << 4) | (enc3 >> 2);
chr3 = ((enc3 & 3) << 6) | enc4;
output = output + String.fromCharCode(chr1);
if (enc3 != 64) {
output = output + String.fromCharCode(chr2);
}
if (enc4 != 64) {
output = output + String.fromCharCode(chr3);
}
} while (i < input.length);
return this._utf8_decode(output);
},
// private method for UTF-8 encoding
_utf8_encode : function (string) {
string = string.replace(/\r\n/g,"\n");
var utftext = "";
for (var n = 0; n < string.length; n++) {
var c = string.charCodeAt(n);
if (c < 128) {
utftext += String.fromCharCode(c);
}
else if((c > 127) && (c < 2048)) {
utftext += String.fromCharCode((c >> 6) | 192);
utftext += String.fromCharCode((c & 63) | 128);
}
else {
utftext += String.fromCharCode((c >> 12) | 224);
utftext += String.fromCharCode(((c >> 6) & 63) | 128);
utftext += String.fromCharCode((c & 63) | 128);
}
}
return utftext;
},
// private method for UTF-8 decoding
_utf8_decode : function (utftext) {
var string = "";
var i = 0;
var c = c1 = c2 = 0;
while ( i < utftext.length ) {
c = utftext.charCodeAt(i);
if (c < 128) {
string += String.fromCharCode(c);
i++;
}
else if((c > 191) && (c < 224)) {
c2 = utftext.charCodeAt(i+1);
string += String.fromCharCode(((c & 31) << 6) | (c2 & 63));
i += 2;
}
else {
c2 = utftext.charCodeAt(i+1);
c3 = utftext.charCodeAt(i+2);
string += String.fromCharCode(((c & 15) << 12) | ((c2 & 63) << 6) | (c3 & 63));
i += 3;
}
}
return string;
}
}
Posts
