本文实例讲述了AngularJS实现的base64编码与解码功能。分享给大家供大家参考，具体如下：
<!DOCTYPE HTML>
<html>
<head>
<meta charset="utf-8">
<title>base64加密</title>
<script src="http://apps.bdimg.com/libs/angular.js/1.4.6/angular.min.js"></script>
<script>
function Base64() {
// private property
_keyStr = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789 /=";
// public method for encoding
this.encode = function (input) {
var output = "";
var chr1, chr2, chr3, enc1, enc2, enc3, enc4;
var i = 0;
input = _utf8_encode(input);
while (i < input.length) {
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
_keyStr.charAt(enc1) _keyStr.charAt(enc2)
_keyStr.charAt(enc3) _keyStr.charAt(enc4);
}
return output;
}
// public method for decoding
this.decode = function (input) {
var output = "";
var chr1, chr2, chr3;
var enc1, enc2, enc3, enc4;
var i = 0;
input = input.replace(/[^A-Za-z0-9\ \/\=]/g, "");
while (i < input.length) {
enc1 = _keyStr.indexOf(input.charAt(i ));
enc2 = _keyStr.indexOf(input.charAt(i ));
enc3 = _keyStr.indexOf(input.charAt(i ));
enc4 = _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);
}
}
output = _utf8_decode(output);
return 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;
}
}
</script>
</head>
<body>
<p id="p1">PHAgc3R5bGU9ImxpbmUtaGVpZ2h0OiAyZW07Ij48c3BhbiBzdHlsZT0iZm9udC1zaXplOiAxNnB4OyBmb250LWZhbWlseTog5b6u6L2v6ZuF6buRLCAnTWljcm9zb2Z0IFlhSGVpJzsiPu 7vzxpbWcgc3JjPSJodHRwOi8vd3d3LmpiNTEubmV0L2ltYWdlcy9sb2dvLmdpZiIgdGl0bGU9ImxvZ28uZ2lmIi8 PC9zcGFuPjwvcD48cCBzdHlsZT0idGV4dC1pbmRlbnQ6IDJlbTsgbGluZS1oZWlnaHQ6IDJlbTsiPjxzcGFuIHN0eWxlPSJmb250LXNpemU6IDE2cHg7IGZvbnQtZmFtaWx5OiDlvq7ova/pm4Xpu5EsICdNaWNyb3NvZnQgWWFIZWknOyI 5qyi6L O6K6/6Zeu6ISa5pys5LmL5a62PC9zcGFuPjwvcD48cCBzdHlsZT0ibWFyZ2luLXRvcDogMHB4OyBtYXJnaW4tYm90dG9tOiAwcHg7IHBhZGRpbmc6IDBweDsgdGV4dC1pbmRlbnQ6IDJlbTsgY29sb3I6IHJnYigzNCwgMzQsIDM0KTsgZm9udC1mYW1pbHk6ICdNaWNyb3NvZnQgWWFIZWknLCDlvq7ova/pm4Xpu5E7IGZvbnQtc2l6ZTogMTRweDsgd2hpdGUtc3BhY2U6IG5vcm1hbDsgbGluZS1oZWlnaHQ6IDJlbTsiPjxzcGFuIHN0eWxlPSJmb250LXNpemU6IDE2cHg7IGZvbnQtZmFtaWx5OiDlvq7ova/pm4Xpu5EsICdNaWNyb3NvZnQgWWFIZWknOyI 6ISa5pys5LmL5a625piv5Zu95YaF5LiT5Lia55qE572R56uZ5bu66K6 6LWE5rqQ44CB6ISa5pys57yW56iL5a2m5Lmg57G7572R56uZ77yM5o Q5L6bYXNw44CBcGhw44CBYXNwLm5ldOOAgWphdmFzY3JpcHTjgIFqcXVlcnnjgIF2YnNjcmlwdOOAgWRvc aJueWkhOeQhuOAgee9kemhteWItuS9nOOAgee9kee7nOe8lueoi OAgee9keermeW7uuiuvuetiee8lueoi i1hOaWmeOAgjwvc3Bhbj48L3A PHAgc3R5bGU9Im1hcmdpbi10b3A6IDBweDsgbWFyZ2luLWJvdHRvbTogMHB4OyBwYWRkaW5nOiAwcHg7IHRleHQtaW5kZW50OiAyZW07IGNvbG9yOiByZ2IoMzQsIDM0LCAzNCk7IGZvbnQtZmFtaWx5OiAnTWljcm9zb2Z0IFlhSGVpJywg5b6u6L2v6ZuF6buROyBmb250LXNpemU6IDE0cHg7IHdoaXRlLXNwYWNlOiBub3JtYWw7IGxpbmUtaGVpZ2h0OiAyZW07Ij48c3BhbiBzdHlsZT0iZm9udC1zaXplOiAxNnB4OyBmb250LWZhbWlseTog5b6u6L2v6ZuF6buRLCAnTWljcm9zb2Z0IFlhSGVpJzsiPui/memHjOi/mOaPkOS m Wkp mHj eahOa6kOeggeOAgeeUteWtkOS5puS4i i9ve 8jOS7peWPiuWQhOenjeW4uOingeeahOWunueUqOWcqOe6v W3peWFtzwvc3Bhbj48L3A </p>
<script>
var b = new Base64();
str = document.getElementById("p1").innerHTML;
//解密
str = b.decode(str);
document.getElementById("p1").innerHTML = str;
</script>
</body>
</html>
运行效果如下：
PS：这里再推荐几款相关在线工具供大家参考：
在线编码转换工具(utf-8/utf-32/Punycode/Base64)：
http://tools.jb51.net/transcoding/decode_encode_tool
BASE64编码解码工具：
http://tools.jb51.net/transcoding/base64
图片转换为Base64编码在线工具：
http://tools.jb51.net/transcoding/img2base64
更多关于AngularJS相关内容感兴趣的读者可查看本站专题：《AngularJS指令操作技巧总结》、《AngularJS入门与进阶教程》及《AngularJS MVC架构总结》
希望本文所述对大家AngularJS程序设计有所帮助。