标签:javascript java base64 加密 解密 列子 实现
前段时间,工作需要,需要用js和java配套的base64算法,奈何没找到,然后网上抄一套。用起来还是很有效的。
闲言少絮,直接上干货。
js 版base 64 算法 base64.js
var keyStr = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/="; //将Ansi编码的字符串进行Base64编码 function encode64(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 + keyStr.charAt(enc1) + keyStr.charAt(enc2) + keyStr.charAt(enc3) + keyStr.charAt(enc4); chr1 = chr2 = chr3 = ""; enc1 = enc2 = enc3 = enc4 = ""; } while (i < input.length); return output; } //将Base64编码字符串转换成Ansi编码的字符串 function decode64(input) { var output = ""; var chr1, chr2, chr3 = ""; var enc1, enc2, enc3, enc4 = ""; var i = 0; if (input.length % 4 != 0) { return ""; } var base64test = /[^A-Za-z0-9\+\/\=]/g; if (base64test.exec(input)) { return ""; } do { 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 += String.fromCharCode(chr2); } if (enc4 != 64) { output += String.fromCharCode(chr3); } chr1 = chr2 = chr3 = ""; enc1 = enc2 = enc3 = enc4 = ""; } while (i < input.length); return output; } 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; } function utf8to16(str) { var out, i, len, c; var char2, char3; out = ""; len = str.length; i = 0; while(i < len) { c = str.charCodeAt(i++); switch(c >> 4) { case 0: case 1: case 2: case 3: case 4: case 5: case 6: case 7: // 0xxxxxxx out += str.charAt(i-1); break; case 12: case 13: // 110x xxxx 10xx xxxx char2 = str.charCodeAt(i++); out += String.fromCharCode(((c & 0x1F) << 6) | (char2 & 0x3F)); break; case 14: // 1110 xxxx 10xx xxxx 10xx xxxx char2 = str.charCodeAt(i++); char3 = str.charCodeAt(i++); out += String.fromCharCode(((c & 0x0F) << 12) | ((char2 & 0x3F) << 6) | ((char3 & 0x3F) << 0)); break; } } return out; }
在js中的解析例子:
加密
var testCode= "test88"; var resultCode= encode64(utf16to8(testCode)); console.log(resultCode);
输出
dGVzdDg4
解密
var testCode="dGVzdDg4"; resultCode= utf8to16(decode64(testCode)); console.log(resultCode);
输出
test88
在java中解析base64编码:
加密
String localStr="test88"; String resultStr =Base64.getEncoder().encodeToString(localStr.getBytes()); System.out.println(resultStr);
输出
dGVzdDg4
解密
String testStr="dGVzdDg4"; String testResult=new String(Base64.getDecoder().decode(testStr)); System.out.println(testResult);
输出
test88
附件附上 base64.js 为base64加密解密的js组件,test.html 为在js中的测试文件 test.java 为java中的测试文件
本文出自 “你爸披肩发” 博客,请务必保留此出处http://nimalegebi.blog.51cto.com/5614287/1828160
javaScript base64算法的实现 与 java中的base64 加密 解密
标签:javascript java base64 加密 解密 列子 实现
原文地址:http://nimalegebi.blog.51cto.com/5614287/1828160