jdk、oracle、js、activeX的base64实现

来源：互联网发布：sql获得系统时间编辑：程序博客网时间：2024/06/05 21:12

http://ldbjakyo.iteye.com/blog/799435

oeacle

select utl_raw.cast_to_varchar2(utl_encode.base64_encode(rawtohex('888li666dong999bo')))from dual;

javascript

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"><html><head><title> New Document </title><meta name="Generator" content="EditPlus"><meta name="Author" content="lidongbo"><meta name="Keywords" content=""><meta name="Description" content=""></head><script language="JavaScript"><!--function wr(str){document.write(str);}function gl(str){return document.getelementbyid(str);}    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><script type="text/javascript">  var b = new Base64();   var str = b.encode("888li666dong999bo");   wr("base64 encode:" + str+"<br>");   str = b.decode(str);   wr("base64 decode:" + str);   </script>   </html>

java jdk

import java.io.IOException;public class Base64 { /**       * 编码       * @param bstr       * @return String       */      public static String encode(byte[] bstr){       return new sun.misc.BASE64Encoder().encode(bstr);       }         /**       * 解码       * @param str       * @return string       */      public static byte[] decode(String str){       byte[] bt = null;       try {           sun.misc.BASE64Decoder decoder = new sun.misc.BASE64Decoder();           bt = decoder.decodeBuffer( str );       } catch (IOException e) {           e.printStackTrace();       }           return bt;       }         /**       * @param args       */      public static void main(String[] args) {               String aa = "888li666dong999bo";//"nihao123";           aa = encode(aa.getBytes());           System.out.println(aa);           String str = aa;           String str2 = new String(decode(str));           System.out.println(str2);           //        ODg4bGk2NjZkb25nOTk5Ym8=            }   }