文章目录
1、Java类
package com.esint.ztb.util;
import sun.misc.base64Decoder;
import sun.misc.base64Encoder;
import java.io.UnsupportedEncodingException;
//应对明文传输问题
public class base64 {
// 加密
public static String encode(String str) {
byte[] b = null;
String s = null;
try {
b = str.getBytes("utf-8");
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
}
if (b != null) {
s = new base64Encoder().encode(b);
//据RFC 822规定，每76个字符，还需要加上一个回车换行去掉换行符
s = s.replaceAll("[\s*tnr]", "");
}
return s;
}
// 解密
public static String decode(String s) {
byte[] b = null;
String result = null;
if (s != null) {
base64Decoder decoder = new base64Decoder();
try {
b = decoder.decodeBuffer(s);
result = new String(b, "utf-8");
} catch (Exception e) {
e.printStackTrace();
}
}
return result;
}
//使用方法
public static void main(String[] args){
String s = "你好，The Word!";
//System.out.println(s.length());
String enStr = encode(s);
String deStr = decode(enStr);
System.out.println("原始数据："+s+"n加密数据："+enStr+"n解密数据："+deStr);
}
}
2、js
;(function (root, factory) {
if (typeof exports === "object") {
// CommonJS
module.exports = exports = factory();
}
else if (typeof define === "function" && define.amd) {
// AMD
define(factory);
}
else {
// Global (browser)
window.base64 = factory();
}
}(this, function () {
var base64_MAPPING = [
'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', '+', '/'
];
var URLSAFE_base64_MAPPING = [
'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', '-', '_'
];
var _toBinary = function (ascii) {
var binary = [];
while (ascii > 0) {
var b = ascii % 2;
ascii = Math.floor(ascii / 2);
binary.push(b);
}
binary.reverse();
return binary;
};
var _toDecimal = function (binary) {
var dec = 0;
var p = 0;
for (var i = binary.length - 1; i >= 0; --i) {
var b = binary[i];
if (b == 1) {
dec += Math.pow(2, p);
}
++p;
}
return dec;
};
var _toUTF8Binary = function (c, binaryArray) {
var mustLen = (8 - (c + 1)) + ((c - 1) * 6);
var fatLen = binaryArray.length;
var diff = mustLen - fatLen;
while (--diff >= 0) {
binaryArray.unshift(0);
}
var binary = [];
var _c = c;
while (--_c >= 0) {
binary.push(1);
}
binary.push(0);
var i = 0, len = 8 - (c + 1);
for (; i < len; ++i) {
binary.push(binaryArray[i]);
}
for (var j = 0; j < c - 1; ++j) {
binary.push(1);
binary.push(0);
var sum = 6;
while (--sum >= 0) {
binary.push(binaryArray[i++]);
}
}
return binary;
};
var _toBinaryArray = function (str) {
var binaryArray = [];
for (var i = 0, len = str.length; i < len; ++i) {
var unicode = str.charCodeAt(i);
var _tmpBinary = _toBinary(unicode);
if (unicode < 0x80) {
var _tmpdiff = 8 - _tmpBinary.length;
while (--_tmpdiff >= 0) {
_tmpBinary.unshift(0);
}
binaryArray = binaryArray.concat(_tmpBinary);
} else if (unicode >= 0x80 && unicode <= 0x7FF) {
binaryArray = binaryArray.concat(_toUTF8Binary(2, _tmpBinary));
} else if (unicode >= 0x800 && unicode <= 0xFFFF) {//UTF-8 3byte
binaryArray = binaryArray.concat(_toUTF8Binary(3, _tmpBinary));
} else if (unicode >= 0x10000 && unicode <= 0x1FFFFF) {//UTF-8 4byte
binaryArray = binaryArray.concat(_toUTF8Binary(4, _tmpBinary));
} else if (unicode >= 0x200000 && unicode <= 0x3FFFFFF) {//UTF-8 5byte
binaryArray = binaryArray.concat(_toUTF8Binary(5, _tmpBinary));
} else if (unicode >= 4000000 && unicode <= 0x7FFFFFFF) {//UTF-8 6byte
binaryArray = binaryArray.concat(_toUTF8Binary(6, _tmpBinary));
}
}
return binaryArray;
};
var _toUnicodeStr = function (binaryArray) {
var unicode;
var unicodeBinary = [];
var str = "";
for (var i = 0, len = binaryArray.length; i < len;) {
if (binaryArray[i] == 0) {
unicode = _toDecimal(binaryArray.slice(i, i + 8));
str += String.fromCharCode(unicode);
i += 8;
} else {
var sum = 0;
while (i < len) {
if (binaryArray[i] == 1) {
++sum;
} else {
break;
}
++i;
}
unicodeBinary = unicodeBinary.concat(binaryArray.slice(i + 1, i + 8 - sum));
i += 8 - sum;
while (sum > 1) {
unicodeBinary = unicodeBinary.concat(binaryArray.slice(i + 2, i + 8));
i += 8;
--sum;
}
unicode = _toDecimal(unicodeBinary);
str += String.fromCharCode(unicode);
unicodeBinary = [];
}
}
return str;
};
var _encode = function (str, url_safe) {
var base64_Index = [];
var binaryArray = _toBinaryArray(str);
var dictionary = url_safe ? URLSAFE_base64_MAPPING : base64_MAPPING;
var extra_Zero_Count = 0;
for (var i = 0, len = binaryArray.length; i < len; i += 6) {
var diff = (i + 6) - len;
if (diff == 2) {
extra_Zero_Count = 2;
} else if (diff == 4) {
extra_Zero_Count = 4;
}
var _tmpExtra_Zero_Count = extra_Zero_Count;
while (--_tmpExtra_Zero_Count >= 0) {
binaryArray.push(0);
}
base64_Index.push(_toDecimal(binaryArray.slice(i, i + 6)));
}
var base64 = '';
for (var i = 0, len = base64_Index.length; i < len; ++i) {
base64 += dictionary[base64_Index[i]];
}
for (var i = 0, len = extra_Zero_Count / 2; i < len; ++i) {
base64 += '=';
}
return base64;
};
var _decode = function (_base64Str, url_safe) {
var _len = _base64Str.length;
var extra_Zero_Count = 0;
var dictionary = url_safe ? URLSAFE_base64_MAPPING : base64_MAPPING;
if (_base64Str.charAt(_len - 1) == '=') {
if (_base64Str.charAt(_len - 2) == '=') {//两个等号说明补了4个0
extra_Zero_Count = 4;
_base64Str = _base64Str.substring(0, _len - 2);
} else {//一个等号说明补了2个0
extra_Zero_Count = 2;
_base64Str = _base64Str.substring(0, _len - 1);
}
}
var binaryArray = [];
for (var i = 0, len = _base64Str.length; i < len; ++i) {
var c = _base64Str.charAt(i);
for (var j = 0, size = dictionary.length; j < size; ++j) {
if (c == dictionary[j]) {
var _tmp = _toBinary(j);
var _tmpLen = _tmp.length;
if (6 - _tmpLen > 0) {
for (var k = 6 - _tmpLen; k > 0; --k) {
_tmp.unshift(0);
}
}
binaryArray = binaryArray.concat(_tmp);
break;
}
}
}
if (extra_Zero_Count > 0) {
binaryArray = binaryArray.slice(0, binaryArray.length - extra_Zero_Count);
}
var str = _toUnicodeStr(binaryArray);
return str;
};
var __base64 = {
encode: function (str) {
return _encode(str, false);
},
decode: function (base64Str) {
return _decode(base64Str, false);
},
urlsafe_encode: function (str) {
return _encode(str, true);
},
urlsafe_decode: function (base64Str) {
return _decode(base64Str, true);
}
};
return __base64;
}));
//获得加密字符解密后的json对象
function getJsonObDatabase(data){
var data = base64.decode(data.signData);
var jQuery1 = jQuery.parseJSON(data);
return jQuery1;
}
