package com.lht.utils;
import java.io.UnsupportedEncodingException;
public class Base64Utils
private static char[] base64EncodeChars = new char[]
{ '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', '+', '/' };
private static byte[] base64DecodeChars = new byte[]
{ -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 62, -1, -1, -1, 63, 52, 53,
54, 55, 56, 57, 58, 59, 60, 61, -1, -1, -1, -1, -1, -1, -1, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11,
12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, -1, -1, -1, -1, -1, -1, 26, 27, 28, 29,
30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, -1, -1,
-1, -1, -1 };
public static String encode(byte[] data)
StringBuffer sb = new StringBuffer();
int len = data.length;
int i = 0;
int b1, b2, b3;
while (i < len)
b1 = data[i++] & 0xff;
if (i == len)
sb.append(base64EncodeChars[b1 >>> 2]);
sb.append(base64EncodeChars[(b1 & 0x3) << 4]);
sb.append("==");
break;
b2 = data[i++] & 0xff;
if (i == len)
sb.append(base64EncodeChars[b1 >>> 2]);
sb.append(base64EncodeChars[((b1 & 0x03) << 4) | ((b2 & 0xf0) >>> 4)]);
sb.append(base64EncodeChars[(b2 & 0x0f) << 2]);
sb.append("=");
break;
b3 = data[i++] & 0xff;
sb.append(base64EncodeChars[b1 >>> 2]);
sb.append(base64EncodeChars[((b1 & 0x03) << 4) | ((b2 & 0xf0) >>> 4)]);
sb.append(base64EncodeChars[((b2 & 0x0f) << 2) | ((b3 & 0xc0) >>> 6)]);
sb.append(base64EncodeChars[b3 & 0x3f]);
return sb.toString();
public static byte[] decode(String str)
return decodePrivate(str);
} catch (UnsupportedEncodingException e)
e.printStackTrace();
return new byte[]
private static byte[] decodePrivate(String str) throws UnsupportedEncodingException
StringBuffer sb = new StringBuffer();
byte[] data = null;
data = str.getBytes("US-ASCII");
int len = data.length;
int i = 0;
int b1, b2, b3, b4;
while (i < len)
b1 = base64DecodeChars[data[i++]];
} while (i < len && b1 == -1);
if (b1 == -1)
break;
b2 = base64DecodeChars[data[i++]];
} while (i < len && b2 == -1);
if (b2 == -1)
break;
sb.append((char) ((b1 << 2) | ((b2 & 0x30) >>> 4)));
b3 = data[i++];
if (b3 == 61)
return sb.toString().getBytes("iso8859-1");
b3 = base64DecodeChars[b3];
} while (i < len && b3 == -1);
if (b3 == -1)
break;
sb.append((char) (((b2 & 0x0f) << 4) | ((b3 & 0x3c) >>> 2)));
b4 = data[i++];
if (b4 == 61)
return sb.toString().getBytes("iso8859-1");
b4 = base64DecodeChars[b4];
} while (i < len && b4 == -1);
if (b4 == -1)
break;
sb.append((char) (((b3 & 0x03) << 6) | b4));
return sb.toString().getBytes("iso8859-1");
https://github.com/lhtzbj12/java_android_encryption
前言C#、Golang、Python、Java（Android）之间Des、Rsa加解密互通系列之前言C#、Golang、Python、Java（Android）之间Des、Rsa加解密互通系列之C#C#、Golang、Python、Java（Android）之间Des、Rsa加解密互通系列之GolangC#、Golang、Python、Java（Android）之间Des、Rsa加解密...
参考文章:
https://www.cnblogs.com/linuxcat/p/14494630.html
https://www.cnblogs.com/niuu/p/10107212.html
https://blog.csdn.net/u012119316/article/details/111193890
python环境 python3.7.5
安装包: pip install pycryptodome 很重要
python版本的算法有个问题,就是不能加密中文
from Crypto
import jdk.internal.org.objectweb.asm.tree.TryCatchBlockNode;
import java.lang.reflect.Field;
import java.security.KeyFactory;
import java.security.KeyPair;
import java.security...
C#有自己的一套生成密钥、加解密的库，但是跟其他文互通比较费劲，经过一翻比较后，笔者选择了BouncyCastle这套库，而这套库的缺点是文档很少，只能参考Java的代码才把需求的功能实现。笔者下面提供的代码是经过多语言环境验证的代码，可以与其他语言互通。
Des对称加密工具类
using System;
using System.IO;
using System.Security.C...
public final class DesUtils {
private static final String DES = "DES";
private static final String KEY = "4YztMHI7PsT4rLZN";
private DesUtils() {}
private static byte[] enc...
