java版本自己封装base64
package com.qhong;
import java.io.UnsupportedEncodingException;
import org.apache.commons.lang.StringUtils;
public class Base64Utils {
/**
* Base64方法重写
*/
public static void main(String[] args) {
String aa = "商户私有域";
String aaa = byteArrayToBase64(aa.getBytes());
System.out.println(aaa);
try {
String bb = new String(base64ToByteArray(aaa));
System.out.println(bb);
String tests = encodeBuffer("【厚本金融】", "GBK");
System.out.println(tests);
System.out.println(decodeBuffer(tests, "GBK"));
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
/**
* 将字符数组base64字符串
* @param a 要转化的字符数组
* @return base64字符串
*/
public static String byteArrayToBase64(byte[] a) {
int aLen = a.length; //总长度
int numFullGroups = aLen / 3; //以3个byte组成以4个字符为一组的组数
int numBytesInPartialGroup = aLen - 3 * numFullGroups; //余数
int resultLen = 4 * ((aLen + 2) / 3); //输出长度总是4倍数，如果有余数，(aLen+2)/3保证将余数包含，并有空间放置填充符=
StringBuffer result = new StringBuffer(resultLen);
int inCursor = 0;
for (int i = 0; i < numFullGroups; i++) {
int byte0 = a[inCursor++] & 0xff;
int byte1 = a[inCursor++] & 0xff;
int byte2 = a[inCursor++] & 0xff;
result.append(intToBase64[byte0 >> 2]);
result.append(intToBase64[(byte0 << 4) & 0x3f | (byte1 >> 4)]);
result.append(intToBase64[(byte1 << 2) & 0x3f | (byte2 >> 6)]);
result.append(intToBase64[byte2 & 0x3f]);
}
//处理余数
if (numBytesInPartialGroup != 0) {
int byte0 = a[inCursor++] & 0xff;
result.append(intToBase64[byte0 >> 2]);
//余数为1
if (numBytesInPartialGroup == 1) {
result.append(intToBase64[(byte0 << 4) & 0x3f]);
result.append("==");
} else {
// 余数为2
int byte1 = a[inCursor++] & 0xff;
result.append(intToBase64[(byte0 << 4) & 0x3f | (byte1 >> 4)]);
result.append(intToBase64[(byte1 << 2) & 0x3f]);
result.append('=');
}
}
return result.toString();
}
static final char intToBase64[] = { 'A', 'B', 'C', 'D', 'E', 'F', /* 索引 0 ~ 5*/
'G', 'H', 'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P', 'Q', 'R', 'S', /* 索引6 ~ 18*/
'T', 'U', 'V', 'W', 'X', 'Y', 'Z', 'a', 'b', 'c', 'd', 'e', 'f', /* 索引 19 ~ 31*/
'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o', 'p', 'q', 'r', 's', /* 索引 32 ~ 44*/
't', 'u', 'v', 'w', 'x', 'y', 'z', '0', '1', '2', '3', '4', '5', /* 索引 45 ~ 57*/
'6', '7', '8', '9', '.'/*原先是字符+*/, '_'/*原先是字符/ */ }; /* 索引58 ~ 63*/
/**
* base64字符串还原为字符数组
* @param s base64字符串
* @return 还原后的字符串数组
* @throws Exception
*/
public static byte[] base64ToByteArray(String s) throws Exception {
//字符总长必须是4的倍数
int sLen = s.length();
int numGroups = sLen / 4;
if (4 * numGroups != sLen)
throw new IllegalArgumentException(
"字串长度必须是4的倍数");
//余1个byte则算漏了两个byte，余2个byte则算漏掉了1个byte
int missingBytesInLastGroup = 0;
int numFullGroups = numGroups;
if (sLen != 0) {
//余2个byte的情况
if (s.charAt(sLen - 1) == '=') {
missingBytesInLastGroup++;
//如果有余数发生，则完整3个byte组数少一个。
numFullGroups--;
}
//余1个byte的情况
if (s.charAt(sLen - 2) == '=')
missingBytesInLastGroup++;
}
//总字节长度
byte[] result = new byte[3 * numGroups - missingBytesInLastGroup];
try {
int inCursor = 0, outCursor = 0;
for (int i = 0; i < numFullGroups; i++) {
int ch0 = base64toInt(s.charAt(inCursor++), base64ToInt);
int ch1 = base64toInt(s.charAt(inCursor++), base64ToInt);
int ch2 = base64toInt(s.charAt(inCursor++), base64ToInt);
int ch3 = base64toInt(s.charAt(inCursor++), base64ToInt);
result[outCursor++] = (byte) ((ch0 << 2) | (ch1 >> 4));
result[outCursor++] = (byte) ((ch1 << 4) | (ch2 >> 2));
result[outCursor++] = (byte) ((ch2 << 6) | ch3);
}
if (missingBytesInLastGroup != 0) {
int ch0 = base64toInt(s.charAt(inCursor++), base64ToInt);
int ch1 = base64toInt(s.charAt(inCursor++), base64ToInt);
//不管余1还是余2个byte，肯定要解码一个byte。
result[outCursor++] = (byte) ((ch0 << 2) | (ch1 >> 4));
//如果余2个，即差一个才构成3byte，那么还要解码第二个byte。
if (missingBytesInLastGroup == 1) {
int ch2 = base64toInt(s.charAt(inCursor++), base64ToInt);
result[outCursor++] = (byte) ((ch1 << 4) | (ch2 >> 2));
}
}
} catch (Exception e) {
throw e;
}
return result;
}
private static int base64toInt(char c, byte[] alphaToInt) throws Exception {
int result = alphaToInt[c];
if (result < 0)
throw new Exception("illegal index!");//非法索引值
return result;
}
static final byte base64ToInt[] = { -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, -1/*原先是62*/, -1, -1, 62/*原先是-1*/, -1/*原先是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,
63/*原先是-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 };
/**
* @param str原始中文字符串
* @param charset进行二进制字符串转化的字符编码
* @return 二进制字符串
*/
public static String encodeBuffer(String str ,String charset){
if (str == null) {
str = StringUtils.EMPTY;
}
try {
return Base64Utils.byteArrayToBase64(str.getBytes(charset));
} catch (UnsupportedEncodingException e) {
return new String();
}
}
/**
* 此方法为还原中文字符串转化后的二进制字符串
* @param str 二进制字符串
* @param charset 字符编码
* @return 正常中文字符串
*/
public static String decodeBuffer(String str ,String charset){
if (str == null) {
return str = StringUtils.EMPTY;
}
try {
byte[] byteStr;
try {
byteStr = Base64Utils.base64ToByteArray(str.trim());
} catch (Exception e) {
return new String();
}
return new String(byteStr,charset);
} catch (UnsupportedEncodingException e) {
return new String();
}
}
}与上面对应的net版本：
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.IO;
using System.Text.RegularExpressions; namespace ConsoleApplication2
{
public class Base64Utils
{ ///**
// * Base64方法重写
// */
//public static void main(String[] args)
//{ // String aa = "商户私有域"; // String aaa = byteArrayToBase64(aa.getBytes());
// System.out.println(aaa);
// try
// {
// String bb = new String(base64ToByteArray(aaa));
// System.out.println(bb); // String tests = encodeBuffer("【厚本金融】", "GBK");
// System.out.println(tests);
// System.out.println(decodeBuffer(tests, "GBK"));
// }
// catch (Exception e)
// {
// // TODO Auto-generated catch block
// e.printStackTrace();
// }
//} /**
* 将字符数组base64字符串
* @param a 要转化的字符数组
* @return base64字符串
*/
public static String byteArrayToBase64(byte[] a)
{
int aLen = a.Length; //总长度
int numFullGroups = aLen / 3; //以3个byte组成以4个字符为一组的组数
int numBytesInPartialGroup = aLen - 3 * numFullGroups; //余数
int resultLen = 4 * ((aLen + 2) / 3); //输出长度总是4倍数，如果有余数，(aLen+2)/3保证将余数包含，并有空间放置填充符= //StringBuffer result = new StringBuffer(resultLen);
StringBuilder result = new StringBuilder(resultLen);
int inCursor = 0;
for (int i = 0; i < numFullGroups; i++)
{
int byte0 = a[inCursor++] & 0xff;
int byte1 = a[inCursor++] & 0xff;
int byte2 = a[inCursor++] & 0xff;
result.Append(intToBase64[byte0 >> 2]);
result.Append(intToBase64[(byte0 << 4) & 0x3f | (byte1 >> 4)]);
result.Append(intToBase64[(byte1 << 2) & 0x3f | (byte2 >> 6)]);
result.Append(intToBase64[byte2 & 0x3f]);
}
//处理余数
if (numBytesInPartialGroup != 0)
{
int byte0 = a[inCursor++] & 0xff;
result.Append(intToBase64[byte0 >> 2]);
//余数为1
if (numBytesInPartialGroup == 1)
{
result.Append(intToBase64[(byte0 << 4) & 0x3f]);
result.Append("==");
}
else
{
// 余数为2
int byte1 = a[inCursor++] & 0xff;
result.Append(intToBase64[(byte0 << 4) & 0x3f | (byte1 >> 4)]);
result.Append(intToBase64[(byte1 << 2) & 0x3f]);
result.Append('=');
}
}
return result.ToString();
} static readonly char[] intToBase64 = { 'A', 'B', 'C', 'D', 'E', 'F', /* 索引 0 ~ 5*/
'G', 'H', 'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P', 'Q', 'R', 'S', /* 索引6 ~ 18*/
'T', 'U', 'V', 'W', 'X', 'Y', 'Z', 'a', 'b', 'c', 'd', 'e', 'f', /* 索引 19 ~ 31*/
'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o', 'p', 'q', 'r', 's', /* 索引 32 ~ 44*/
't', 'u', 'v', 'w', 'x', 'y', 'z', '0', '1', '2', '3', '4', '5', /* 索引 45 ~ 57*/
'6', '7', '8', '9', '.'/*原先是字符+*/, '_'/*原先是字符/ */ }; /* 索引58 ~ 63*/ /**
* base64字符串还原为字符数组
* @param s base64字符串
* @return 还原后的字符串数组
* @throws Exception
*/
public static byte[] base64ToByteArray(String s)
{
//字符总长必须是4的倍数
int sLen = s.Length;
int numGroups = sLen / 4;
if (4 * numGroups != sLen)
throw new ArgumentException(
"字串长度必须是4的倍数");
//余1个byte则算漏了两个byte，余2个byte则算漏掉了1个byte
int missingBytesInLastGroup = 0;
int numFullGroups = numGroups;
if (sLen != 0)
{
//余2个byte的情况 if (s.charAt(sLen - 1) == '=')
{
missingBytesInLastGroup++;
//如果有余数发生，则完整3个byte组数少一个。
numFullGroups--;
}
//余1个byte的情况
if (s.charAt(sLen - 2) == '=')
missingBytesInLastGroup++;
} //总字节长度 byte[] result = new byte[3 * numGroups - missingBytesInLastGroup];
try
{
int inCursor = 0, outCursor = 0;
for (int i = 0; i < numFullGroups; i++)
{
int ch0 = base64toInt(s.charAt(inCursor++), base64ToInt);
int ch1 = base64toInt(s.charAt(inCursor++), base64ToInt);
int ch2 = base64toInt(s.charAt(inCursor++), base64ToInt);
int ch3 = base64toInt(s.charAt(inCursor++), base64ToInt);
result[outCursor++] = (byte)((ch0 << 2) | (ch1 >> 4));
result[outCursor++] = (byte)((ch1 << 4) | (ch2 >> 2));
result[outCursor++] = (byte)((ch2 << 6) | ch3);
}
if (missingBytesInLastGroup != 0)
{
int ch0 = base64toInt(s.charAt(inCursor++), base64ToInt);
int ch1 = base64toInt(s.charAt(inCursor++), base64ToInt);
//不管余1还是余2个byte，肯定要解码一个byte。
result[outCursor++] = (byte)((ch0 << 2) | (ch1 >> 4));
//如果余2个，即差一个才构成3byte，那么还要解码第二个byte。
if (missingBytesInLastGroup == 1)
{
int ch2 = base64toInt(s.charAt(inCursor++), base64ToInt);
result[outCursor++] = (byte)((ch1 << 4) | (ch2 >> 2));
}
}
}
catch (Exception e)
{
throw e;
}
return result;
} private static int base64toInt(char c, int[] alphaToInt)
{
int result = alphaToInt[c];
if (result < 0)
throw new Exception("illegal index!");//非法索引值
return result;
}
static readonly int[] base64ToInt = { 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, 1/*原先是62*/, 1, 1, 62/*原先是1*/, 1/*原先是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,
63/*原先是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 }; //static readonly byte[] base64ToInt = { -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, -1/*原先是62*/, -1, -1, 62/*原先是-1*/, -1/*原先是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,
// 63/*原先是-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 }; /**
* @param str原始中文字符串
* @param charset进行二进制字符串转化的字符编码
* @return 二进制字符串
*/
public static String encodeBuffer(String str)
{
if (str == null)
{
str = String.Empty;
}
try
{
return Base64Utils.byteArrayToBase64(Encoding.UTF8.GetBytes(str));
}
catch (Exception e)
{
return String.Empty;
}
} /**
* 此方法为还原中文字符串转化后的二进制字符串
* @param str 二进制字符串
* @param charset 字符编码
* @return 正常中文字符串
*/
public static String decodeBuffer(String str)
{
if (str == null)
{
return str = String.Empty;
}
try
{
byte[] byteStr;
try
{
byteStr = Base64Utils.base64ToByteArray(str.Trim());
}
catch (Exception e)
{
return String.Empty;
} return Encoding.UTF8.GetString(byteStr);
}
catch (Exception e)
{
return String.Empty;
}
} } }
3des加密，解密：
java版本：
package com.qhong; import java.security.Key; import javax.crypto.Cipher;
import javax.crypto.SecretKeyFactory;
import javax.crypto.spec.DESedeKeySpec;
import javax.crypto.spec.IvParameterSpec; /*import javax.crypto.Cipher;
import javax.crypto.SecretKeyFactory;
import javax.crypto.spec.DESedeKeySpec;
import javax.crypto.spec.IvParameterSpec;*/ import sun.misc.BASE64Decoder;
import sun.misc.BASE64Encoder; public class EncodeUtil {
public static void main(String[] args) throws Exception {
/* byte[] key=new BASE64Decoder().decodeBuffer("YWJjZGVmZ2hpamtsbW5vcHFyc3R1dnd4"); */
byte[] key=new BASE64Decoder().decodeBuffer("YWJjZGVmZ2hpamtsbW5vcHFyc3R1dnd4");
byte[] keyiv = { 1, 2, 3, 4, 5, 6, 7, 8 };
byte[] data="中国ABCabc123".getBytes("UTF-8");
System.out.println("ECB加密解密");
byte[] str3 = des3EncodeECB(key,data );
byte[] str4 = ees3DecodeECB(key, str3);
System.out.println(new BASE64Encoder().encode(str3));
System.out.println(new String(str4, "UTF-8"));
System.out.println();
System.out.println("CBC加密解密");
byte[] str5 = des3EncodeCBC(key, keyiv, data);
byte[] str6 = des3DecodeCBC(key, keyiv, str5);
System.out.println(new BASE64Encoder().encode(str5));
System.out.println(new String(str6, "UTF-8"));
}
/**
* ECB加密,不要IV
* @param key 密钥
* @param data 明文
* @return Base64编码的密文
* @throws Exception
*/
public static byte[] des3EncodeECB(byte[] key, byte[] data)
throws Exception {
Key deskey = null;
DESedeKeySpec spec = new DESedeKeySpec(key);
SecretKeyFactory keyfactory = SecretKeyFactory.getInstance("desede");
deskey = keyfactory.generateSecret(spec);
Cipher cipher = Cipher.getInstance("desede" + "/ECB/PKCS5Padding");
cipher.init(Cipher.ENCRYPT_MODE, deskey);
byte[] bOut = cipher.doFinal(data);
return bOut;
}
/**
* ECB解密,不要IV
* @param key 密钥
* @param data Base64编码的密文
* @return 明文
* @throws Exception
*/
public static byte[] ees3DecodeECB(byte[] key, byte[] data)
throws Exception {
Key deskey = null;
DESedeKeySpec spec = new DESedeKeySpec(key);
SecretKeyFactory keyfactory = SecretKeyFactory.getInstance("desede");
deskey = keyfactory.generateSecret(spec);
Cipher cipher = Cipher.getInstance("desede" + "/ECB/PKCS5Padding");
cipher.init(Cipher.DECRYPT_MODE, deskey);
byte[] bOut = cipher.doFinal(data);
return bOut;
}
/**
* CBC加密
* @param key 密钥
* @param keyiv IV
* @param data 明文
* @return Base64编码的密文
* @throws Exception
*/
public static byte[] des3EncodeCBC(byte[] key, byte[] keyiv, byte[] data)
throws Exception {
Key deskey = null;
DESedeKeySpec spec = new DESedeKeySpec(key);
SecretKeyFactory keyfactory = SecretKeyFactory.getInstance("desede");
deskey = keyfactory.generateSecret(spec);
Cipher cipher = Cipher.getInstance("desede" + "/CBC/PKCS5Padding");
IvParameterSpec ips = new IvParameterSpec(keyiv);
cipher.init(Cipher.ENCRYPT_MODE, deskey, ips);
byte[] bOut = cipher.doFinal(data);
return bOut;
}
/**
* CBC解密
* @param key 密钥
* @param keyiv IV
* @param data Base64编码的密文
* @return 明文
* @throws Exception
*/
public static byte[] des3DecodeCBC(byte[] key, byte[] keyiv, byte[] data)
throws Exception {
Key deskey = null;
DESedeKeySpec spec = new DESedeKeySpec(key);
SecretKeyFactory keyfactory = SecretKeyFactory.getInstance("desede");
deskey = keyfactory.generateSecret(spec);
Cipher cipher = Cipher.getInstance("desede" + "/CBC/PKCS5Padding");
IvParameterSpec ips = new IvParameterSpec(keyiv);
cipher.init(Cipher.DECRYPT_MODE, deskey, ips);
byte[] bOut = cipher.doFinal(data);
return bOut;
}
}
NET版本：（只有ECS）
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.IO;
using System.Threading.Tasks;
using System.Security.Cryptography; namespace Rongzi.ToolKits.Core.HBJR
{
public class EncodeUtil
{ /**
* ECB加密,不要IV
* @param key 密钥
* @param data 明文
* @return Base64编码的密文
* @throws Exception
*/
public static byte[] des3EncodeECB(byte[] key, byte[] data)
{
// Create a MemoryStream.
MemoryStream mStream = new MemoryStream();
TripleDESCryptoServiceProvider tdsp = new TripleDESCryptoServiceProvider();
tdsp.Mode = CipherMode.ECB;
tdsp.Padding = PaddingMode.PKCS7; // Create a CryptoStream using the MemoryStream
// and the passed key and initialization vector (IV).
CryptoStream cStream = new CryptoStream(mStream,
tdsp.CreateEncryptor(key, null),
CryptoStreamMode.Write);
// Write the byte array to the crypto stream and flush it.
cStream.Write(data, 0, data.Length);
cStream.FlushFinalBlock();
// Get an array of bytes from the
// MemoryStream that holds the
// encrypted data.
byte[] ret = mStream.ToArray();
// Close the streams.
cStream.Close();
mStream.Close();
// Return the encrypted buffer.
return ret; } /**
* ECB解密,不要IV
* @param key 密钥
* @param data Base64编码的密文
* @return 明文
* @throws Exception
*/
public static byte[] ees3DecodeECB(byte[] key, byte[] data)
{
try
{
// Create a new MemoryStream using the passed
// array of encrypted data.
MemoryStream msDecrypt = new MemoryStream(data);
TripleDESCryptoServiceProvider tdsp = new TripleDESCryptoServiceProvider();
tdsp.Mode = CipherMode.ECB;
tdsp.Padding = PaddingMode.PKCS7;
// Create a CryptoStream using the MemoryStream
// and the passed key and initialization vector (IV).
CryptoStream csDecrypt = new CryptoStream(msDecrypt,
tdsp.CreateDecryptor(key, null),
CryptoStreamMode.Read);
// Create buffer to hold the decrypted data.
byte[] fromEncrypt = new byte[data.Length];
// Read the decrypted data out of the crypto stream
// and place it into the temporary buffer.
csDecrypt.Read(fromEncrypt, 0, fromEncrypt.Length);
//Convert the buffer into a string and return it.
return fromEncrypt;
}
catch (CryptographicException e)
{
Console.WriteLine("A Cryptographic error occurred: {0}", e.Message);
return null;
}
} }
}
http://yilinliu.blogspot.hk/2010/07/c-java-net-descryptoserviceprovider-vs.html
http://www.cnblogs.com/liluping860122/p/4026015.html
http://www.cnblogs.com/AloneSword/archive/2013/12/11/3469219.html