一个加密解密算法。

package ss;

import javax.crypto.Cipher;
import javax.crypto.spec.IvParameterSpec;
import javax.crypto.spec.SecretKeySpec;

import sun.misc.BASE64Decoder;
import sun.misc.BASE64Encoder;
/**
*
* @author Jason
*  AES 加密算法
*  对dataSource文件中的用户名进行加密解密
*
*/
public class DESedeCoder {
public static final String key = "1q2w3e4r";
/**
* 加密算法
* @param strKey
* @param strIn
* @return
* @throws Exception
*/
public static String encrypt(String strKey, String strIn) throws Exception {
SecretKeySpec skeySpec = getKey(strKey);
Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
IvParameterSpec iv = new IvParameterSpec("0102030405060708".getBytes());
cipher.init(Cipher.ENCRYPT_MODE, skeySpec, iv);
byte[] encrypted = cipher.doFinal(strIn.getBytes());

return new BASE64Encoder().encode(encrypted);
}
/**
* aes解密
* @param strKey
* @param strIn
* @return
* @throws Exception
*/
public static String decrypt(String strKey, String strIn) throws Exception {
SecretKeySpec skeySpec = getKey(strKey);
Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
IvParameterSpec iv = new IvParameterSpec("0102030405060708".getBytes());
cipher.init(Cipher.DECRYPT_MODE, skeySpec, iv);
byte[] encrypted1 = new BASE64Decoder().decodeBuffer(strIn);
byte[] original = cipher.doFinal(encrypted1);
String originalString = new String(original);
return originalString;
}

private static SecretKeySpec getKey(String strKey) throws Exception {
byte[] arrBTmp = strKey.getBytes();
byte[] arrB = new byte[16]; // 创建一个空的16位字节数组（默认值为0）

for (int i = 0; i < arrBTmp.length && i < arrB.length; i++) {
arrB[i] = arrBTmp[i];
}

SecretKeySpec skeySpec = new SecretKeySpec(arrB, "AES");

return skeySpec;
}
}

package ss;

public class Test {
public static void main(String[] args) throws Exception {
String Code = "gbpc";
//String key = "1q2w3e4r";
String codE;
codE = DESedeCoder.encrypt(DESedeCoder.key, Code);
System.out.println("原文：" + Code);
System.out.println("密钥：" + DESedeCoder.key);
System.out.println("密文：" + codE);
System.out.println("解密：" + DESedeCoder.decrypt(DESedeCoder.key, codE));
}
}

package ss;

import javax.crypto.Cipher;
import javax.crypto.spec.IvParameterSpec;
import javax.crypto.spec.SecretKeySpec;

import sun.misc.BASE64Decoder;

public class Encryption {
public static void main(String args[]) throws Exception {
System.out.println(encrypt("Test String", "1234567812345678",
"1234567812345678"));
System.out.println(desEncrypt("R6SqeVDCjhoEs80Xd1awEQ=="));
}

public static String encrypt(String data, String key, String iv)
throws Exception {
try {
data = "Test String";
key = "1234567812345678";
iv = "1234567812345678";
Cipher cipher = Cipher.getInstance("AES/CBC/NoPadding");
int blockSize = cipher.getBlockSize();

byte[] dataBytes = data.getBytes();
int plaintextLength = dataBytes.length;
if (plaintextLength % blockSize != 0) {
plaintextLength = plaintextLength
+ (blockSize - (plaintextLength % blockSize));
}

byte[] plaintext = new byte[plaintextLength];
System.arraycopy(dataBytes, 0, plaintext, 0, dataBytes.length);

SecretKeySpec keyspec = new SecretKeySpec(key.getBytes(), "AES");
IvParameterSpec ivspec = new IvParameterSpec(iv.getBytes());

cipher.init(Cipher.ENCRYPT_MODE, keyspec, ivspec);
byte[] encrypted = cipher.doFinal(plaintext);

return new sun.misc.BASE64Encoder().encode(encrypted);

} catch (Exception e) {
e.printStackTrace();
return null;
}
}

public static String desEncrypt(String data) throws Exception {
try {
//data = "2fbwW9+8vPId2/foafZ
3ff0
q6Q==";
String key = "1234567812345678";
String iv = "1234567812345678";

byte[] encrypted1 = new BASE64Decoder().decodeBuffer(data);

Cipher cipher = Cipher.getInstance("AES/CBC/NoPadding");
SecretKeySpec keyspec = new SecretKeySpec(key.getBytes(), "AES");
IvParameterSpec ivspec = new IvParameterSpec(iv.getBytes());

cipher.init(Cipher.DECRYPT_MODE, keyspec, ivspec);

byte[] original = cipher.doFinal(encrypted1);
String originalString = new String(original);
return originalString;
} catch (Exception e) {
e.printStackTrace();
return null;
}
}
}