JAVA实现AES加密

java实现AES加密，直接上代码：


import java.security.InvalidKeyException;
import java.security.NoSuchAlgorithmException;
import javax.crypto.BadPaddingException;
import javax.crypto.Cipher;
import javax.crypto.IllegalBlockSizeException;
import javax.crypto.KeyGenerator;
import javax.crypto.NoSuchPaddingException;
import javax.crypto.SecretKey;/**
*这个示例程序展示了如何用Java实现AES加密和解密。请注意
*密钥和加密的文本是不可读的二进制文件，因此在下面的程序中，我们
*以基础字节的十六进制格式显示。
*/
public class AESEncryption {private static final char[] HEX_ARRAY = "0123456789ABCDEF".toCharArray();/*** 1. Generate a plain text for encryption 2. Get a secret key (printed in hexadecimal form). In actual use this must by encrypted and kept safe. The same key is required for decryption.*/public static void main(String[] args) throws Exception {String plainText = "Hello World";SecretKey secKey = getSecretEncryptionKey();byte[] cipherText = encryptText(plainText, secKey);String decryptedText = decryptText(cipherText, secKey);System.out.println("Original Text:" + plainText);System.out.println("AES Key (Hex Form):" + bytesToHex(secKey.getEncoded()));System.out.println("Encrypted Text (Hex Form):" + bytesToHex(cipherText));System.out.println("Descrypted Text:" + decryptedText);}/*** gets the AES encryption key. In your actual programs, this should be safely stored.** @return secKey (Secret key that we encrypt using it)* @throws NoSuchAlgorithmException (from KeyGenrator)*/public static SecretKey getSecretEncryptionKey() throws NoSuchAlgorithmException {KeyGenerator aesKeyGenerator = KeyGenerator.getInstance("AES");aesKeyGenerator.init(128); // The AES key size in number of bitsSecretKey secKey = aesKeyGenerator.generateKey();return secKey;}/*** Encrypts plainText in AES using the secret key** @param plainText* @param secKey* @return byteCipherText (The encrypted text)* @throws NoSuchPaddingException (from Cipher)* @throws NoSuchAlgorithmException (from Cipher)* @throws InvalidKeyException (from Cipher)* @throws BadPaddingException (from Cipher)* @throws IllegalBlockSizeException (from Cipher)*/public static byte[] encryptText(String plainText, SecretKey secKey)throws NoSuchAlgorithmException, NoSuchPaddingException, InvalidKeyException,IllegalBlockSizeException, BadPaddingException {// AES defaults to AES/ECB/PKCS5Padding in Java 7Cipher aesCipher = Cipher.getInstance("AES");aesCipher.init(Cipher.ENCRYPT_MODE, secKey);byte[] byteCipherText = aesCipher.doFinal(plainText.getBytes());return byteCipherText;}/*** Decrypts encrypted byte array using the key used for encryption.** @param byteCipherText* @param secKey* @return plainText* @throws NoSuchPaddingException* @throws NoSuchAlgorithmException* @throws InvalidKeyException* @throws BadPaddingException* @throws IllegalBlockSizeException*/public static String decryptText(byte[] byteCipherText, SecretKey secKey)throws NoSuchAlgorithmException, NoSuchPaddingException, InvalidKeyException,IllegalBlockSizeException, BadPaddingException {// AES defaults to AES/ECB/PKCS5Padding in Java 7Cipher aesCipher = Cipher.getInstance("AES");aesCipher.init(Cipher.DECRYPT_MODE, secKey);byte[] bytePlainText = aesCipher.doFinal(byteCipherText);return new String(bytePlainText);}/*** Convert a binary byte array into readable hex form Old library is deprecated on OpenJdk 11 and** @param hash (in binary)* @return hexHash*/public static String bytesToHex(byte[] bytes) {char[] hexChars = new char[bytes.length * 2];for (int j = 0; j < bytes.length; j++) {int v = bytes[j] & 0xFF;hexChars[j * 2] = HEX_ARRAY[v >>> 4];hexChars[j * 2 + 1] = HEX_ARRAY[v & 0x0F];}return new String(hexChars);}
}

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JAVA实现AES加密

JAVA实现AES加密

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