Java ASE encryption (set encryption mode, encryption vector)

The Java ASE encryption code is as follows

import org.apache.commons.codec.binary.Base64;

import javax.crypto.Cipher;
import javax.crypto.KeyGenerator;
import javax.crypto.spec.IvParameterSpec;
import javax.crypto.spec.SecretKeySpec;
import java.nio.charset.StandardCharsets;


/** * Aes encryption tool class **@author chengh
 * @date2021/07/14 * /
public class AesEncryptUtils {

    /** * Indicates the algorithm name, encryption mode, and data filling mode */
    private static final String ALGORITHMS = "AES/CBC/PKCS5Padding";

    /** * Initialize the vector (adjust the value of the vector as required, or add the vector to the input variables) */
    private static final byte[] SIV = new byte[16];

    /** * Encryption **@paramContent Encrypted string *@param* the encryptKey key values@returnEncrypted content *@throwsThe Exception Exception * /
    public static String encrypt(String content, String encryptKey) throws Exception {
        KeyGenerator.getInstance("AES").init(128);
        Cipher cipher = Cipher.getInstance(ALGORITHMS);
        // Encryption vector
        IvParameterSpec iv = new IvParameterSpec(SIV);
        cipher.init(Cipher.ENCRYPT_MODE, new SecretKeySpec(encryptKey.getBytes(), "AES"), iv);
        byte[] b = cipher.doFinal(content.getBytes(StandardCharsets.UTF_8));
        // Use base64 algorithm for transcoding to avoid Chinese garbled characters
        return Base64.encodeBase64String(b);
    }

    /** * Decrypt **@paramEncryptStr The string * to decrypt@paramDecryptKey Specifies the key value * that is decrypted@returnDecrypted content *@throwsThe Exception Exception * /
    public static String decrypt(String encryptStr, String decryptKey) throws Exception {
        KeyGenerator.getInstance("AES").init(128);
        Cipher cipher = Cipher.getInstance(ALGORITHMS);
        // Encryption vector
        IvParameterSpec iv = new IvParameterSpec(SIV);
        cipher.init(Cipher.DECRYPT_MODE, new SecretKeySpec(decryptKey.getBytes(), "AES"), iv);
        // Use base64 algorithm for transcoding to avoid Chinese garbled characters
        byte[] encryptBytes = Base64.decodeBase64(encryptStr);
        byte[] decryptBytes = cipher.doFinal(encryptBytes);
        return newString(decryptBytes); }}Copy the code