如何使用 java 实现 Laravel中encrypt和decrypt，之前系统用的PHP，现在想换成java，希望能贴出有效代码

Question

如何使用 java 实现 Laravel中encrypt和decrypt，之前系统用的PHP，现在想换成java，希望能贴出有效代码谢谢

'cipher' => 'AES-256-CBC',

密文：eyJpdiI6ImdtbmJZZlwvZW81UEFvbm9aWE5RYU13PT0iLCJ2YWx1ZSI6IjZqS2xQQzBQYjdoRUlhRDVmemNuUHNTaFUxd0M1VHI1Ylg3MVcrUndWZDQ9IiwibWFjIjoiY2NjZmQ2MGFkYjAyMGU4MTQxYTlmZWY1ZjYyZjFmODI2ZmY1MDdlNTFkNWJmOWQ4OTAzNTAxNmUzNTg4ZjBjZSJ9

APP_KEY=base64:+90gHlNsoj6J0G9OepRfOkW/9IJHiK+bGS1Lt+wzn+M=

Answer 1

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Java 中实现 Laravel 中的加密和解密功能，您可以使用 Java Cryptography Extension (JCE) 提供的 API。下面是一个示例代码：

import javax.crypto.Cipher;
import javax.crypto.spec.IvParameterSpec;
import javax.crypto.spec.SecretKeySpec;
import java.util.Base64;

public class LaravelEncryption {
    private static final String CIPHER_ALGORITHM = "AES/CBC/PKCS5Padding";
    private static final String SECRET_KEY_ALGORITHM = "AES";
    private static final String KEY = "base64:+90gHlNsoj6J0G9OepRfOkW/9IJHiK+bGS1Lt+wzn+M=";
    private static final String IV = "0000000000000000";

    public static String encrypt(String plainText) throws Exception {
        byte[] keyBytes = Base64.getDecoder().decode(KEY.split(":")[1]);
        SecretKeySpec secretKey = new SecretKeySpec(keyBytes, SECRET_KEY_ALGORITHM);
        IvParameterSpec iv = new IvParameterSpec(IV.getBytes());
        Cipher cipher = Cipher.getInstance(CIPHER_ALGORITHM);
        cipher.init(Cipher.ENCRYPT_MODE, secretKey, iv);
        byte[] encryptedBytes = cipher.doFinal(plainText.getBytes());
        return Base64.getEncoder().encodeToString(encryptedBytes);
    }

    public static String decrypt(String cipherText) throws Exception {
        byte[] keyBytes = Base64.getDecoder().decode(KEY.split(":")[1]);
        SecretKeySpec secretKey = new SecretKeySpec(keyBytes, SECRET_KEY_ALGORITHM);
        IvParameterSpec iv = new IvParameterSpec(IV.getBytes());
        Cipher cipher = Cipher.getInstance(CIPHER_ALGORITHM);
        cipher.init(Cipher.DECRYPT_MODE, secretKey, iv);
        byte[] cipherBytes = Base64.getDecoder().decode(cipherText);
        byte[] decryptedBytes = cipher.doFinal(cipherBytes);
        return new String(decryptedBytes);
    }

    public static void main(String[] args) {
        String plainText = "hello, world!";
        try {
            String cipherText = encrypt(plainText);
            System.out.println("Cipher text: " + cipherText);
            String decryptedText = decrypt(cipherText);
            System.out.println("Decrypted text: " + decryptedText);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}