AES加密JAVA实现

以下是Java实现AES加密的代码示例：

1. 导入相关包

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

2. 定义加密方法

public static String encrypt(String input, String key) throws Exception {
    byte[] inputBytes = input.getBytes("UTF-8");

    // 16字节密钥
    byte[] keyBytes = key.getBytes("UTF-8");
    SecretKeySpec keySpec = new SecretKeySpec(keyBytes, "AES");

    // ECB模式
    Cipher cipher = Cipher.getInstance("AES/ECB/PKCS5Padding");
    cipher.init(Cipher.ENCRYPT_MODE, keySpec);

    byte[] encrypted = cipher.doFinal(inputBytes);

    // 转换为Base64编码
    return Base64.getEncoder().encodeToString(encrypted);
}

3. 定义解密方法

public static String decrypt(String encryptedInput, String key) throws Exception {
    // 解码Base64
    byte[] encryptedBytes = Base64.getDecoder().decode(encryptedInput);

    // 16字节密钥
    byte[] keyBytes = key.getBytes("UTF-8");
    SecretKeySpec keySpec = new SecretKeySpec(keyBytes, "AES");

    // ECB模式
    Cipher cipher = Cipher.getInstance("AES/ECB/PKCS5Padding");
    cipher.init(Cipher.DECRYPT_MODE, keySpec);

    byte[] decrypted = cipher.doFinal(encryptedBytes);

    return new String(decrypted, "UTF-8");
}

4. 示例使用

public static void main(String[] args) throws Exception {
    String input = "Hello World";
    String key = "0123456789abcdef";

    // 加密
    String encrypted = encrypt(input, key);
    System.out.println("Encrypted: " + encrypted);

    // 解密
    String decrypted = decrypt(encrypted, key);
    System.out.println("Decrypted: " + decrypted);
}