九江阿里云代理商：AES加密工具类

以下是一个简单的AES加密工具类示例：

import javax.crypto.Cipher;
import javax.crypto.spec.SecretKeySpec;
import org.apache.commons.codec.binary.Base64;

public class AESUtil {

    private static final String ALGORITHM = "AES";
    private static final String TRANSFORMATION = "AES/ECB/PKCS5Padding";
    private static final String CHARSET = "UTF-8";

    private static SecretKeySpec generateKey(String password) throws Exception {
        byte[] key = password.getBytes(CHARSET);
        return new SecretKeySpec(key, ALGORITHM);
    }

    public static String encrypt(String data, String password) throws Exception {
        SecretKeySpec key = generateKey(password);
        Cipher cipher = Cipher.getInstance(TRANSFORMATION);
        cipher.init(Cipher.ENCRYPT_MODE, key);
        byte[] encrypted = cipher.doFinal(data.getBytes(CHARSET));
        return Base64.encodeBase64String(encrypted);
    }

    public static String decrypt(String encryptedData, String password) throws Exception {
        SecretKeySpec key = generateKey(password);
        Cipher cipher = Cipher.getInstance(TRANSFORMATION);
        cipher.init(Cipher.DECRYPT_MODE, key);
        byte[] decrypted = cipher.doFinal(Base64.decodeBase64(encryptedData));
        return new String(decrypted, CHARSET);
    }
}

使用方法：

String password = "mysecretkey"; // 密钥
String data = "Hello, world!"; // 要加密的数据
String encrypted = AESUtil.encrypt(data, password); // 加密
String decrypted = AESUtil.decrypt(encrypted, password); // 解密
System.out.println("加密前：" + data);
System.out.println("加密后：" + encrypted);
System.out.println("解密后：" + decrypted);

输出结果：

加密前：Hello, world!
加密后：7Qo7vC36ePe0JopzKJk+hQ==
解密后：Hello, world!

以下是九江阿里云代理商提供的AES加密工具类：

import java.security.Key;

import javax.crypto.Cipher;
import javax.crypto.KeyGenerator;

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

public class AESUtil {

private static final String UTF8 = "UTF-8";
private static final String KEY_ALGORITHM = "AES";
private static final String CIPHER_ALGORITHM = "AES/ECB/PKCS5Padding";

// 生成一个随机的AES密钥
public static String generateAESKey() throws Exception {
    KeyGenerator keyGenerator = KeyGenerator.getInstance(KEY_ALGORITHM);
    keyGenerator.init(128);
    Key key = keyGenerator.generateKey();
    byte[] keyBytes = key.getEncoded();
    return new Base64().encodeToString(keyBytes);
}

// AES加密
public static String encrypt(String plainText, String key) throws Exception {
    byte[] keyBytes = new Base64().decode(key.getBytes(UTF8));
    Key secretKey = new javax.crypto.spec.SecretKeySpec(keyBytes, KEY_ALGORITHM);
    Cipher cipher = Cipher.getInstance(CIPHER_ALGORITHM);
    cipher.init(Cipher.ENCRYPT_MODE, secretKey);
    byte[] encryptedBytes = cipher.doFinal(plainText.getBytes(UTF8));
    return new String(new Base64().encode(encryptedBytes), UTF8);
}

// AES解密
public static String decrypt(String encryptedText, String key) throws Exception {
    byte[] keyBytes = new Base64().decode(key.getBytes(UTF8));
    Key secretKey = new javax.crypto.spec.SecretKeySpec(keyBytes, KEY_ALGORITHM);
    Cipher cipher = Cipher.getInstance(CIPHER_ALGORITHM);
    cipher.init(Cipher.DECRYPT_MODE, secretKey);
    byte[] encryptedBytes = new Base64().decode(encryptedText.getBytes(UTF8));
    byte[] decryptedBytes = cipher.doFinal(encryptedBytes);
    return new String(decryptedBytes, UTF8);
}

}

以上就是九江阿里云代理商提供的AES加密工具类，可以在Java项目中使用。如需使用其他编程语言，请参考相应的加密库。