秘钥key的长度只能是16/24/32个字符。否则会报错：Key length not 128/192/256 bits.

pom.xml 引入

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<!-- AES加密解密 PKCS7Padding-->
<dependency>
	<groupId>org.bouncycastle</groupId>
	<artifactId>bcprov-jdk15</artifactId>
	<version>1.44</version>
</dependency>

AES加密

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/**
 * AES加密
 * AES/ECB/PKCS7Padding
 */
public static String encrypt(String input, String key)  throws Exception {

    SecretKeySpec skey = new SecretKeySpec(key.getBytes(), "AES");
    Cipher cipher = Cipher.getInstance("AES/ECB/PKCS7Padding");
    cipher.init(Cipher.ENCRYPT_MODE, skey);
    byte[] crypted = cipher.doFinal(input.getBytes());

    return new String(Base64.encodeBase64(crypted));
}

AES解密

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/**
 * AES解密
 * AES/ECB/PKCS7Padding
 */
public static String decrypt(String input, String key) throws Exception {

    SecretKeySpec skey = new SecretKeySpec(key.getBytes(), "AES");
    Cipher cipher = Cipher.getInstance("AES/ECB/PKCS7Padding");
    cipher.init(Cipher.DECRYPT_MODE, skey);
    byte[] output = cipher.doFinal(Base64.decodeBase64(input));

    return new String(output);
}