AES 加密和解密工具类

import java.security.NoSuchAlgorithmException;import java.security.SecureRandom;import java.util.logging.Level;import java.util.logging.Logger;import javax.crypto.Cipher;import javax.crypto.KeyGenerator;import javax.crypto.SecretKey;import javax.crypto.spec.SecretKeySpec;import org.apache.commons.codec.binary.Base64;/** * @version V1.0 * @desc AES 加密工具类 */public class AESUtils {    private static final String KEY_ALGORITHM = "AES";    private static final String DEFAULT_CIPHER_ALGORITHM = "AES/ECB/PKCS5Padding";//默认的加密算法    private static final String PASSWORD_KEY = "123456";//解密秘钥    /**     * AES 加密操作     *     * @param content 待加密内容     * @param password 加密密码     * @return 返回Base64转码后的加密数据     */    public static String encrypt(String content) {        try {            Cipher cipher = Cipher.getInstance(DEFAULT_CIPHER_ALGORITHM);// 创建密码器            byte[] byteContent = content.getBytes("utf-8");            cipher.init(Cipher.ENCRYPT_MODE, getSecretKey(PASSWORD_KEY));// 初始化为加密模式的密码器            byte[] result = cipher.doFinal(byteContent);// 加密            return Base64.encodeBase64String(result);//通过Base64转码返回        } catch (Exception ex) {            Logger.getLogger(AESUtils.class.getName()).log(Level.SEVERE, null, ex);        }        return null;    }    /**     * AES 解密操作     *     * @param content     * @param password     * @return     */    public static String decrypt(String content) {        try {            //实例化            Cipher cipher = Cipher.getInstance(DEFAULT_CIPHER_ALGORITHM);            //使用密钥初始化，设置为解密模式            cipher.init(Cipher.DECRYPT_MODE, getSecretKey(PASSWORD_KEY));            //执行操作            byte[] result = cipher.doFinal(Base64.decodeBase64(content));            return new String(result, "utf-8");        } catch (Exception ex) {            Logger.getLogger(AESUtils.class.getName()).log(Level.SEVERE, null, ex);        }        return null;    }    /**     * 生成加密秘钥     *     * @return     */    private static SecretKeySpec getSecretKey(final String password) {        //返回生成指定算法密钥生成器的 KeyGenerator 对象        KeyGenerator kg = null;        try {            kg = KeyGenerator.getInstance(KEY_ALGORITHM);            SecureRandom secureRandom = SecureRandom.getInstance("SHA1PRNG" );             secureRandom.setSeed(password.getBytes());             //AES 要求密钥长度为 128            kg.init(128, secureRandom);            //生成一个密钥            SecretKey secretKey = kg.generateKey();            return new SecretKeySpec(secretKey.getEncoded(), KEY_ALGORITHM);// 转换为AES专用密钥        } catch (NoSuchAlgorithmException ex) {            Logger.getLogger(AESUtils.class.getName()).log(Level.SEVERE, null, ex);        }        return null;    }    public static void main(String[] args) {        String s = "oFWN75fxFHQ";        System.out.println("s:" + s);        String s1 = AESUtils.encrypt(s);        System.out.println("s1:" + s1);              System.out.println("s2:"+AESUtils.decrypt(s1));            }}