DES加密算法

来源：互联网发布：数组字符串转换 js 编辑：程序博客网时间：2024/05/22 16:45
DES加密算法
public class SymmetricalEncryptionDemo {
public static void main(String[] args) throws Exception {    //要加密的内容    String content = "今晚6点 505 嘿嘿嘿！";    byte[] bytes = content.getBytes();    //对称AES或者DES算法。    SecretKey secretKey = (SecretKey)     //加密    String encryptData = encrypt(content, secretKey);    System.out.println(encryptData);    //解密    String decryptData = decrypt(encryptData, secretKey);    System.out.println(decryptData);}/** * 生成 * @return * @throws NoSuchAlgorithmException */private static SecretKey createKey() throws NoSuchAlgorithmException {    //生成秘钥    KeyGenerator generator = KeyGenerator.getInstance("DES");//得到了key生成者    SecretKey secretKey = generator.generateKey();    return secretKey;}/** * 解密方法 * @param encryptData * @param secretKey * @return */public static String decrypt(String encryptData,SecretKey secretKey)throws Exception{    byte[] bytes = Base64.getDecoder().decode(encryptData);    //得到cipher单例对象    Cipher cipher = Cipher.getInstance("DES");    //解密    //初始化，指定模式为解密模式，并传入秘钥    cipher.init(Cipher.DECRYPT_MODE, secretKey);    byte[] decryptBytes = cipher.doFinal(bytes);    return new String(decryptBytes);}/** * 加密方法 * @param content * @param secretKey * @return */public static String encrypt(String content,SecretKey secretKey)throws Exception{    byte[] bytes = content.getBytes();    //得到cipher单例对象    Cipher cipher = Cipher.getInstance("DES");    //初始化cipher    cipher.init(Cipher.ENCRYPT_MODE, secretKey);    //正式加密    //得到加密后的字节数组    byte[] encryptBytes = cipher.doFinal(bytes);    return Base64.getEncoder().encodeToString(encryptBytes);}
}
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