是这样，最近有一个关于秒杀的项目，为了防止一些用户，利用时间信息，刷接口，所以需要对时间进行加密之后传输，当然只是加密是不行的，需要有对应的解密，不然，自己也无法获取时间信息，话不多说，上代码。
public class DESUtils {
public final static String KEY = "weqeqwasd21ewsdfsdfa";
public static String encrypt(String data, String key) {
String encryptedData = null;
try {
// 随机数源
SecureRandom sr = new SecureRandom();
DESKeySpec deskey = new DESKeySpec(key.getBytes());
// 创建一个密匙工厂，然后用它把DESKeySpec转换成一个SecretKey对象
SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("DES");
SecretKey secretKey = keyFactory.generateSecret(deskey);
// 加密对象
Cipher cipher = Cipher.getInstance("DES");
cipher.init(Cipher.ENCRYPT_MODE, secretKey, sr);
// 加密，并把字节数组编码成字符串
encryptedData = new sun.misc.base64Encoder().encode(cipher.doFinal(data.getBytes()));
} catch (Exception e) {
throw new RuntimeException("加密错误，错误信息：", e);
}
return encryptedData;
}
protected static String decrypt(String cryptData,String key) {
String decryptedData = null;
try {
// 随机数源
SecureRandom sr = new SecureRandom();
DESKeySpec deskey = new DESKeySpec(key.getBytes());
// 创建一个密匙工厂，然后用它把DESKeySpec转换成一个SecretKey对象
SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("DES");
SecretKey secretKey = keyFactory.generateSecret(deskey);
// 解密对象
Cipher cipher = Cipher.getInstance("DES");
cipher.init(Cipher.DECRYPT_MODE, secretKey, sr);
// 把字符串解码为字节数组并解密
decryptedData = new String(cipher.doFinal(new sun.misc.base64Decoder().decodeBuffer(cryptData)));
} catch (Exception e) {
throw new RuntimeException("解密错误，错误信息：", e);
}
return decryptedData;
}
}
