md5解密异常

javax.crypto.BadPaddingException: Given final block not properly padded
    at com.sun.crypto.provider.CipherCore.doFinal(CipherCore.java:811)
    at com.sun.crypto.provider.CipherCore.doFinal(CipherCore.java:676)
    at com.sun.crypto.provider.PBECipherCore.doFinal(PBECipherCore.java:422)
    at com.sun.crypto.provider.PBEWithMD5AndDESCipher.engineDoFinal(PBEWithMD5AndDESCipher.java:316)
    at javax.crypto.Cipher.doFinal(Cipher.java:2131)

此异常为：填充异常。需要考虑解密对象与解密方法是否一致，比如是否加盐