小编Siv*_*mar的帖子

我有公钥字符串

String publicK = "-----BEGIN PUBLIC KEY-----\n" +
    "MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAgFhTDtuYJ5G5LEHMesnf\n" +
    "wX9cXZ1b/ozkkpbgtC3ziETiFkOFncbPCskpdbPmXxXv3vrwJ2RQIL2LZLZPe1xT\n" +
    "AyQY1DdD8hGqIemMwV2NqfFoEomVL5+QOAKCRiHkGgte6a2+OoTk9JzRP/NVaPkB\n" +
    "sdX1/nIPERYen3uDvUSYq83Ite2oDyaZZxj+/r46SadS/g5jWmeqgVoInJw813y7\n" +
    "Ee2HgYVbnktlLNhqIGj+1OKmwop+GP7Kk5CAkt9fo4VjRRllDaX1yFCZEbDL254n\n" +
    "S+LVOhl4mLBM8764+YVxjyYRC1Nq2rNZfQ602652i+l8u8nGqdiKOKDpjNDvhONP\n" +
    "yQIDAQAB\n" +
    "-----END PUBLIC KEY-----";

我想转换 PublicKey Object 。

byte[] byteKey = publicK.getBytes();
X509EncodedKeySpec spec = new X509EncodedKeySpec(byteKey);
KeyFactory kf = KeyFactory.getInstance("RSA");
return kf.generatePublic(spec);

以上代码抛出异常

java.security.InvalidKeyException: invalid key format
at sun.security.x509.X509Key.decode(X509Key.java:387)
at sun.security.x509.X509Key.decode(X509Key.java:403)
at sun.security.rsa.RSAPublicKeyImpl.<init>(RSAPublicKeyImpl.java:84)
at sun.security.rsa.RSAKeyFactory.generatePublic(RSAKeyFactory.java:298)
at sun.security.rsa.RSAKeyFactory.engineGeneratePublic(RSAKeyFactory.java:201)

我有一个接口和抽象类。

public class TEST extends Abstract implements Inter2{
    void print() {
        toDO();
    }

    public static void main(String[] args) {
        new TEST().toDO();
    }
}

abstract class Abstract {

    public void toDO() {
        System.out.println("Abstract is called");
    }
}

interface Inter2 {

    default void toDO() {
        System.out.println("Inter2 is called");
    }
}

我想强制类接口默认方法而不是抽象类。

我是 C# 新手。我不明白为什么它会产生问题。

            CspParameters cspParams = new CspParameters(24);
            cspParams.KeyContainerName = "XML_DISG_RSA_KEY";
            RSACryptoServiceProvider key = new RSACryptoServiceProvider(cspParams);

下面的代码在我的本地设置中运行良好。但它在客户端不起作用。

他们得到了以下例外。

[CryptographicException：密钥在指定状态下使用无效。]

   System.Security.Cryptography.Utils.CreateProvHandle(CspParameters parameters, Boolean randomKeyContainer) +4644432
   System.Security.Cryptography.Utils.GetKeyPairHelper(CspAlgorithmType keyType, CspParameters parameters, Boolean randomKeyContainer, Int32 dwKeySize, SafeProvHandle& safeProvHandle, SafeKeyHandle& safeKeyHandle) +69
   System.Security.Cryptography.RSACryptoServiceProvider.GetKeyPair() +92
   System.Security.Cryptography.RSACryptoServiceProvider..ctor(Int32 dwKeySize, CspParameters parameters, Boolean useDefaultKeySize) +173
   System.Security.Cryptography.RSACryptoServiceProvider..ctor(CspParameters parameters) +14

请你帮助我好吗。

public interface ABC {
        public boolean removeUser(String userId) throws OTPServiceException, RemoteException;
}

ABC abc= mock(ABC.class);
doNothing().when(abc).removeUser(anyString());

我试过这样的.我得到了以下异常.

org.mockito.exceptions.base.MockitoException: 
Only void methods can doNothing()!
Example of correct use of doNothing():
    doNothing().
    doThrow(new RuntimeException())
    .when(mock).someVoidMethod();
Above means:
someVoidMethod() does nothing the 1st time but throws an exception the 2nd time is called