Java how to implement the RSA encryption and decryption of PEM format-CodePudding

The idea is:
1, first with.net generate XML format of public key and secret key

///& lt; Summary> 
///generate XML format in a given path of private and public keys, 
///& lt;/summary> 
Public void GenerateKeys (string path) 
{
Using (var rsa=new RSACryptoServiceProvider (RsaKeySize)) 
{
Try 
{
//access to private and public keys, 
Var publicKey=rsa. ToXmlString (false); 
Var privateKey=rsa. ToXmlString (true); 

//save to disk 
File. WriteAllText (Path.Com bine (path, publicKeyFileName), publicKey); 
File. WriteAllText (Path.Com bine (path, privateKeyFileName), privateKey); 

MessageBox. Show (the string. Format (" generation of RSA key path: {0} \ \ [{1}, {2}] ", path, publicKeyFileName, privateKeyFileName)); 
} 
The finally 
{
Rsa. PersistKeyInCsp=false; 
} 
} 
}

2, the XML with BouncyCastle of public key and the key switch to PEM format

///& lt; Summary> 
///RSA private key format conversion,. Net - & gt; Java 
///& lt;/summary> 
///& lt; Param name="privateKey & gt;" The.net generated private key & lt;/param> 
///& lt; Returns>  
Public static string RSAPrivateKeyDotNet2Java (string privateKey) 
{
XmlDocument doc=new XmlDocument (); 
Doc. LoadXml (privateKey); 
BigInteger m=new BigInteger (1, Convert FromBase64String (doc. DocumentElement. GetElementsByTagName (" Modulus ") [0]. The InnerText)); 
BigInteger exp=new BigInteger (1, Convert FromBase64String (doc. DocumentElement. GetElementsByTagName (" Exponent ") [0]. The InnerText)); 
BigInteger d=new BigInteger (1, Convert FromBase64String (doc. DocumentElement. GetElementsByTagName (" d ") [0]. The InnerText)); 
BigInteger p=new BigInteger (1, Convert FromBase64String (doc. DocumentElement. GetElementsByTagName (" p ") [0]. The InnerText)); 
BigInteger q=new BigInteger (1, Convert FromBase64String (doc. DocumentElement. GetElementsByTagName (" q ") [0]. The InnerText)); 
BigInteger dp=new BigInteger (1, Convert FromBase64String (doc. DocumentElement. GetElementsByTagName (" dp ") [0]. The InnerText)); 
BigInteger dq=new BigInteger (1, Convert FromBase64String (doc. DocumentElement. GetElementsByTagName (" dq ") [0]. The InnerText)); 
BigInteger qinv=new BigInteger (1, Convert FromBase64String (doc. DocumentElement. GetElementsByTagName (" InverseQ ") [0]. The InnerText)); 

Exp RsaPrivateCrtKeyParameters privateKeyParam=new RsaPrivateCrtKeyParameters (m, d, p, q, dp, dq, qinv); 

PrivateKeyInfo PrivateKeyInfo=PrivateKeyInfoFactory. CreatePrivateKeyInfo (privateKeyParam); 
Byte [] serializedPrivateBytes=privateKeyInfo. ToAsn1Object () GetEncoded (); 
Return the Convert. ToBase64String (serializedPrivateBytes); 
} 

///& lt; Summary> 
///RSA public key format conversion, the.net - & gt; Java 
///& lt;/summary> 
///& lt; Param name="publicKey & gt;" The.net the generated public key & lt;/param> 
///& lt; Returns>  
Public static string RSAPublicKeyDotNet2Java (string publicKey) 
{
XmlDocument doc=new XmlDocument (); 
Doc. LoadXml (publicKey); 
BigInteger m=new BigInteger (1, Convert FromBase64String (doc. DocumentElement. GetElementsByTagName (" Modulus ") [0]. The InnerText)); 
BigInteger p=new BigInteger (1, Convert FromBase64String (doc. DocumentElement. GetElementsByTagName (" Exponent ") [0]. The InnerText)); 
RsaKeyParameters pub=new RsaKeyParameters (false, m, p); 

SubjectPublicKeyInfo publicKeyInfo=SubjectPublicKeyInfoFactory. CreateSubjectPublicKeyInfo (pub); 
Byte [] serializedPublicBytes=publicKeyInfo. ToAsn1Object () GetDerEncoded (); 
Return the Convert. ToBase64String (serializedPublicBytes); 
}

3, then the Java on how to take advantage of me into PEM format public key for encryption and decryption, make with. NET?