PrivateKey privateKey = (RSAPrivateKey) keyPair.getPrivate();

　　String publicKeyString = getKeyString(publicKey);

　　System.out.println("public:\n" + publicKeyString);

　　String privateKeyString = getKeyString(privateKey);

　　System.out.println("private:\n" + privateKeyString);

　　//加解密类

　　Cipher cipher = Cipher.getInstance("RSA");//Cipher.getInstance("RSA/ECB/PKCS1Padding");

　　//明文

　　byte[] plainText = "我们都很好！邮件：@sina.com".getBytes();

　　//加密

　　cipher.init(Cipher.ENCRYPT_MODE, publicKey);

　　byte[] enBytes = cipher.doFinal(plainText);

　　//通过密钥字符串得到密钥

　　publicKey = getPublicKey(publicKeyString);

　　privateKey = getPrivateKey(privateKeyString);

　　//解密

　　cipher.init(Cipher.DECRYPT_MODE, privateKey);

　　byte[]deBytes = cipher.doFinal(enBytes);

　　publicKeyString = getKeyString(publicKey);

　　System.out.println("public:\n" +publicKeyString);

　　privateKeyString = getKeyString(privateKey);

　　System.out.println("private:\n" + privateKeyString);

　　String s = new String(deBytes);

　　System.out.println(s);

　　}

　　}