//1初始化秘鑰
			KeyPairGenerator?keyPairGenerator?=?KeyPairGenerator.getInstance("RSA");
			keyPairGenerator.initialize(2048);
			KeyPair?keyPair?=?keyPairGenerator.generateKeyPair();
			RSAPublicKey?rsaPublicKey?=?(RSAPublicKey)?keyPair.getPublic();
			RSAPrivateKey?rsaPrivateKey?=?(RSAPrivateKey)?keyPair.getPrivate();
			System.out.println("PublicKey:"+Base64.encodeBase64(rsaPublicKey.getEncoded()));
			System.out.println("PrivateKey:"+Base64.encodeBase64(rsaPrivateKey.getEncoded()));
			
			//2私鑰加密，公鑰解密——加密
			PKCS8EncodedKeySpec?pkcs8EncodedKeySpec?=?new?PKCS8EncodedKeySpec(rsaPrivateKey.getEncoded());
			KeyFactory?keyFactory?=?KeyFactory.getInstance("RSA");
			PrivateKey?privateKey?=?keyFactory.generatePrivate(pkcs8EncodedKeySpec);
			Cipher?cipher?=?Cipher.getInstance("RSA");
			cipher.init(Cipher.ENCRYPT_MODE,?privateKey);
			byte[]?result?=?cipher.doFinal(s.getBytes());//待加密的字符串
			System.out.println("加密密文："+Base64.encodeBase64(result));
			
			//2私鑰加密，公鑰解密——解密
			X509EncodedKeySpec?x509EncodedKeySpec?=?new?X509EncodedKeySpec(rsaPublicKey.getEncoded());
			KeyFactory?keyFactory1?=?KeyFactory.getInstance("RSA");
			PublicKey?publicKey?=?keyFactory1.generatePublic(x509EncodedKeySpec);
			Cipher?cipher1?=?Cipher.getInstance("RSA");
			cipher1.init(Cipher.DECRYPT_MODE,?publicKey);
			result?=?cipher.doFinal(result);
			System.out.println("解密密文："+new?String(result));