//1初始化秘钥
			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私钥加密，公钥解密——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私钥加密，公钥解密——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));