本篇文章为大家展示了java中怎么实现RSA非对称加密算法，内容简明扼要并且容易理解，绝对能使你眼前一亮，通过这篇文章的详细介绍希望你能有所收获。
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1、私钥加密，公钥解密：
//私钥加密，公钥解密--加密 PKCS8EncodedKeySpec pkcs8EncodedKeySpec = new PKCS8EncodedKeySpec(rsaprivateKey.getEncoded()); KeyFactory privateKeyFactory = KeyFactory.getInstance("RSA"); PrivateKey privateKey = privateKeyFactory.generatePrivate(pkcs8EncodedKeySpec); Cipher privateCipher = Cipher.getInstance("RSA"); privateCipher.init(Cipher.ENCRYPT_MODE, privateKey); byte[] result = privateCipher.doFinal(src.getBytes()); System.out.println("私钥加密，公钥解密--加密:"+Base64.encodeBase64String(result)); //私钥加密，公钥解密--解密 X509EncodedKeySpec x509EncodedKeySpec = new X509EncodedKeySpec(rsapublicKey.getEncoded()); KeyFactory publicKeyFactory = KeyFactory.getInstance("RSA"); PublicKey publicKey = publicKeyFactory.generatePublic(x509EncodedKeySpec); Cipher publicCipher = Cipher.getInstance("RSA"); publicCipher.init(Cipher.DECRYPT_MODE, publicKey); result = publicCipher.doFinal(result); System.out.println("私钥加密，公钥解密--解密:"+new String(result));
2、公钥加密，私钥解密：
//公钥加密，私钥解密---加密 x509EncodedKeySpec = new X509EncodedKeySpec(rsapublicKey.getEncoded()); publicKeyFactory = KeyFactory.getInstance("RSA"); publicKey = publicKeyFactory.generatePublic(x509EncodedKeySpec); publicCipher = Cipher.getInstance("RSA"); publicCipher.init(Cipher.ENCRYPT_MODE, publicKey); result = publicCipher.doFinal(src.getBytes()); System.out.println("公钥加密，私钥解密---加密:"+Base64.encodeBase64String(result)); //公钥加密，私钥解密---解密 pkcs8EncodedKeySpec = new PKCS8EncodedKeySpec(rsaprivateKey.getEncoded()); privateKeyFactory = KeyFactory.getInstance("RSA"); privateKey = privateKeyFactory.generatePrivate(pkcs8EncodedKeySpec); privateCipher = Cipher.getInstance("RSA"); privateCipher.init(Cipher.DECRYPT_MODE, privateKey); result = privateCipher.doFinal(result); System.out.println("公钥加密，私钥解密---解密:"+new String(result));
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