用NODE RSA JS 加密解密正常，用JAVA RSAUtils工具类加密解密正常。但是用node加密玩的java解密不了。原因：node默认的是
DEFAULT_ENCRYPTION_SCHEME = 'pkcs1_oaep' 而java中默认的是pkcs1。
node-rsa源码：https://github.com/rzcoder/node-rsa/blob/ea5c17d9351c857c0594d7921c596ff5636882f1/src/NodeRSA.js
var DEFAULT_ENCRYPTION_SCHEME = 'pkcs1_oaep';
node-rsa官方文档：https://www.npmjs.com/package/node-rsa
Options
You can specify some options by second/third constructor argument, or over key.setOptions()method.
- environment — working environment (default autodetect):
'browser'— will run pure js implementation of RSA algorithms.'node'fornodejs >= 0.10.x or io.js >= 1.x— provide some native methods like sign/verify and encrypt/decrypt.
- encryptionScheme — padding scheme for encrypt/decrypt. Can be
'pkcs1_oaep'or'pkcs1'. Default'pkcs1_oaep'. - signingScheme — scheme used for signing and verifying. Can be
'pkcs1'or'pss'or 'scheme-hash' format string (eg'pss-sha1'). Default'pkcs1-sha256', or, if chosen pss:'pss-sha1'.
Notice: This lib supporting next hash algorithms:
'md5','ripemd160','sha1','sha256','sha512'in browser and node environment and additional'md4','sha','sha224','sha384'in node only.
所以要保持一致：
import NodeRSA from 'node-rsa';const rsa_encrypt = (data) => { let key = new NodeRSA('-----BEGIN PUBLIC KEY-----\n' + 'MIGfMA0。。。。。。。AQAB\n' + '-----END PUBLIC KEY-----'); // key.generateKeyPair(1024); key.setOptions({encryptionScheme: 'pkcs1'}) let encryptKey = key.encrypt(data, 'base64') return encryptKey;} 后台：
public static byte[] decryptByPrivateKey(byte[] encryptedData, String privateKey) throws Exception { byte[] keyBytes = Base64Utils.decode(privateKey); PKCS8EncodedKeySpec pkcs8KeySpec = new PKCS8EncodedKeySpec(keyBytes); KeyFactory keyFactory = KeyFactory.getInstance(KEY_ALGORITHM); Key privateK = keyFactory.generatePrivate(pkcs8KeySpec); Cipher cipher = Cipher.getInstance(keyFactory.getAlgorithm()); cipher.init(Cipher.DECRYPT_MODE, privateK); int inputLen = encryptedData.length; ByteArrayOutputStream out = new ByteArrayOutputStream(); int offSet = 0; byte[] cache; int i = 0; // 对数据分段解密 while (inputLen - offSet > 0) { if (inputLen - offSet > MAX_DECRYPT_BLOCK) { cache = cipher.doFinal(encryptedData, offSet, MAX_DECRYPT_BLOCK); } else { cache = cipher.doFinal(encryptedData, offSet, inputLen - offSet); } out.write(cache, 0, cache.length); i++; offSet = i * MAX_DECRYPT_BLOCK; } byte[] decryptedData = out.toByteArray(); out.close(); return decryptedData; } 参考：https://blog.csdn.net/mshootingstar/article/details/56496719