网页数据传输加密方法（前js+后java）

确保bcprov及codec的jar包存在路径汇总

import java.security.KeyPair;import java.security.KeyPairGenerator;import java.security.SecureRandom;import java.security.Security;import java.security.interfaces.RSAPrivateKey;import java.security.interfaces.RSAPublicKey;import java.util.Scanner;import javax.crypto.Cipher;import org.apache.commons.codec.binary.Base64;public class RSAUtils {    private static final KeyPair keyPair = initKey();    private static KeyPair initKey(){        try {            Security.addProvider(new org.bouncycastle.jce.provider.BouncyCastleProvider());            SecureRandom random = new SecureRandom();            KeyPairGenerator generator = KeyPairGenerator.getInstance("RSA", "BC");            generator.initialize(1024, random);            return generator.generateKeyPair();        }catch (Exception e) {            throw new RuntimeException(e);        }    }    /**     * 生成public key     * @return     */    public static String generateBase64PublicKey(){        RSAPublicKey key = (RSAPublicKey)keyPair.getPublic();        return new String(Base64.encodeBase64(key.getEncoded()));    }    /**     * 解密     * @param string     * @return     */    public static String decryptBase64(String string) {        return new String(decrypt(Base64.decodeBase64(string)));    }    private static byte[] decrypt(byte[] string) {        try {            Security.addProvider(new org.bouncycastle.jce.provider.BouncyCastleProvider());            Cipher cipher = Cipher.getInstance("RSA/None/PKCS1Padding", "BC");            RSAPrivateKey pbk = (RSAPrivateKey)keyPair.getPrivate();            cipher.init(Cipher.DECRYPT_MODE, pbk);            byte[] plainText = cipher.doFinal(string);            return plainText;        }catch (Exception e) {            throw new RuntimeException(e);        }    }    public static void main(String[] args) {        // 生成public key        System.out.println(generateBase64PublicKey());       /*        js端 加密过程       var publicKey = ""; //java产生的公钥       var encrypt = new JSEncrypt();       encrypt.setPublicKey(publicKey);       // 加密       alert(encrypt.encrypt("hello"));       */        // 解密        Scanner s=new Scanner(System.in);        String str=s.nextLine();        System.out.println(decryptBase64(str));    }}