生成RSA密钥对并将私有编码为字符串

输出为十六进制字符串

import java.security.*;public class Test {    public static void main(String[] args) throws NoSuchAlgorithmException, NoSuchProviderException {        KeyPairGenerator keyGen = KeyPairGenerator.getInstance("RSA");        keyGen.initialize(512);        byte[] publicKey = keyGen.genKeyPair().getPublic().getEnpred();        StringBuffer retString = new StringBuffer();        for (int i = 0; i < publicKey.length; ++i) { retString.append(Integer.toHexString(0x0100 + (publicKey[i] & 0x00FF)).substring(1));        }        System.out.println(retString);    }}

输出为字节值

import java.security.*;public class Test {    public static void main(String[] args) throws NoSuchAlgorithmException, NoSuchProviderException {        KeyPairGenerator keyGen = KeyPairGenerator.getInstance("RSA");        keyGen.initialize(512);        byte[] publicKey = keyGen.genKeyPair().getPublic().getEnpred();        StringBuffer retString = new StringBuffer();        retString.append("[");        for (int i = 0; i < publicKey.length; ++i) { retString.append(publicKey[i]); retString.append(", ");        }        retString = retString.delete(retString.length()-2,retString.length());        retString.append("]");        System.out.println(retString); //e.g. [48, 92, 48, .... , 0, 1]    }}