使用 Java 生成 RSA 公钥、私钥

直接上代码，如下：

import org.apache.commons.codec.binary.Base64;
import java.security.KeyPair;
import java.security.KeyPairGenerator;
import java.security.NoSuchAlgorithmException;

/**
 * 加密工具
 * @author huangxin 2020/1/2
 */
public class EncryptTool {

    class KeyBean {
        /** 私钥 */
        private String privateKey;
        /** 公钥 */
        private String publicKey;

        public String getPrivateKey() {
            return privateKey;
        }

        public void setPrivateKey(String privateKey) {
            this.privateKey = privateKey;
        }

        public String getPublicKey() {
            return publicKey;
        }

        public void setPublicKey(String publicKey) {
            this.publicKey = publicKey;
        }
    }

    /**
     * 生成RSA公、私钥对
     * @return
     * @throws NoSuchAlgorithmException
     */
    public KeyBean generateRSAKeyPairs() throws NoSuchAlgorithmException {
        KeyPairGenerator generator = KeyPairGenerator.getInstance("RSA");
        generator.initialize(1024);
        KeyPair keyPair = generator.genKeyPair();

        KeyBean keyBean = new KeyBean();
        keyBean.setPrivateKey(Base64.encodeBase64String(keyPair.getPrivate().getEncoded()));
        keyBean.setPublicKey(Base64.encodeBase64String(keyPair.getPublic().getEncoded()));
        return keyBean;
    }

    public static void main(String[] args) throws Exception {
        EncryptTool demo = new EncryptTool();
        KeyBean keyBean = demo.generateRSAKeyPairs();
        System.out.println("公钥：" + keyBean.getPublicKey());
        System.out.println("私钥：" + keyBean.getPrivateKey());
    }

}

运行示例，输出如下：

公钥：MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQCuOFMwnouXWEueTm2Qmua5oo8J7frN96DoSDtw11ObrfvfVKu91GcjPlF/ynUeyjwPuzmi+bkCIDs2wUn0wz3CU52o4e1drzLiDOhGGqAb+cj5//o9mUVRJGrfzZyEePW8/gaRK3Q1iqu8hkBXbWGIkGFsbc3DJdkWlkd+Y6fHGwIDAQAB
私钥：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