rsa加密解密示例，含分段加解密及后端代码

package cn.bywin.bydata.common.base.util; import cn.hutool.crypto.SecureUtil; import cn.hutool.crypto.asymmetric.KeyType; import cn.hutool.crypto.asymmetric.RSA; import java.security.KeyPair; import java.security.PrivateKey; import java.security.PublicKey; import java.util.Base64; import java.util.HashMap; import java.util.Map; /** * @author: zhanbf * @Date: 2023/6/19 16:54 */ public class RSAUtils { /** * 类型 */ public static final String ENCRYPT_TYPE = "RSA"; /** * 获取公钥的key */ public static final String PUBLIC_KEY = "MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAq26+9uPB47gaGM9cXibc29HZFfDUadJJcXobUqexpYXuOO7EhXMsG4MvO3uqewuS/cNZdBE6arrkWKLwzyCweneqSzzJTkRKJr5WezGNNMftPoZ1QMgv/9OOlO/TinoUL4PtRKmLi/ZCJDLfgcbBJOf6OkciD4DwDjSe/7Rv+W159mGgwq9kFpS1BS7AGyPUVNdQWpRhJFrEBsr3A+MVHuGWOHUouvs2xGcdRdiX31/+PKZub9d9G4cnQz+rS1MGn/M56mknogjqykjZqKrFH9Ahamj3Kv14gIRmufhRdyenB/8HsB8ZopC6Nt+VeVbUmNeTRO1Ea/3vwMCa892v9wIDAQAB"; /** * 获取私钥的key */ public static final String PRIVATE_KEY = "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"; /** * 生成秘钥对 */ public static Map<String, String> generateKeyPair() { try { KeyPair pair = SecureUtil.generateKeyPair(ENCRYPT_TYPE); PrivateKey privateKey = pair.getPrivate(); PublicKey publicKey = pair.getPublic(); // 获取 公钥和私钥 的 编码格式（通过该 编码格式 可以反过来 生成公钥和私钥对象） byte[] pubEncBytes = publicKey.getEncoded(); byte[] priEncBytes = privateKey.getEncoded(); // 把 公钥和私钥 的 编码格式 转换为 Base64文本 方便保存 String pubEncBase64 = Base64.getEncoder().encodeToString(pubEncBytes); String priEncBase64 = Base64.getEncoder().encodeToString(priEncBytes); Map<String, String> map = new HashMap<String, String>(2); map.put("PUBLIC_KEY", pubEncBase64); map.put("PRIVATE_KEY", priEncBase64); return map; } catch (Exception e) { throw new RuntimeException("生成密钥对失败:"+ExceptionUtil.getExceptionMessage(e)); } } /** * 公钥加密 * * @param content 要加密的内容 * @param publicKey 公钥 */ public static String encrypt(String content, String publicKey) { try { RSA rsa = new RSA(null, publicKey); return rsa.encryptBase64(content, KeyType.PublicKey); } catch (Exception e) { throw new RuntimeException("加密失败:"+ExceptionUtil.getExceptionMessage(e)); } } /** * 私钥解密 * * @param content 要解密的内容 * @param privateKey 私钥 */ public static String decrypt(String content, String privateKey) { try { RSA rsa = new RSA(privateKey, null); return rsa.decryptStr(content, KeyType.PrivateKey); } catch (Exception e) { throw new RuntimeException("解密失败:"+ExceptionUtil.getExceptionMessage(e)); } } public static void main(String[] args) { // Map<String, String> keyMap = generateKeyPair(); // String PUBLIC_KEY = keyMap.get("PUBLIC_KEY"); // String PRIVATE_KEY = keyMap.get("PRIVATE_KEY"); System.out.println("公钥："+PUBLIC_KEY); System.out.println("私钥："+PRIVATE_KEY); String content = "Bywin@123"; System.out.println("原始数据："+content); String encrypt = RSAUtils.encrypt(content, PUBLIC_KEY); System.out.println("加密："+encrypt); String decrypt = RSAUtils.decrypt(encrypt, PRIVATE_KEY); System.out.println("解密："+decrypt); } }