package com.lock.demo.service; import org.apache.tomcat.util.codec.binary.Base64; import javax.crypto.Cipher; import javax.crypto.SecretKey; import javax.crypto.SecretKeyFactory; import javax.crypto.spec.DESKeySpec; /** * @author niunafei * @function * des 对称性算法加密 解密工具类 可逆性算法 * @email [email protected] * @date 2018/12/12 下午2:05 */ public class DesUtils { private static final String DES="DES"; /** * 公钥 8位以上 */ private static final String SECRET_KEY="12345678"; /** * 获取秘钥对象 * @return * @throws Exception */ private static final SecretKey getSecretKeyFactory() throws Exception { SecretKeyFactory des = SecretKeyFactory.getInstance(DES); SecretKey secretKey = des.generateSecret(new DESKeySpec(SECRET_KEY.getBytes())); return secretKey; } /** * 加密 * @param param * @return * @throws Exception */ public static final String encryption(String param) throws Exception { Cipher cipher = Cipher.getInstance(DES); SecretKey secretKey = getSecretKeyFactory(); cipher.init(Cipher.ENCRYPT_MODE, secretKey); return new String(Base64.encodeBase64(cipher.doFinal(param.toString().getBytes()))); } /** * 解密 * @param value * @return * @throws Exception */ public static final String decrypt(String value) throws Exception { Cipher cipher = Cipher.getInstance(DES); SecretKey secretKey = getSecretKeyFactory(); cipher.init(Cipher.DECRYPT_MODE, secretKey); return new String(cipher.doFinal(Base64.decodeBase64(value.getBytes()))); } /** 测试 */ public static void main(String[] args) throws Exception { String key="123"; System.out.println(" key="+key); //输出 key=123 String value=DesUtils.encryption(key); System.out.println("encryption value="+value); //输出 encryption value=LDiFUdf0iew= System.out.println("decrypt key="+DesUtils.decrypt(value)); //输出 decrypt key=123 } }
比较简单无脑~~~~~