maven 引入一个依赖

<!-- https://mvnrepository.com/artifact/commons-codec/commons-codec --> <dependency> <groupId>commons-codec</groupId> <artifactId>commons-codec</artifactId> <version>1.11</version> </dependency>

一、Java AES 加密解密工具类

import java.util.Random; import java.util.UUID; import javax.crypto.Cipher; import javax.crypto.spec.IvParameterSpec; import javax.crypto.spec.SecretKeySpec; import org.apache.commons.codec.binary.Base64; / * AES 128bit 加密解密工具类 */ public class AesEncryptUtil { //使用AES-128-CBC加密模式，key需要为16位,key和iv可以相同！ / * 加密方法 * @param data 要加密的数据 * @param key 加密key * @param iv 加密iv * @return 加密的结果 * @throws Exception */ public static String encrypt(String data, String key, String iv) throws Exception { try { Cipher cipher = Cipher.getInstance("AES/CBC/NoPadding");//"算法/模式/补码方式" int blockSize = cipher.getBlockSize(); byte[] dataBytes = data.getBytes(); int plaintextLength = dataBytes.length; if (plaintextLength % blockSize != 0) { plaintextLength = plaintextLength + (blockSize - (plaintextLength % blockSize)); } byte[] plaintext = new byte[plaintextLength]; System.arraycopy(dataBytes, 0, plaintext, 0, dataBytes.length); SecretKeySpec keyspec = new SecretKeySpec(key.getBytes(), "AES"); IvParameterSpec ivspec = new IvParameterSpec(iv.getBytes()); cipher.init(Cipher.ENCRYPT_MODE, keyspec, ivspec); byte[] encrypted = cipher.doFinal(plaintext); // 加密 return new Base64().encodeToString(encrypted); //通过Base64转码返回 } catch (Exception e) { e.printStackTrace(); return null; } } / * 解密方法 * @param data 要解密的数据 * @param key 解密key * @param iv 解密iv * @return 解密的结果 * @throws Exception */ public static String desEncrypt(String data, String key, String iv) throws Exception { try { byte[] encrypted1 = new Base64().decode(data); Cipher cipher = Cipher.getInstance("AES/CBC/NoPadding"); SecretKeySpec keyspec = new SecretKeySpec(key.getBytes(), "AES"); IvParameterSpec ivspec = new IvParameterSpec(iv.getBytes()); cipher.init(Cipher.DECRYPT_MODE, keyspec, ivspec); //使用密钥初始化，设置为解密模式 byte[] original = cipher.doFinal(encrypted1); //执行操作 String originalString = new String(original); return originalString; } catch (Exception e) { e.printStackTrace(); return null; } } / * 用于生成一组16位随机数 key * @return */ public static String getRandomStringKey() { int hashCodeValue = UUID.randomUUID().hashCode(); if(hashCodeValue < 0) hashCodeValue = -hashCodeValue; return String.format("%016d",hashCodeValue);//左边补0,16位，进制（d,x） } / * 用于生成16位的随机数 iv * @return */ public static String getRandomStringIv(){ String base = "abcdefghijklmnopqrstuvwxyz0"; Random random=new Random(); StringBuffer key = new StringBuffer(); for(int i=0;i<16;i++){ int keyNumber = random.nextInt(base.length()); key.append(base.charAt(keyNumber)); } return key.toString(); } / * 测试 */ public static void main(String args[]) throws Exception { String data = "admin123"; String key = getRandomStringKey(); String iv = getRandomStringIv(); String enData = encrypt(data, key, iv); System.out.println(key); System.out.println(iv); System.out.println(enData); System.out.println(desEncrypt(enData, key, iv)); } }