java前后端通讯AES加密及解密样例

package org.johney.demo.util; import java.util.Base64; import javax.crypto.Cipher; import javax.crypto.spec.IvParameterSpec; import javax.crypto.spec.SecretKeySpec; /** * Title: AESUtil.java Description: AES加解密工具类 Copyright: Copyright (c) 2018 * Company: XFSD haoMeiJia * * @author Johney * @date 2018年6月5日 * @version 1.0 */ public class AESUtil { //使用AES-128-CBC加密模式，key需要为16位,key和iv可以相同！ private static String KEY = "1234567890000000"; private static String IV = "1234567890000000"; /** * 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){ 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); return Base64.getEncoder().encodeToString(encrypted); } 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){ Base64.Decoder decoder = Base64.getDecoder(); byte[] encrypted1 = decoder.decode(data); try { 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); byte[] original = cipher.doFinal(encrypted1); StringBuffer sb = new StringBuffer(); String originalString = new String(original,"UTF-8"); for (int i = 0; i < originalString.length(); i++) { if(originalString.charAt(i)!=0) { sb.append(originalString.charAt(i)); } } String originalString1 = String.valueOf(sb); return originalString1; } catch (Exception e) { throw new RuntimeException(e.getMessage()); } } /** * 使用默认的key和iv加密 * @param data * @return * @throws Exception */ public static String encrypt(String data) throws Exception { return encrypt(data, KEY, IV); } /** * 使用默认的key和iv解密 * @param data * @return * @throws Exception */ public static String desEncrypt(String data) throws Exception { return desEncrypt(data, KEY, IV); } public static String byteToHexString(byte[] bytes) { StringBuffer sb = new StringBuffer(bytes.length); String sTemp; for (int i = 0; i < bytes.length; i++) { sTemp = Integer.toHexString(0xFF & bytes[i]); if (sTemp.length() < 2) sb.append(0); sb.append(sTemp.toUpperCase()); } return sb.toString(); } public static boolean ifBASE64(String val) { try { Base64.Decoder decoder = Base64.getDecoder(); Base64.Encoder encoder = Base64.getEncoder(); byte[] key= decoder.decode(val); String result= encoder.encodeToString(key); if(result.equals(val)){ return true; } } catch (Exception e) { return false; } return false; } public static void main(String[] args) { String mes="测试用例：*&……%"; String codeAfter=encrypt(mes,KEY,IV); String decodeMes=desEncrypt(codeAfter, KEY, IV); System.out.println("原始数据："+mes); System.out.println("加密后数据："+codeAfter); System.out.println("解密数据："+decodeMes); } }