java加密工具类，可设置对应的加解密key

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！ private static String KEY ="whshenke20180606"; private static String IV ="whshenke20180606"; /** * 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("UTF-8"), "AES"); IvParameterSpec ivspec = new IvParameterSpec(iv.getBytes()); cipher.init(Cipher.ENCRYPT_MODE, keyspec, ivspec); byte[] encrypted = cipher.doFinal(plaintext); return Base64Util.encode(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 whshenke20180606 */ public static String desEncrypt(String data, String key, String iv) { try { byte[] encrypted1 = Base64Util.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); byte[] original = cipher.doFinal(encrypted1); String originalString = new String(original, "UTF-8"); return originalString; } catch (Exception e) { //e.printStackTrace(); return null; } } /** * 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){ return desEncrypt(data, KEY, IV); } /** * 测试 */ public static void main(String args[]) throws Exception { //KNnAbiCvFxispeG+wS01jA== //KNnAbiCvFxispeG+wS01jA== //KNnAbiCvFxispeG+wS01jA== String test = "测试"; String data = null; String key = "dufy20170329java"; String iv = "dufy20170329java"; // data = encrypt(test, key, iv); //KNnAbiCvFxispeG+wS01jA==  System.out.println(data); System.out.println(desEncrypt("8XguKV2aprVwg4UqEie7f9gkr7xDaSKrGZZD7x1J3uISWkvQAtpq8hpkskwi V+8bJmRcmQWIZ4sRom37GB7w7O4AH+HjH5ixViJ7k6bx+oEFVWSmIqKEj4e5 lMcyXgcXpTB8IGnt1WKS2p7Qnn+cjA==", key, iv)); } }