import org.apache.commons.codec.binary.Base64; import javax.crypto.Cipher; import javax.crypto.spec.IvParameterSpec; import javax.crypto.spec.SecretKeySpec; 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 = "1234567890123456"; private static String IV = "1234567890123456"; /** * 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"NoPadding PkcsPadding 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 new Base64().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) 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); byte[] original = cipher.doFinal(encrypted1); String originalString = new String(original); 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) throws Exception { return desEncrypt(data, KEY, IV); } /** * 测试 */ public static void main(String args[]) throws Exception { String test1 = "sa"; String test = new String(test1.getBytes(), "UTF-8"); String data = null; String key = KEY; String iv = IV; // /g2wzfqvMOeazgtsUVbq1kmJawROa6mcRAzwG1/GeJ4= data = encrypt(test, key, iv); System.out.println("数据:" + test); System.out.println("加密:" + data); String jiemi = desEncrypt(data, key, iv).trim(); System.out.println("解密:" + jiemi); } }