/** * 加密 * * @param content 需要加密的内容 * @param password 加密密码 * @return */ public static String encrypt(String content, String password) { try { KeyGenerator kgen = KeyGenerator.getInstance("AES"); /** * SecureRandom 实现尝试完全随机化生成器本身的内部状态， * 除非调用方在调用 getInstance 方法之后又调用了setSeed 方法 */ SecureRandom random=SecureRandom.getInstance("SHA1PRNG"); random.setSeed(password.getBytes()); kgen.init(128,random); SecretKey secretKey = kgen.generateKey(); byte[] enCodeFormat = secretKey.getEncoded(); SecretKeySpec key = new SecretKeySpec(enCodeFormat, "AES"); Cipher cipher = Cipher.getInstance("AES");// 创建密码器 byte[] byteContent = content.getBytes("utf-8"); cipher.init(Cipher.ENCRYPT_MODE, key);// 初始化 byte[] result = cipher.doFinal(byteContent); //二进制转换为16 StringBuffer sb = new StringBuffer(); for (int i = 0; i < result.length; i++) { String hex = Integer.toHexString(result[i] & 0xFF); if (hex.length() == 1) { hex = '0' + hex; } sb.append(hex.toUpperCase()); } return sb.toString(); // 加密 } catch (NoSuchAlgorithmException e) { e.printStackTrace(); } catch (NoSuchPaddingException e) { e.printStackTrace(); } catch (InvalidKeyException e) { e.printStackTrace(); } catch (UnsupportedEncodingException e) { e.printStackTrace(); } catch (IllegalBlockSizeException e) { e.printStackTrace(); } catch (BadPaddingException e) { e.printStackTrace(); } return null; } /**解密 * @param content 待解密内容 * @param password 解密密钥 * @return */ public static byte[] decrypt(String content, String password) { try { //转换为2禁止 if(content==null) return null; if (content.length() < 1) return null; byte[] con = new byte[content.length()/2]; for (int i = 0;i< content.length()/2; i++) { int high = Integer.parseInt(content.substring(i*2, i*2+1), 16); int low = Integer.parseInt(content.substring(i*2+1, i*2+2), 16); con[i] = (byte) (high * 16 + low); } KeyGenerator kgen = KeyGenerator.getInstance("AES"); SecureRandom random=SecureRandom.getInstance("SHA1PRNG"); random.setSeed(password.getBytes()); kgen.init(128, random); SecretKey secretKey = kgen.generateKey(); byte[] enCodeFormat = secretKey.getEncoded(); SecretKeySpec key = new SecretKeySpec(enCodeFormat, "AES"); Cipher cipher = Cipher.getInstance("AES");// 创建密码器 cipher.init(Cipher.DECRYPT_MODE, key);// 初始化 byte[] result = cipher.doFinal(con); return result; // 加密 } catch (NoSuchAlgorithmException e) { e.printStackTrace(); } catch (NoSuchPaddingException e) { e.printStackTrace(); } catch (InvalidKeyException e) { e.printStackTrace(); } catch (IllegalBlockSizeException e) { e.printStackTrace(); } catch (BadPaddingException e) { e.printStackTrace(); } return null; }