Spring数据库连接等配置加密

package junfeng.util; import java.security.Key; import javax.crypto.Cipher; import javax.crypto.SecretKey; import javax.crypto.SecretKeyFactory; import javax.crypto.spec.PBEKeySpec; import javax.crypto.spec.PBEParameterSpec; /** * 配置文件加解密工具 * * @author 张俊峰 * @time 2018年7月15日 下午10:56:36 */ public class ConfigCryptoUtil { // 这个密码需要修改为自己的密码 private final static String PASSWORD = "password"; // 加密算法 private final static String ALGORITHM = "PBEWithMD5AndDES"; // 盐 private final static byte[] SALT = "63293188".getBytes(); // 迭代次数 private final static int INTERATION_COUNT = 1000; private static Key getPBEKey() { SecretKeyFactory keyFactory; SecretKey key = null; PBEKeySpec keySpec = new PBEKeySpec(PASSWORD.toCharArray()); try { keyFactory = SecretKeyFactory.getInstance(ALGORITHM); key = keyFactory.generateSecret(keySpec); } catch (Exception e) { e.printStackTrace(); } return key; } /** * 加密 * * @param encText * 要加密文本 * @return */ public static String encrypt(String encText) { Key key = getPBEKey(); byte[] encTextByte = null; PBEParameterSpec parameterSpec = new PBEParameterSpec(SALT, INTERATION_COUNT); try { Cipher cipher = Cipher.getInstance(ALGORITHM); cipher.init(Cipher.ENCRYPT_MODE, key, parameterSpec); encTextByte = cipher.doFinal(encText.getBytes()); } catch (Exception e) { } return bytesToHexString(encTextByte); } /** * 解密 * * @param decText * 要解密文本 * @return */ public static String decrypt(String decText) { Key key = getPBEKey(); byte[] decTextByte = null; PBEParameterSpec parameterSpec = new PBEParameterSpec(SALT, INTERATION_COUNT); try { Cipher cipher = Cipher.getInstance(ALGORITHM); cipher.init(Cipher.DECRYPT_MODE, key, parameterSpec); decTextByte = cipher.doFinal(hexStringToBytes(decText)); } catch (Exception e) { } return new String(decTextByte); } // 以下代码百度 public static String bytesToHexString(byte[] src) { StringBuilder stringBuilder = new StringBuilder(); if (src == null || src.length <= 0) { return null; } for (int i = 0; i < src.length; i++) { int v = src[i] & 0xFF; String hv = Integer.toHexString(v); if (hv.length() < 2) { stringBuilder.append(0); } stringBuilder.append(hv); } return stringBuilder.toString(); } // 以下代码百度 public static byte[] hexStringToBytes(String hexString) { if (hexString == null || hexString.equals("")) { return null; } hexString = hexString.toUpperCase(); int length = hexString.length() / 2; char[] hexChars = hexString.toCharArray(); byte[] d = new byte[length]; for (int i = 0; i < length; i++) { int pos = i * 2; d[i] = (byte) (charToByte(hexChars[pos]) << 4 | charToByte(hexChars[pos + 1])); } return d; } // 以下代码百度 private static byte charToByte(char c) { return (byte) "0123456789ABCDEF".indexOf(c); } public static void main(String[] args) { String encText = "我要加密啦！"; String decText = encrypt(encText); System.out.println("密文：" + decText); String org = decrypt(decText); System.out.println("明文：" + org); } }