spring-jdbc文件数据库配置加密

package com.eeds.util; import java.security.Security; import javax.crypto.Cipher; import javax.crypto.SecretKey; import javax.crypto.spec.SecretKeySpec; /** * * @author victor * */ public class Des { private static final String Algorithm = "DES"; //定义 加密算法,可用 DES,DESede,Blowfish //src为被加密的数据缓冲区（源） public static byte[] encryptMode(byte[] keybyte, byte[] src) { try { //生成密钥 SecretKey deskey = new SecretKeySpec(keybyte, Algorithm); //加密 Cipher c1 = Cipher.getInstance(Algorithm); c1.init(Cipher.ENCRYPT_MODE, deskey); return c1.doFinal(src); } catch (java.security.NoSuchAlgorithmException e1) { e1.printStackTrace(); } catch (javax.crypto.NoSuchPaddingException e2) { e2.printStackTrace(); } catch (java.lang.Exception e3) { e3.printStackTrace(); } return null; } //keybyte为加密密钥，长度为24字节 //src为加密后的缓冲区 public static byte[] decryptMode(byte[] keybyte, byte[] src) { try { //生成密钥 SecretKey deskey = new SecretKeySpec(keybyte, Algorithm); //解密 Cipher c1 = Cipher.getInstance(Algorithm); c1.init(Cipher.DECRYPT_MODE, deskey); return c1.doFinal(src); } catch (java.security.NoSuchAlgorithmException e1) { e1.printStackTrace(); } catch (javax.crypto.NoSuchPaddingException e2) { e2.printStackTrace(); } catch (java.lang.Exception e3) { e3.printStackTrace(); } return null; } //转换成十六进制字符串 public static String byte2hex(byte[] b) { String hs=""; String stmp=""; for (int n=0;n<b.length;n++) { stmp=(java.lang.Integer.toHexString(b[n] & 0XFF)); if (stmp.length()==1) hs=hs+"0"+stmp; else hs=hs+stmp; if (n<b.length-1) hs=hs+""; } return hs.toUpperCase(); } //16 进制 转 2 进制 public static byte[] hex2byte(String hex) throws IllegalArgumentException { if (hex.length() % 2 != 0) { throw new IllegalArgumentException(); } char[] arr = hex.toCharArray(); byte[] b = new byte[hex.length() / 2]; for (int i = 0, j = 0, l = hex.length(); i < l; i++, j++) { String swap = "" + arr[i++] + arr[i]; int byteint = Integer.parseInt(swap, 16) & 0xFF; b[j] = new Integer(byteint).byteValue(); } return b; } private static byte[] hex2byte(byte[] b) { if ((b.length % 2) != 0) throw new IllegalArgumentException("长度不是偶数"); byte[] b2 = new byte[b.length / 2]; for (int n = 0; n < b.length; n += 2) { String item = new String(b, n, 2); b2[n / 2] = (byte) Integer.parseInt(item, 16); } return b2; } //加密 public static String Encrypt(String str, byte[] key){ Security.addProvider(new com.sun.crypto.provider.SunJCE()); byte[] encrypt = encryptMode(key, str.getBytes()); return byte2hex(encrypt); } //加密 public static byte[] EncryptRetByte(byte[] src, byte[] key){ Security.addProvider(new com.sun.crypto.provider.SunJCE()); byte[] encrypt = encryptMode(key, src); return encrypt; } //解密 public static String Decrypt(String str, byte[] key){ Security.addProvider(new com.sun.crypto.provider.SunJCE()); byte[] decrypt = decryptMode(key, hex2byte(str)); return new String(decrypt); } public static void main(String arg[]){ String str = ""; String strKey = "0002000200020002"; String s3 = Encrypt(str, hex2byte(strKey)); String s4 = Decrypt(s3, hex2byte(strKey)); System.out.println(s3); System.out.println(s4); } }