- package com.gxtuan.util;
- import java.security.NoSuchAlgorithmException;
- import javax.crypto.Cipher;
- import javax.crypto.NoSuchPaddingException;
- import javax.crypto.spec.IvParameterSpec;
- import javax.crypto.spec.SecretKeySpec;
- public class JiaMi {
- private String iv = "feie91o96t2q2p0p";
- private IvParameterSpec ivspec;
- private SecretKeySpec keyspec;
- private Cipher cipher;
- private String SecretKey = "8d0bfe2fb0311fd7";
- public JiaMi()
- {
- ivspec = new IvParameterSpec(iv.getBytes());
- keyspec = new SecretKeySpec(SecretKey.getBytes(), "AES");
- try {
- cipher = Cipher.getInstance("AES/CBC/NoPadding");
- } catch (NoSuchAlgorithmException e) {
- // TODO Auto-generated catch block
- e.printStackTrace();
- } catch (NoSuchPaddingException e) {
- // TODO Auto-generated catch block
- e.printStackTrace();
- }
- }
- public byte[] encrypt(String text) throws Exception
- {
- if(text == null || text.length() == 0)
- throw new Exception("Empty string");
- byte[] encrypted = null;
- try {
- cipher.init(Cipher.ENCRYPT_MODE, keyspec, ivspec);
- encrypted = cipher.doFinal(padString(text).getBytes());
- } catch (Exception e)
- {
- throw new Exception("[encrypt] " + e.getMessage());
- }
- return encrypted;
- }
- public byte[] decrypt(String code) throws Exception
- {
- if(code == null || code.length() == 0)
- throw new Exception("Empty string");
- byte[] decrypted = null;
- try {
- cipher.init(Cipher.DECRYPT_MODE, keyspec, ivspec);
- decrypted = cipher.doFinal(hexToBytes(code));
- } catch (Exception e)
- {
- throw new Exception("[decrypt] " + e.getMessage());
- }
- return decrypted;
- }
- public static String bytesToHex(byte[] data)
- {
- if (data==null)
- {
- return null;
- }
- int len = data.length;
- String str = "";
- for (int i=0; i<len; i++) {
- if ((data[i]&0xFF)<16)
- str = str + "0" + java.lang.Integer.toHexString(data[i]&0xFF);
- else
- str = str + java.lang.Integer.toHexString(data[i]&0xFF);
- }
- return str;
- }
- public static byte[] hexToBytes(String str) {
- if (str==null) {
- return null;
- } else if (str.length() < 2) {
- return null;
- } else {
- int len = str.length() / 2;
- byte[] buffer = new byte[len];
- for (int i=0; i<len; i++) {
- buffer[i] = (byte) Integer.parseInt(str.substring(i*2,i*2+2),16);
- }
- return buffer;
- }
- }
- private static String padString(String source)
- {
- char paddingChar = ' ';
- int size = 16;
- int x = source.length() % size;
- int padLength = size - x;
- for (int i = 0; i < padLength; i++)
- {
- source += paddingChar;
- }
- return source;
- }
- }
- //使用方法:
- //加密
- String encrypted = JiaMi.bytesToHex(jm.encrypt("你要加密的内容"));
- //解密
- String decrypted = new String(JiaMi.decrypt(encrypted));
- //该片段来自于http://www.codesnippet.cn/detail/200820135249.html
来源: http://www.codesnippet.cn/detail/200820135249.html