| 提交 | 用户 | age | ||
| a6a76f | 1 | package com.yc.utils; |
| F | 2 | |
| 3 | import java.security.MessageDigest; | |
| 4 | import java.security.NoSuchAlgorithmException; | |
| 5 | ||
| 6 | import javax.servlet.http.HttpServletRequest; | |
| 7 | import javax.servlet.http.HttpSession; | |
| 8 | ||
| 9 | /** | |
| 10 | * 令牌生成类 | |
| 11 | * */ | |
| 12 | public class TokenUtil { | |
| 13 | ||
| 14 | /** | |
| 15 | * @param args | |
| 16 | */ | |
| 17 | public static void main(String[] args) { | |
| 18 | // TODO Auto-generated method stub | |
| 19 | System.out.print(generateToken(null)); | |
| 20 | ||
| 21 | } | |
| 22 | ||
| 23 | public static String generateToken(HttpServletRequest request) { | |
| 24 | HttpSession session = request.getSession(); | |
| 25 | try { | |
| 26 | byte id[] = session.getId().getBytes(); | |
| 27 | byte now[] = | |
| 28 | new Long(System.currentTimeMillis()).toString().getBytes(); | |
| 29 | MessageDigest md = MessageDigest.getInstance("MD5"); | |
| 30 | md.update(id); | |
| 31 | md.update(now); | |
| 32 | String token=bytesToHexString(md.digest()); | |
| 33 | session.setAttribute("_token",token ); | |
| 34 | return token; | |
| 35 | } catch (IllegalStateException e) { | |
| 36 | return (null); | |
| 37 | } catch (NoSuchAlgorithmException e) { | |
| 38 | return (null); | |
| 39 | } | |
| 40 | } | |
| 41 | public static String bytesToHexString(byte[] src){ | |
| 42 | StringBuilder stringBuilder = new StringBuilder(""); | |
| 43 | if (src == null || src.length <= 0) { | |
| 44 | return null; | |
| 45 | } | |
| 46 | for (int i = 0; i < src.length; i++) { | |
| 47 | int v = src[i] & 0xFF; | |
| 48 | String hv = Integer.toHexString(v); | |
| 49 | if (hv.length() < 2) { | |
| 50 | stringBuilder.append(0); | |
| 51 | ||
| 52 | } | |
| 53 | stringBuilder.append(hv); | |
| 54 | ||
| 55 | } | |
| 56 | return stringBuilder.toString(); | |
| 57 | } | |
| 58 | } | |
