MD5加密（Android里和Java SE里是一样的） 

 1 package com.gnnuit.mobilesafe.util;
 2 
 3 import java.security.MessageDigest;
 4 import java.security.NoSuchAlgorithmException;
 5 
 6 public class MD5Encoder {
 7     /**
 8      * MD5加密
 9      * 
10      * @param pwd要加密的数据
11      * @return 加密后的数据
12      * @throws Exception
13      */
14     public static String encode(String pwd) {
15         try {
16             MessageDigest digest = MessageDigest.getInstance("MD5");
17             byte[] bytes = digest.digest(pwd.getBytes());
18             StringBuffer sb = new StringBuffer();
19             for (int i = 0; i < bytes.length; i++) {
20                 String s = Integer.toHexString(0xff & bytes[i]);
21                 if (s.length() == 1) {
22                     sb.append("0" + s);
23                 } else {
24                     sb.append(s);
25                 }
26             }
27             return sb.toString();
28         } catch (NoSuchAlgorithmException e) {
29             // TODO Auto-generated catch block
30             e.printStackTrace();
31             throw new RuntimeException("永远不会发生");
32         }
33     }
34 }

 

posted @ 2013-12-27 21:53  yly123  阅读(438)  评论(0)    收藏  举报