MD5工具类

 1 import java.security.MessageDigest;
 2 
 3 public class MD5Tools {
 4    public final static String MD5(String s) {
 5       char hexDigits[] = { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9',
 6             'A', 'B', 'C', 'D', 'E', 'F' };
 7       try {
 8          byte[] btInput = s.getBytes();
 9          // 获得MD5摘要算法的 MessageDigest 对象
10          MessageDigest mdInst = MessageDigest.getInstance("MD5");
11          // 使用指定的字节更新摘要
12          mdInst.update(btInput);
13          // 获得密文
14          byte[] md = mdInst.digest();
15          // 把密文转换成十六进制的字符串形式
16          int j = md.length;
17          char str[] = new char[j * 2];
18          int k = 0;
19          for (int i = 0; i < j; i++) {
20             byte byte0 = md[i];
21             str[k++] = hexDigits[byte0 >>> 4 & 0xf];
22             str[k++] = hexDigits[byte0 & 0xf];
23          }
24          return new String(str);
25       } catch (Exception e) {
26          e.printStackTrace();
27          return null;
28       }
29    }
30 
31  public static String getAccountMD5(UsAccount account){
32       String sprit ="|";
33       String key = "mooyii2015";
34       StringBuffer sb = new StringBuffer();
35       sb.append(account.getUserId()+sprit);
36       sb.append(account.getOrgId()+sprit);
37       sb.append(account.getAccountCash()+sprit);
38       sb.append(account.getAccountVirtual()+sprit);
39       sb.append(account.getAccountBonus()+sprit);
40       sb.append(key);
41       System.out.println(sb.toString());
42       return MD5(sb.toString());
43    }
44    
45    public static void main(String[] args){
46       UsAccount account = new UsAccount();
47       account.setUserId("user201511021029361178621");
48       account.setOrgId("user201511021029361178621");
49       account.setAccountCash("1000");
50       account.setAccountBonus("200");
51       account.setAccountVirtual("42");
52       System.out.println(MD5Tools.getAccountMD5(account));
53       System.out.println(MD5Tools.getAccountMD5(account).length());
54    }
55 }