1 public class MD5 {
2
3 // 全局数组
4 private final static String[] strDigits = { "0", "1", "2", "3", "4", "5", "6", "7", "8", "9", "a", "b", "c", "d", "e", "f" };
6
7 // 返回形式为数字跟字符串
8 private static String byteToArrayString(byte bByte) {
9 int iRet = bByte;
11 if (iRet < 0) {
12 iRet += 256;
13 }
14 int iD1 = iRet / 16;
15 int iD2 = iRet % 16;
16 return strDigits[iD1] + strDigits[iD2];
17 }
18
19 // 转换字节数组为16进制字串
20 private static String byteToString(byte[] bByte) {
21 StringBuffer sBuffer = new StringBuffer();
22 for (int i = 0; i < bByte.length; i++) {
23 sBuffer.append(byteToArrayString(bByte[i]));
24 }
25 return sBuffer.toString();
26 }
27
28 public static String GetMD5Code(String strObj) {
29 String resultString = null;
30 try {
31 resultString = new String(strObj);
32 MessageDigest md = MessageDigest.getInstance("MD5");
33 resultString = byteToString(md.digest(strObj.getBytes()));
34 } catch (NoSuchAlgorithmException ex) {
35 ex.printStackTrace();
36 }
37 return resultString;
38 }
39 }
