haJNq6bK

1import javax.xml.bind.DatatypeConverter;
2import java.security.MessageDigest;
3import java.security.NoSuchAlgorithmException;
4
5public class SignGenerator
6{
7
8    public static void main(String a[])
9    {
10        // Demo
11        String client_id = "liuxd";
12        String user_token = "23343we356";
13        String secret_key = "15fc7a0b4f050989554e3c9cadc693fd";
14
15        String sign = getSign(client_id, user_token, secret_key);
16
17        System.out.println(sign);
18    }
19
20    private static String getSign(String client_id, String user_token, String secret_key)
21    {
22        String str = client_id + user_token;
23
24        byte[] message = str.getBytes();
25
26        String tmp1 = DatatypeConverter.printBase64Binary(message);
27        String tmp2 = tmp1.substring(0, tmp1.length() - 2);
28        String tmp3 = tmp2 + secret_key;
29        StringBuffer tmp4 = new StringBuffer(tmp3);
30        StringBuffer tmp5 = tmp4.reverse();
31        String tmp6 = tmp5.toString();
32        String tmp7 = MD5(tmp6);
33
34        return tmp7;
35    }
36
37    private static String MD5(String sourceStr)
38    {
39        String result = "";
40
41        try {
42            MessageDigest md = MessageDigest.getInstance("MD5");
43            md.update(sourceStr.getBytes());
44            byte b[] = md.digest();
45            int i;
46            StringBuffer buf = new StringBuffer("");
47
48            for (int offset = 0; offset < b.length; offset++) {
49                i = b[offset];
50
51                if (i < 0) {
52                    i += 256;
53                }
54
55                if (i < 16) {
56                    buf.append("0");
57                }
58
59                buf.append(Integer.toHexString(i));
60            }
61
62            result = buf.toString();
63        } catch (NoSuchAlgorithmException e) {
64            System.out.println(e);
65        }
66
67        return result;
68    }
69}