java SHA1密碼編譯演算法

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package com.cn.test.rsa;import java.security.MessageDigest;import java.security.NoSuchAlgorithmException;import java.util.Random;public class GenerServerDigest {    //產生32位隨機數    public static String generatorRandom(){        String _RndData;        int b = 0;        int a = 0;        _RndData = "";        Random r = new Random();        for (int i = 0; i < 32; i++) {            a = r.nextInt(26);            b = (char) (a + 65);            _RndData += new Character((char) b).toString();        }        return _RndData;    }    public static void main(String[] args) {        String ServerDigest = null;        try{            //進行SHA1運算             char[] HEXCHAR = { ‘0‘, ‘1‘, ‘2‘, ‘3‘, ‘4‘, ‘5‘, ‘6‘, ‘7‘,                     ‘8‘, ‘9‘, ‘a‘, ‘b‘, ‘c‘, ‘d‘, ‘e‘, ‘f‘ };             String MsgtoDigest = GenerServerDigest.generatorRandom();             MessageDigest md = null;            md = MessageDigest.getInstance("SHA1");                        byte[] digest = md.digest(MsgtoDigest.getBytes());                         StringBuilder sb = new StringBuilder(digest.length * 2);             for (int i = 0; i < digest.length; i++) {                 sb.append(HEXCHAR[(digest[i] & 0xf0) >>> 4]);                 sb.append(HEXCHAR[digest[i] & 0x0f]);             }             ServerDigest = sb.toString();        } catch (NoSuchAlgorithmException e){            e.printStackTrace();        }        System.out.println(ServerDigest);    }}

 

java SHA1密碼編譯演算法