java實現MD5演算法

package com.roomSearchTest;

import java.security.MessageDigest;

public class MD5Util {
    public final static String MD5(String s) {
        char hexDigits[] = { '0', '1', '2', '3', '4',
                             '5', '6', '7', '8', '9',
                             'A', 'B', 'C', 'D', 'E', 'F'};
        try {
            byte[] btInput = s.getBytes();
            MessageDigest mdInst = MessageDigest.getInstance("MD5");
            mdInst.update(btInput);
            byte[] md = mdInst.digest();
            int j = md.length;
            char str[] = new char[j * 2];
            int k = 0;
            for (int i = 0; i < j; i++) {
                byte byte0 = md[i];
                str[k++] = hexDigits[byte0 >>> 4 & 0xf];
                str[k++] = hexDigits[byte0 & 0xf];
            }
            return new String(str);
        }
        catch (Exception e) {
            e.printStackTrace();
            return null;
        }
    }

    public static void main(String[] args) {
       String temp1 = MD5Util.MD5("宮城県塩竈市藤倉3仙石線/東塩釜");
       String temp2 = MD5Util.MD5("宮城県塩竈市藤倉3仙石線//東塩釜");
       if(temp1.equals(temp2))
       {
        System.out.println(temp1 + "  ok");
       }
       else
       {
        System.out.println(temp1+"  "+temp2+"  false");
       }
    }

}