package com.jj.springshop.pojo.utils;

import org.apache.commons.codec.digest.DigestUtils;

public class MD5Utils {

    public static String md5(String src) {
        return DigestUtils.md5Hex(src);
    }

    private static final String salt = "1a2b3c4d";

    public static String inputPassToFormPass(String inputPass) {
        String str = ""+salt.charAt(0)+salt.charAt(2) + inputPass +salt.charAt(5) + salt.charAt(4);
        System.out.println(str);
        return md5(str);
    }

    public static String formPassToDBPass(String formPass, String salt) {
        String str = ""+salt.charAt(0)+salt.charAt(2) + formPass +salt.charAt(5) + salt.charAt(4);
        return md5(str);
    }

    public static String inputPassToDbPass(String inputPass, String saltDB) {
        String formPass = inputPassToFormPass(inputPass);
        String dbPass = formPassToDBPass(formPass, saltDB);
        return dbPass;
    }
    //編寫主類進行測試
    public static void main(String args[]) {
        String s = "Kodak";
        System.out.println("原始：" + s);

        System.out.println("加密後："+MD5Utils.inputPassToFormPass(s));

    }
}



或者：

public class Encryption {

    //MD5加密
    public static String Md5Util(String password) throws NoSuchAlgorithmException {
        MessageDigest md = MessageDigest.getInstance("MD5");
        md.update(password.getBytes());
        String str=new BigInteger(1,md.digest()).toString(32);
        return str;
    }
}

使用者註冊測試：（密碼加密）

public RespResult<String> insert(@RequestBody Member member,HttpServletRequest request) throws NoSuchAlgorithmException {

    HttpSession session = request.getSession();

    //密碼加密
    String newPassword = Encryption.Md5Util(member.getPassword());
    member.setPassword(newPassword);

    //手機號唯一判斷
    int i  = memberMapper.selectExist(member.getPhone());
    if (i>0){
        return returnFailed("該手機號已被註冊");
    }

    int j = memberMapper.insert(member);
    if (j>0){
        session.setAttribute("phone",member.getPhone());
        session.setMaxInactiveInterval(60*60);
        return returnSuccess("註冊成功");
    }else {
        return returnFailed("註冊失敗");
    }

}