對字串進行簡單加密，直接上程式碼：

package com.imooc.utils;

import org.apache.commons.codec.binary.Base64;

import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;


/**
 * mds加密類
 */
public class MD5Utils {
       public static String getMD5Str(String strValue) throws NoSuchAlgorithmException {
           MessageDigest md5 = MessageDigest.getInstance("MD5");
           String newStr = Base64.encodeBase64String(md5.digest(strValue.getBytes()));
           return newStr;
       }

    public static void main(String[] args) {
        try {
            String md5 = getMD5Str("imooc");
            System.out.println("加密："+md5);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}