package com.cxl.beanutil.util;

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

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

 import java.io.FileInputStream;

 import java.io.IOException;

 import java.io.UnsupportedEncodingException;

 /**

  *

  *Codec提供了一些公共的编码实现

  */

 public class Codec {

     /**

      * 计算字符串的MD5

      * @param str

      * @return

      */

     public static String strMD5(String str) {

         str = DigestUtils.md5Hex(str);

         System.out.println(str);

         return str;

     }

     /**

      * 文件的MD5

      * @param path

      * @return

      */

     public static String fileMD5(String path) {

         try {

             String str = DigestUtils.md5Hex(new FileInputStream(path));

             System.out.println(str);

             return str;

         } catch (IOException e) {

             e.printStackTrace();

         }

         return "";

     }

     /**

      * 编码

      * @param string

      * @return

      */

     public static String encode(String string) {

         Base64 base64 = new Base64();

         try {

             string = base64.encodeToString(string.getBytes("utf-8"));

             System.out.println("Base64 编码后：" + string);

         } catch (UnsupportedEncodingException e) {

             e.printStackTrace();

         }

         return string;

     }

     /**

      * 解码

      * @param string

      */

     public static void decode(String string) {

         Base64 base64 = new Base64();

         string = new String(base64.decode(string));

         System.out.println("Base 解码后：" + string);

     }

 }

 package com.cxl.beanutil.test;

 import com.cxl.beanutil.util.Codec;

 import com.sun.tools.javac.jvm.Code;

 /**

  * Created by chaixinli on 2017/9/26.

  */

 public class TestCodec {

     public static void main(String[] args) {

         Codec.encode("doudou");

         Codec.decode("ZG91ZG91");

         Codec.strMD5("doudou");

         Codec.fileMD5("/Users/doudou/Downloads/service.sh");

     }

 }

<!-- https://mvnrepository.com/artifact/commons-codec/commons-codec -->

    <dependency>

        <groupId>commons-codec</groupId>

        <artifactId>commons-codec</artifactId>

        <version>1.10</version>

    </dependency>