commons-codec使用介绍

小灰灰 2021-09-16 00:28 720阅读 0赞

[https://blog.csdn.net/jianggujin/article/details/51149133][https_blog.csdn.net_jianggujin_article_details_51149133]

`commons-codec`是Apache开源组织提供的用于摘要运算、编码的包。在该包中主要分为四类加密：BinaryEncoders、DigestEncoders、LanguageEncoders、NetworkEncoders。

今天就为大家介绍一下如何用`commons-codec`包完成常见的编码、摘要运算。

# Base64 #

示例代码：

@Test
    public void testBase64()
    {
       System.out.println("==============Base64================");
       byte[] data = "jianggujin".getBytes();
       Base64 base64 = new Base64();
       String encode = base64.encodeAsString(data);
       System.out.println(encode);
       System.out.println(new String(base64.decode(encode)));
    }

运行结果：

==============Base64================
    amlhbmdndWppbg==
    jianggujin

# MD5摘要运算 #

示例代码：

@Test
    public void testMD5()
    {
       System.out.println("==============MD5================");
       String result = DigestUtils.md5Hex("jianggujin");
       System.out.println(result);
    }

运行结果：

acab4efdfd3b8efcdec37fe160d7be0e

SHA等摘要运算和MD5类似。

# URLCodec #

示例代码：

@Test
    public void testURLCodec() throws Exception
    {
       System.out.println("==============URLCodec================");
       URLCodec codec = new URLCodec();
       String data = "蒋固金";
       String encode = codec.encode(data, "UTF-8");
       System.out.println(encode);
       System.out.println(codec.decode(encode, "UTF-8"));
    }

运行结果：

==============URLCodec================
    %E8%92%8B%E5%9B%BA%E9%87%91
    蒋固金

*  代码：

package com.gujin.codec;
    
    import org.apache.commons.codec.binary.Base64;
    import org.apache.commons.codec.digest.DigestUtils;
    import org.apache.commons.codec.net.URLCodec;
    import org.junit.Test;
    
    public class CodecTest
    {
       @Test
       public void testBase64()
       {
          System.out.println("==============Base64================");
          byte[] data = "jianggujin".getBytes();
          Base64 base64 = new Base64();
          String encode = base64.encodeAsString(data);
          System.out.println(encode);
          System.out.println(new String(base64.decode(encode)));
       }
    
       @Test
       public void testMD5()
       {
          System.out.println("==============MD5================");
          String result = DigestUtils.md5Hex("jianggujin");
          System.out.println(result);
       }
    
       @Test
       public void testURLCodec() throws Exception
       {
          System.out.println("==============URLCodec================");
          URLCodec codec = new URLCodec();
          String data = "蒋固金";
          String encode = codec.encode(data, "UTF-8");
          System.out.println(encode);
          System.out.println(codec.decode(encode, "UTF-8"));
       }
    }

[https_blog.csdn.net_jianggujin_article_details_51149133]: https://blog.csdn.net/jianggujin/article/details/51149133