java：Base64编码解码方式

Dear 丶 2022-05-08 14:38 335阅读 0赞

1.使用jdk自带包解码编码：

package com.cl;
    
    import java.io.IOException;
    
    import sun.misc.BASE64Decoder;
    import sun.misc.BASE64Encoder;
    
    public class JdkBase64 {
    
    	private static String src="imooc security base64";
    	
    	public static void main(String[] args) {
    		base64();
    	}
    
    	public static void base64(){
    		BASE64Encoder encoder=new BASE64Encoder();
    		String dst=encoder.encode(src.getBytes());
    		System.out.println("encode:"+dst);
    		BASE64Decoder decoder=new BASE64Decoder();
    		try {
    			System.out.println(new String(decoder.decodeBuffer(dst)));
    		} catch (IOException e) {
    			// TODO Auto-generated catch block
    			e.printStackTrace();
    		}
    	}
    }

若遇到不能引入相关BASE64Decoder和BASE64Decoder包的话，可以用如下方法解决：

[https://blog.csdn.net/erlian1992/article/details/79518416][https_blog.csdn.net_erlian1992_article_details_79518416]

2.使用Bouncy Caslte提供的包Base64解密加密：需要引入如下的包

![70][]

以上两个包需要匹配jdk版本使用：具体可以在[http://bouncycastle.org/latest\_releases.html][http_bouncycastle.org_latest_releases.html]里查看和下载合适版本

package com.cl;
    
    import org.bouncycastle.util.encoders.Base64;
    
    public class BCBase64 {
    
    	private static String src="imooc security base64";
    	
    	public static void main(String[] args) {
    	BouncyCastleBase64();
    	}
    	
    	public static void BouncyCastleBase64(){
    		byte[] encode=Base64.encode(src.getBytes());
    		System.out.println("encode:"+new String(encode));
    		byte[] decode=Base64.decode(encode);
    		System.out.println("decode:"+new String(decode));
    	}
    
    }

3使用Commons Codec的方法Base64解密加密：需要下载如下

![70 1][]

以上包并不需要与jdk版本对应。

package com.cl;
    
    import org.apache.commons.codec.binary.Base64;
    
    public class CCBase64 {
    
    	private static String src="imooc security base64";
    	
    	public static void main(String[] args) {
    		CommonsCodecBase64();
    	}
    	
    	public static void CommonsCodecBase64(){
    		byte[] encode=Base64.encodeBase64(src.getBytes());
    		System.out.println("encode:"+new String(encode));
    		byte[] decode=Base64.decodeBase64(encode);
    		System.out.println("decode:"+new String(decode));
    		
    	}
    
    }

4三个的运行结果一致：

![70 2][]

[https_blog.csdn.net_erlian1992_article_details_79518416]: https://blog.csdn.net/erlian1992/article/details/79518416
[70]: /images/20220506/4ea3781230f544619e70b1b714e5ad57.png
[http_bouncycastle.org_latest_releases.html]: http://bouncycastle.org/latest_releases.html
[70 1]: /images/20220506/3c338d76373c45519e2d2ee84151a378.png
[70 2]: /images/20220506/d83f1fc47f714c1cba06997d2ebd8c90.png