Java实现Base64加密

实现Base64算法的几种方式

1. 通过JDK
2. 通过Apache的Commons Codec
3. 通过Bouncy Castle

下面是具体的实现方式类

package com.fch.base64;

import java.io.IOException;

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

import sun.misc.BASE64Decoder;
import sun.misc.BASE64Encoder;

/**
 * Java实现Base64算法
 * 
 * @author admin
 *
 */
public class JavaBase64Test {
    /**
     * 算法实现方式
     * 
     * 1.JDK
     * 
     * 2。Commons Codec(Apache)
     * 
     * 3.Bouncy Castle
     * 
     * 应用场景 e-mail、密钥、证书文件
     */

    public static void main(String[] args) {
        jdkBase64("java security base64");
        commonsCodesBase64("java security base64");
        bouncyCastleBase64("java security base64");
    }

    /**
     * JDK 实现Base64(不推荐)
     * 
     * @param encryStr
     * @throws IOException
     */
    public static void jdkBase64(String encryStr) {
        try {
            System.out
                    .println("====================JDK Base64====================");
            BASE64Encoder encoder = new BASE64Encoder();
            String encodeStr = encoder.encode(encryStr.getBytes());
            System.out.println("encode : " + encodeStr);

            BASE64Decoder decoder = new BASE64Decoder();
            byte[] by;
            by = decoder.decodeBuffer(encodeStr);
            String byStr = new String(by);
            System.out.println("decode : " + byStr);
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        System.out.println();
    }

    /**
     * Commons Codec 实现Base64
     * 
     * @param encoderStr
     */
    public static void commonsCodesBase64(String encoderStr) {
        System.out
                .println("====================Commons Codec Base64====================");
        byte[] encodeBytes = Base64.encodeBase64(encoderStr.getBytes());
        System.out.println("encode : " + new String(encodeBytes));

        byte[] decodeBytes = Base64.decodeBase64(encodeBytes);
        System.out.println("decode : " + new String(decodeBytes));

        System.out.println();
    }

    /**
     * Bouncy Castle 实现Base64
     * 
     * 感觉速度比较慢
     * 
     * @param encoderStr
     */
    public static void bouncyCastleBase64(String encoderStr) {
        System.out
                .println("====================Bouncy Castle Base64====================");
        byte[] encodeBytes = org.bouncycastle.util.encoders.Base64
                .encode(encoderStr.getBytes());
        System.out.println("encode : " + new String(encodeBytes));

        byte[] decodeBytes = org.bouncycastle.util.encoders.Base64
                .decode(encodeBytes);
        System.out.println("decode : " + new String(decodeBytes));
        System.out.println();
    }
}

其中Commons Codec和Bouncy Castle属于第三方提供，需要下载相应的jar包，后者jar包与jdk的版本相对应，前者对jdk没有太多依赖。

提供两个jar包的下载链接：

http://download.youkuaiyun.com/detail/fucaihe/8633707
http://download.youkuaiyun.com/detail/fucaihe/8633703