Java实现Base64加密

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实现Base64算法的几种方式

通过JDK
通过Apache的Commons Codec
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.csdn.net/detail/fucaihe/8633707
http://download.csdn.net/detail/fucaihe/8633703

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