Base64算法实现:可以将任意的字节数组数据，通过算法，生成只有（大小写英文、数字、+、/）（一共64个字符）内容表示的字符串数据。
private static final String str = "鲤鱼精"; -JDK实现 BASE64Encoder encoder = new BASE64Encoder(); String encode = encoder.encode(str.getBytes()); System.out.println("encode:" + encode); BASE64Decoder decoder = new BASE64Decoder(); System.out.println("decode:"+new String(decoder.decodeBuffer(encode))); -Commons Codes实现 byte[] encode = Base64.encodeBase64(str.getBytes()); System.out.println("encode:"+new String(encode)); byte[] decode = Base64.decodeBase64(encode); System.out.println("decode:"+new String(decode)); -Bouncy Castle实现 byte[] encode = org.bouncycastle.util.encoders.Base64.encode(str.getBytes()); System.out.println("encode:"+new String(encode)); byte[] decode = org.bouncycastle.util.encoders.Base64.decode(encode); System.out.println("decode:"+new String(decode)); 12345678910111213141516171819202122 12345678910111213141516171819202122 使用场景：e-mail 密钥 短文本Java加解密案例源码地址:http://download.csdn.net/detail/jacxuan/9774737
