Base64实现测试，不要太相信apache-common的性能

	/**
	 * 用于命令行调用
	 * 
	 * @throws Exception
	 */
	public static void main(String[] args) throws Exception {
		
		byte[] binaryData = "这是一个小小的测试 this is a test only".getBytes();
		
		long t1 = System.currentTimeMillis();
		
		for (int i = 0; i < 10000 * 1000; i++)
			Base64.decode(Base64.encode(binaryData));
		
		long t2 = System.currentTimeMillis();
		
		Encoder encoder = java.util.Base64.getEncoder();
		Decoder decoder = java.util.Base64.getDecoder();
		for (int i = 0; i < 10000 * 1000; i++)
			decoder.decode(encoder.encodeToString(binaryData));
		
		long t3 = System.currentTimeMillis();
		
		for (int i = 0; i < 10000 * 1000; i++)
			org.apache.commons.codec.binary.Base64.decodeBase64(org.apache.commons.codec.binary.Base64.encodeBase64String(binaryData));
		
		long t4 = System.currentTimeMillis();
		
		System.out.println("t2-t1:"+(t2-t1));
		System.out.println("t3-t2:"+(t3-t2));
		System.out.println("t4-t3:"+(t4-t3));
	}