模板设计模式

import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;

/*
 * 模板设计模式
 * */

public class Test {
	public static void main(String[] args) throws Exception {
		GetTime gt1 = new ForDemo();
		System.out.println(gt1.getTime() + "毫秒");

		GetTime gt2 = new IODemo();
		System.out.println(gt2.getTime() + "毫秒");
	}
}

abstract class GetTime {
	public long getTime() {
		long start = System.currentTimeMillis();

		code();

		long end = System.currentTimeMillis();

		return end - start;
	}

	public abstract void code();
}

class ForDemo extends GetTime {
	public void code() {
		for (int i = 0; i < 100000; i++) {
			System.out.println(i);
		}
	}
}

class IODemo extends GetTime {
	public void code() {
		try {
			BufferedInputStream bis = new BufferedInputStream(new FileInputStream("E:\\zikao\\20151130054234629.xls"));
			BufferedOutputStream bos = new BufferedOutputStream(
					new FileOutputStream("E:\\zikao\\new_20151130054234629.xls"));
			byte bys[] = new byte[1024];
			int len = 0;
			while ((len = bis.read(bys)) != -1) {
				bos.write(bys, 0, len);
			}
			bos.close();
			bis.close();
		} catch (IOException e) {
			e.printStackTrace();
		}
	}
}