JAVA Io 緩衝輸入輸出流

java中提供帶緩衝的輸入輸出流。在打開文件進行寫入或讀取操作時，都會加上緩衝，提高了IO讀寫性能。

1. BufferedInputStream 緩衝輸入流

2. BufferedOutputStream 緩衝輸出流

使用帶緩衝的輸入輸出流寫一個拷貝文件的操作。

package com.dcz.io;

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

public class BufferStream {

	/**
	 * 拷貝文件帶緩衝
	 * 
	 * @param srcFile
	 * @param destFile
	 * @throws Exception
	 */
	public static void copyFileByBuffer(File srcFile, File destFile)
			throws Exception {

		// 緩衝輸入流
		BufferedInputStream bufferInputStream = new BufferedInputStream(
				new FileInputStream(srcFile));
		// 緩衝輸出流
		BufferedOutputStream bufferOutputStream = new BufferedOutputStream(
				new FileOutputStream(destFile));

		int bytes = 0;
		while ((bytes = bufferInputStream.read()) != -1) {
			bufferOutputStream.write(bytes);
			bufferOutputStream.flush();
		}
		bufferOutputStream.close();
		bufferInputStream.close();
	}

	public static void main(String[] args) throws Exception {

		BufferStream.copyFileByBuffer(new File("D:\\cglib-3.1.jar"), new File(
				"D:\\aa.jar"));
	}

}