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

1. BufferedInputStream 緩沖輸入流

2. BufferedOutputStream 緩沖輸出流

使用帶緩沖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 {/*** 拷貝文件帶緩沖* * @param srcFile* @param destFile* @throws Exception*/public static void copyFileByBuffer(File srcFile, File destFile)throws Exception {// 緩沖輸入流BufferedInputStream bufferInputStream = new BufferedInputStream(new FileInputStream(srcFile));// 緩沖輸出流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"));}}

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轉(zhuǎn)載于:https://www.cnblogs.com/dcz1001/p/5927654.html

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