From 6c1c87969b021954a9bac09adba4690c9b5de8d4 Mon Sep 17 00:00:00 2001
From: xuxin <840198532@qq.com>
Date: Mon, 23 Mar 2026 10:37:07 +0800
Subject: [PATCH] =?UTF-8?q?=E8=BF=9B=E9=98=B6day10-=E4=BD=BF=E7=94=A8?=
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---
 .../com/inmind/buffered_stream01/Demo03.java  | 52 +++++++++++++++++++
 1 file changed, 52 insertions(+)
 create mode 100644 javaSE-day10/src/com/inmind/buffered_stream01/Demo03.java

diff --git a/javaSE-day10/src/com/inmind/buffered_stream01/Demo03.java b/javaSE-day10/src/com/inmind/buffered_stream01/Demo03.java
new file mode 100644
index 0000000..5858c0e
--- /dev/null
+++ b/javaSE-day10/src/com/inmind/buffered_stream01/Demo03.java
@@ -0,0 +1,52 @@
+package com.inmind.buffered_stream01;
+
+import java.io.*;
+
+public class Demo03 {
+
+    //使用字节缓冲输入输出流复制一个文件，并计算出时间（一次读写一个字节数组）
+    public static void main(String[] args) throws IOException {
+        /*FileInputStream fis = new FileInputStream("D:\\io_test\\upload\\1.jpg");
+        FileOutputStream fos = new FileOutputStream("D:\\io_test\\upload\\2.jpg");*/
+
+        BufferedInputStream bis = new BufferedInputStream(new FileInputStream("D:\\io_test\\upload\\1.jpg"));
+        BufferedOutputStream bos = new BufferedOutputStream(new FileOutputStream("D:\\io_test\\upload\\3.jpg"));
+
+        byte[] bytes = new byte[1024];//读取到的字节数据保存到该数组中
+        int len ;//获取读取到的字节数据的长度
+
+        long start = System.currentTimeMillis();
+
+        while ((len = bis.read(bytes)) != -1) {
+            bos.write(bytes,0,len);
+        }
+        long end = System.currentTimeMillis();
+
+        System.out.println("使用字节流复制文件花费："+(end- start));//3ms
+
+        bis.close();
+        bos.close();
+    }
+
+
+    //使用原始的字节输入输出流复制一个文件，并计算出时间（一次读写一个字节数组）
+    public static void method(String[] args) throws IOException {
+        FileInputStream fis = new FileInputStream("D:\\io_test\\upload\\1.jpg");
+        FileOutputStream fos = new FileOutputStream("D:\\io_test\\upload\\2.jpg");
+
+        byte[] bytes = new byte[1024];//读取到的字节数据保存到该数组中
+        int len ;//获取读取到的字节数据的长度
+
+        long start = System.currentTimeMillis();
+
+        while ((len = fis.read(bytes)) != -1) {
+            fos.write(bytes,0,len);
+        }
+        long end = System.currentTimeMillis();
+
+        System.out.println("使用字节流复制文件花费："+(end- start));//8ms
+
+        fis.close();
+        fos.close();
+    }
+}