From 087f5e1371adae90ffba08bcbf836f94b6869b35 Mon Sep 17 00:00:00 2001
From: xuxin <840198532@qq.com>
Date: Tue, 11 Aug 2026 10:24:36 +0800
Subject: [PATCH] =?UTF-8?q?s-day09-=E4=BD=BF=E7=94=A8=E5=AD=97=E8=8A=82?=
 =?UTF-8?q?=E8=BE=93=E5=85=A5=E6=B5=81=E4=B8=80=E6=AC=A1=E8=AF=BB=E5=8F=96?=
 =?UTF-8?q?=E4=B8=80=E4=B8=AA=E5=AD=97=E8=8A=82=E6=95=B0=E7=BB=84?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 s-day09/src/com/inmind/io_in02/Demo07.java | 48 ++++++++++++++++++++++
 1 file changed, 48 insertions(+)
 create mode 100644 s-day09/src/com/inmind/io_in02/Demo07.java

diff --git a/s-day09/src/com/inmind/io_in02/Demo07.java b/s-day09/src/com/inmind/io_in02/Demo07.java
new file mode 100644
index 0000000..f760327
--- /dev/null
+++ b/s-day09/src/com/inmind/io_in02/Demo07.java
@@ -0,0 +1,48 @@
+package com.inmind.io_in02;
+
+import java.io.FileInputStream;
+import java.io.IOException;
+
+/*
+使用字节输入流一次读取一个字节数组
+  int read(byte[] b) 从字节输入流中将字节数据读取到参数b数组中，返回的值读取的字节个数
+
+  需求:使用字节输入流将source1.txt中的数据以一次读取一个字节数组的形式读取打印
+ */
+public class Demo07 {
+    public static void main(String[] args) throws IOException {
+        //1.创建字节输入流对象
+        FileInputStream fis = new FileInputStream("source1.txt");
+        /*
+        2.调用读方法（一次读取一个字节数组的数据）
+        int read(byte[] b) 从字节输入流中将字节数据读取到参数b数组中，返回的值读取的字节个数
+         */
+        /*byte[] bytes = new byte[2];//用来保存，字节输入流读取到的字节数据
+        int len = fis.read(bytes);//用来接收读取到的字节数据的个数
+        System.out.println(len);
+        System.out.println(new String(bytes,0,len));
+
+        len = fis.read(bytes);
+        System.out.println(len);
+        System.out.println(new String(bytes,0,len));
+
+        len = fis.read(bytes);
+        System.out.println(len);
+        System.out.println(new String(bytes,0,len));
+
+        len = fis.read(bytes);
+        System.out.println(len);
+        System.out.println(new String(bytes,0,len));*/
+
+        byte[] bytes = new byte[1024];//用来保存字节输入流读取到的字节数据
+        int len;//用来接收读取到的字节数据的个数,如果返回-1表示读取到末尾了
+        while ((len = fis.read(bytes)) != -1) {//(核心代码)
+            System.out.println(new String(bytes,0,len));
+        }
+
+        //3.释放资源
+        fis.close();
+
+        System.out.println("程序结束");
+    }
+}