From aeca9c4177bfeebeeb3240537d28caacc14191f8 Mon Sep 17 00:00:00 2001
From: xuxin <840198532@qq.com>
Date: Sun, 9 Aug 2026 16:53:05 +0800
Subject: [PATCH] =?UTF-8?q?s-day09-=E6=96=87=E4=BB=B6=E7=9A=84=E7=BB=AD?=
 =?UTF-8?q?=E5=86=99=E5=B9=B6=E5=86=99=E5=87=BA=E5=AD=97=E8=8A=82=E6=95=B0?=
 =?UTF-8?q?=E7=BB=84?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 s-day09/src/com/inmind/io_out01/Demo04.java | 24 +++++++++++++++++++++
 1 file changed, 24 insertions(+)
 create mode 100644 s-day09/src/com/inmind/io_out01/Demo04.java

diff --git a/s-day09/src/com/inmind/io_out01/Demo04.java b/s-day09/src/com/inmind/io_out01/Demo04.java
new file mode 100644
index 0000000..2317673
--- /dev/null
+++ b/s-day09/src/com/inmind/io_out01/Demo04.java
@@ -0,0 +1,24 @@
+package com.inmind.io_out01;
+
+import java.io.FileOutputStream;
+import java.io.IOException;
+
+/*
+文件的续写并写出字节数组
+    续写:默认会将原本文件中的数据覆盖,但是我们想继续拼接输入
+    续写就是使用重载的构造方法即可,true:续写  false:覆盖
+        FileOutputStream(String name, boolean append) 创建文件输出流以指定的名称写入文件。
+    写出字节数组
+        void write(byte[] b) 将 b.length字节从指定的字节数组写入此文件输出流。
+        void write(byte[] b, int off, int len) 将 len字节从指定的字节数组开始，从偏移量 off开始写入此文件输出流。
+ */
+public class Demo04 {
+    public static void main(String[] args) throws IOException {
+        //往a.txt中续写：“我是谁，我在哪，我在干嘛”
+        FileOutputStream fos = new FileOutputStream("a.txt",true);
+        String str = "，我在哪，我在干嘛";
+        byte[] bytes = str.getBytes();
+        fos.write(bytes);
+        fos.close();
+    }
+}