1. 字符缓冲流复制文本文件

import java.io.BufferedReader; import java.io.BufferedWriter; import java.io.FileReader; import java.io.FileWriter; import java.io.IOException; public class CopyTextByCharBuffer { public static void main(String[] args) { // 源文件、目标文件路径 String srcPath = "source.txt"; String destPath = "target.txt"; try (BufferedReader br = new BufferedReader(new FileReader(srcPath)); BufferedWriter bw = new BufferedWriter(new FileWriter(destPath))) { String line; // 按行读取，逐行写入 while ((line = br.readLine()) != null) { bw.write(line); bw.newLine(); // 换行，还原原文换行 } System.out.println("文本文件复制完成"); } catch (IOException e) { e.printStackTrace(); } } }

2. 字节缓冲流万能复制任意文件

import java.io.BufferedInputStream; import java.io.BufferedOutputStream; import java.io.FileInputStream; import java.io.FileOutputStream; import java.io.IOException; public class CopyAnyFileByByteBuffer { public static void main(String[] args) { // 可传入图片、视频、压缩包、txt等任意文件 String srcPath = "test.jpg"; String destPath = "copy_test.jpg"; try (BufferedInputStream bis = new BufferedInputStream(new FileInputStream(srcPath)); BufferedOutputStream bos = new BufferedOutputStream(new FileOutputStream(destPath))) { byte[] buffer = new byte[8192]; // 缓冲数组 int len; while ((len = bis.read(buffer)) != -1) { bos.write(buffer, 0, len); } bos.flush(); // 刷新缓冲区 System.out.println("任意文件复制完成"); } catch (IOException e) { e.printStackTrace(); } } }