IO流-复制较大数据的非文本文件

最新推荐文章于 2024-05-22 13:24:33 发布

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本文介绍了如何在Java中使用BufferedStream类来读取和写入大文件（如视频文件），通过缓冲区优化数据传输并处理IOException。

package io;

import java.io.*;

/**
 * @author 苗晓强
 * @date 2023/8/5 17:51
 * 使用缓冲流读写较大数据的非文本文件
 */
public class BufferedStream {
    public static void main(String[] args) {
        File srcFile = new File("miao.mp4");
        File descFile = new File("miao_copy.mp4");
        FileInputStream fileInputStream;
        FileOutputStream fileOutputStream;
        BufferedInputStream bufferedInputStream = null;
        BufferedOutputStream bufferedOutputStream = null;
        try {
            fileInputStream = new FileInputStream(srcFile);
            fileOutputStream = new FileOutputStream(descFile);
            bufferedInputStream = new BufferedInputStream(fileInputStream);
            bufferedOutputStream = new BufferedOutputStream(fileOutputStream);
            int len;
            byte [] buffer = new byte[1024];
            while ((len = bufferedInputStream.read(buffer)) != -1){
                bufferedOutputStream.write(buffer,0,len);
                bufferedOutputStream.flush();
            }
            System.out.println("复制成功！");
        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            if (bufferedOutputStream != null){
                try {
                    bufferedOutputStream.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
            if (bufferedInputStream != null){
                try {
                    bufferedInputStream.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        }


    }
}