博客

将文件流(InputStream)写入文件

方式一：不包裹Buffered(不使用缓冲


)

//将文件流(InputStream)写入文件
long size = 0;
FileOutputStream out = new FileOutputStream(strFileFullPath);
int len = -1;
byte[] b = new byte[1024];
while ((len = is.read(b)) != -1) {
	out.write(b, 0, len);
	size += len;
}
is.close();
out.close();
System.out.println("文件下载 size:" + size);

方式二：包裹Buffered(使用缓冲


)

//将文件流(InputStream)写入文件
long size = 0;
BufferedInputStream in = new BufferedInputStream(is);
BufferedOutputStream out = new BufferedOutputStream(new FileOutputStream(strFileFullPath));
int len = -1;
byte[] b = new byte[1024];
while((len = in.read(b)) != -1){
	out.write(b, 0, len);
	size += len;
}
in.close();
out.close();
System.out.println("文件下载 size:" + size);

将上传文件MultipartFile写到文件

//将上传文件MultipartFile写到文件
File dest = new File(strFileFullPath);
file.transferTo(dest);

参考：

将一个输入流(InputStream)写入到一个文件中_y_bccl27的博客-CSDN博客_inputstream写入文件