数组如何转换成fileInputStream – PHP基础 – 前端 php手机头像保存失败

1、将File、fileInputStream 转换为byte数组：File file = new File(“file.txt”);InputStream input = new FileInputStream(file);byte[] byt = new byte[input.available()];input.read(byt);

2、将byte数组转换为InputStream：byte[] byt = new byte[1024];InputStream input = new ByteArrayInputStream(byt);

3、将byte数组转换为File：File file = new File(”);OutputStream output = new FileOutputStream(file);BufferedOutputStream bufferedOutput = new BufferedOutputStream(output);bufferedOutput.write(byt);