原来这段代码工作正常：

import java.io._
import org.apache.commons.io.FileUtils

// Create or collect the data
val bytes: Array[Byte] = <some_data>

try {
    // Write data to temp file
    // Note : Here I use GRIB2 file as I manipulate forecast data,
    //        but you can use .bin or .png/.jpg (if it's an image data)
    //        extensions or no extension at all. It doesn't matter.
    val path: String = "mf-data.grib"
    val file: File = new File(path)
    FileUtils.writeByteArrayToFile(file, bytes)
    
    // Read the temp file
    val input = new FileInputStream(path)

        ////////// Do something with it //////////

    // Remove the temp file
    if (!file.delete()) {
        println("Cannot delete temporary file !")
    }
} catch {
    case _: Throwable => println("An I/O error occured")