Java创建一个临时文件方法

public File save(byte[] data) {
OutputStream stream = null;

try {
File tmpFile = File.createTempFile("screenshot", ".png");
tmpFile.deleteOnExit();

stream = new FileOutputStream(tmpFile);
stream.write(data);

return tmpFile;
} catch (IOException e) {
throw new WebDriverException(e);
} finally {
if (stream != null) {
try {
stream.close();
} catch (IOException e) {
// Nothing sane to do
}
}
}
}