java上傳類

public?String?doFormFile(FormFile?file,?String?dir)?{
????????try?{
????????????File?f?=?new?File(dir);
????????????if?(!f.exists())?{
????????????????f.mkdir();//如果路徑不存在，創建
????????????}
????????????InputStream?in?=?file.getInputStream();
????????????FileOutputStream?writer?=?new?FileOutputStream(dir?+?"/"?+?file.getFileName());
????????????int?bytesRead?=?0;
????????????byte[]?buffer?=?new?byte[8192];
????????????while?((bytesRead?=?in.read(buffer,?0,?8192))?!=?-1)?{
????????????????writer.write(buffer,?0,?bytesRead);
????????????}
????????????writer.flush();
????????????writer.close();
????????????in.close();
????????????file.destroy();
????????}?catch?(Exception?e)?{
????????????e.printStackTrace();
????????}
????????return?file.getFileName();
????}