保存時上傳？

我想要一種方式來保存圖片，當我點擊按鈕保存使用上傳組件vaadin7。上傳組件有一個按鈕來發送圖像，但我想保存，當我點擊按鈕保存我的窗口與我定義的名稱。保存時上傳？

我正在試着這個。

//upload image 
Upload upload = new Upload("Choose your picture"); 
upload.setButtonCaption(null); 
mainLayout.addComponent(upload); 

Button btnSave = new Button("Save"); 
btnSave.addClickListener(new Button.ClickListener() { 
    @Override 
    public void buttonClick(ClickEvent event) { 
     //click to save all fields and picture choosed in upload 

    } 
}); 


/** upload image picture */ 
public class ImageUpload implements Receiver{ 
    private File file; 
    private String cpf; // image's name example 222.333.444-55 

    /** save image picture */ 
    @Override 
    public OutputStream receiveUpload(String filename, String mimeType) {  
     FileOutputStream fos = null;   
     try{ 
      if(new File(filename).getName().endsWith("jpg")){ 
       String cpfFormato = this.cpf.replaceAll("\\.", "").replace("-", ""); 
       String[] imagem = filename.split("\\."); 
       String novaImagem = cpfFormato + ".jpg"; //22233344455.jpg 
       file = new File(novaImagem); 
       fos = new FileOutputStream("/tmp/" + file);    
      }else{ 
       new Notification("Erro de arquivo \n", 
          "Only jpg", 
           Notification.Type.ERROR_MESSAGE) 
          .show(Page.getCurrent()); 
      }   
     }catch(FileNotFoundException ex){ 
      new Notification("File not found \n", 
           ex.getLocalizedMessage(), 
           Notification.Type.ERROR_MESSAGE) 
           .show(Page.getCurrent()); 
      return null; 
     } 
     return fos; 
    } 

}

任何想法？

來源

2013-12-11 FernandoPaiva