上傳文件的改進，vaadin

我想上傳文件到git而不保存在本地磁盤上。我在我的webapp中使用vaadin + java，並從vaadin上傳組件。上傳文件的改進，vaadin

public OutputStream receiveUpload(String filename, String MIMEType) 
{ 
    this.filename = filename; 

    FileOutputStream fos = null; 
    try { 
     // exist any possibility to no saving file in filepath (only push 
     // to git) 
     fos = new FileOutputStream(new File(
       filepath + File.separator + filename)); 
    } catch (Exception e) { 
     // How to omit it, I don't want to save file in filepath... 
     return null; 
    } 

    return fos; 
} 

public void uploadSucceeded(Upload.SucceededEvent event) 
{    
    try { 
     // this method read file from filepath. Exist any possibilty to 
     // transfer file from upload panel to here without saving this 
     // file in filepath ? 
     commitToGit(filepath + File.separator + filename); 
    } catch(Exception e) { 
     e.printStackTrace(); 
    } finally { 
     // removing file from filepath, it is no comfortable for me 
     File file = new File(filepath + File.separator + filename); 
     if (file != null) { 
      file.delete(); 
     }  
    } 
}

來源

2014-07-19 user3328186

您的commitToGit方法必須只提供一個InputStream，您可以將上傳組件的OutputStream管道傳遞給git上傳器的InputStream。 –

您能否提供代碼示例...？我不知道它是如何到達的...... – user3328186

在這裏看到的receiveUpload方法，你設置的上傳文件和你的git的連接器之間的管道管功能

Best way to Pipe InputStream to OutputStream

。然後，uploadSucceeded方法不再需要或可用於清理資源。

來源

2014-07-21 06:33:19

嗯......可能我需要轉換客棧的另一面。我有（FOS）FileOutpuTStream，方法commitToGit（）的第一個方法看起來：私人字節[] readStreamToByteArray（InputStream流） - 所以我需要inputStrea，而不是OutputStream ... – user3328186

http://ostermiller.org/convert_java_outputstream_inputstream.html –

上傳文件的改進，vaadin

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