How to upload and save an attachment via XPages Java Bean

Question

I get how you can use Expression Language to bind XPages controls to a Java Bean. Then it accesses the setters and getters automatically.

But how do you handle a fi

Answer 1

I have code that processes an uploaded file in Java. The file is uploaded with the normal fileUpload control and then I call the following Java code from a button (that does a full refresh - so that the document including the uploaded file is saved). In the Java code you can do whatever checks you want (filename, filesize etc.):

public void importFile() {

    facesContext = FacesContext.getCurrentInstance();
    ExternalContext externalContext = facesContext.getExternalContext();

    // get a handle an the uploaded file
    HttpServletRequest request = (HttpServletRequest) externalContext.getRequest();
    String fileUploadID = JSFUtil.findComponent("uploadFile").getClientId(FacesContext.getCurrentInstance());
    UploadedFile uploadedFile = ((UploadedFile) request.getParameterMap().get(fileUploadID));

    if (uploadedFile == null) {
        facesContext.addMessage("messages1", new FacesMessage(FacesMessage.SEVERITY_ERROR, "No file uploaded. Use the file upload button to upload a file.", ""));
        return;
    }

    File file = uploadedFile.getServerFile();

    String fileName = uploadedFile.getClientFileName();

    // Check that filename ends with .txt
    if (!fileName.endsWith(".txt")) {
        facesContext.addMessage("messages1", new FacesMessage(FacesMessage.SEVERITY_ERROR, "Error in uploaded file. The file must end with .txt", ""));
        return;
    }

    try {
        // Open the file
        BufferedReader br;

        br = new BufferedReader(new FileReader(file));
        String strLine;

        // Read File Line By Line
        while ((strLine = br.readLine()) != null) {
            // do stuff with the contents of the file
        }

        // Close the input stream
        br.close();

    } catch (FileNotFoundException e) {
        e.printStackTrace();
    } catch (IOException e) {
        e.printStackTrace();
    } catch (Exception e) {
        facesContext.addMessage("messages1", new FacesMessage(FacesMessage.SEVERITY_ERROR, "Error in uploaded file. Please check format of file and try again", ""));
        return;
    }

    facesContext.addMessage("messages1", new FacesMessage(FacesMessage.SEVERITY_INFO, "File successfully uploaded", ""));
}

With a handle on the file object you can store the file in other documents using embedObject.