Javascript on page JSF - PrimeFace

Question

Javascript on page JSF - PrimeFace

Navigation

#1 by (2 votes)

0

HTML code - JAVASCRIPT It read a txt file from the computer and puts its value into an html input

<input type="file" id="files" name="files[]" multiple />
<input type="text" required name="txtstart" style="width:150px" value="">

<script>
  function handleFileSelect(evt) {
    var files = evt.target.files; // FileList object
    var saida = "";
    // Loop through the FileList and render image files as thumbnails.
    for (var i = 0, f; f = files[i]; i++) {

      var reader = new FileReader();

      // Closure to capture the file information.
      reader.onload = (function(theFile) {
        return function(e) {
          // Render thumbnail.
          saida+=e.target.result;
          document.querySelector("[name='txtstart']").value = saida;
        };
      })(f);

      // Read in the image file as a data URL.
      reader.readAsBinaryString(f);
    }
  }

  document.getElementById('files').addEventListener('change', handleFileSelect, false);
</script>

I want to put this same logic in primeface, but I can not seem to get the selected file into a p: inputTextarea tried to do the same in the HTML without the p: but even so javascript does not run.

In short, I need to read a file from the computer and put its value inside the component below:

<p:inputTextarea value="#{polylinesView.texto}" rows="7" cols="20"
                                     scrollHeight="10" />

javascript java jsf java-ee primefaces

asked by anonymous 09.03.2016 / 04:02

1 answer

How to change google cache for reformulated site Export Blogger Images to Wordpress [closed]

score 2 · Accepted Answer

Uploading files using primefaces usually uses the file upload component. Here is an example of how it could be written:

<h:form>
<p:fileUpload value="#{beanController.arquivoAula}" sizeLimit="20971520" invalidSizeMessage="Somente são aceitos arquivos de até 20MB"
                    label="Selecionar arquivo" cancelLabel="Cancelar" allowTypes="/(\.|\/)(txt)$/" 
                    invalidFileMessage="Somente são aceitos arquivos dos tipos: txt " 
                    fileUploadListener="#{beanController.handleFileUpload}" process="@form" update="@form" />

                    <p:inputTextarea value="#{cursoController.campoTextArea}">

                    </p:inputTextarea>
</h:form>

The handleFileUpload method should be implemented in your managedbean similar to the one below:

public void handleFileUpload(FileUploadEvent event){
    UploadedFile file = event.getFile();

    byte[] contents = event.getFile().getContents();
    String dados = new String(contents);
    this.campoTextArea = dados;
}

Once the file has been uploaded the data will be read and added in the String campoTextArea that is associated with the textarea in the form.

Follow the fileupload documentation link: link