How Can I Download and Open PDF Files Generated by an Action Class Using Ajax?

Retrieve and Open PDF Files Using Ajax

To download and display a PDF file generated by an action class via Ajax, the following approach can be utilized:

In the action class, ensure that the content type is correctly set as "application/pdf" and that the desired file name is specified in the "contentDisposition" attribute:

<code class="java">public String execute() {
    ...
    ...
    File report = signedPdfExporter.generateReport(xyzData, props);

    inputStream = new FileInputStream(report);
    contentDisposition = "attachment=\"" + report.getName() + "\"";
    contentType = "application/pdf";
    return SUCCESS;
}</code>

In the Ajax call, configure the request to handle the stream response effectively:

<code class="javascript">$.ajax({
    type: "POST",
    url: url,
    data: wireIdList,
    cache: false,
    success: function(data) {
        // Convert the response data to a Blob object
        var blob = new Blob([data]);
        // Create a link element to trigger the download
        var link = document.createElement('a');
        link.href = window.URL.createObjectURL(blob);
        // Set the desired file name for download
        link.download = "filename_with_extension.pdf";
        // Simulate a click event to initiate the download
        link.click();
        // Remove the Blob URL once the download completes
        window.URL.revokeObjectURL(blob);
    },
    error: function (XMLHttpRequest, textStatus, errorThrown) {
        alert('Error occurred while opening fax template' + getAjaxErrorString(textStatus, errorThrown));
    }
});</code>

By incorporating this approach, the PDF file generated by the action class can be downloaded and opened successfully using Ajax.

The above is the detailed content of How Can I Download and Open PDF Files Generated by an Action Class Using Ajax?. For more information, please follow other related articles on the PHP Chinese website!