Java

Attach a File to an Email

Demonstrates the Chilkat Email.AddFileAttachment method, which attaches a file read from the filesystem. It returns the content type Chilkat assigned to the attachment (inferred from the file extension). This example attaches a PDF and prints its detected content type.

Background: Each attachment carries a Content-Type (MIME type) such as application/pdf or image/png that tells the receiving client how to handle it. Chilkat gets this from the file's extension. Because attachment bytes are binary, they are Base64-encoded for transport, which is handled automatically — you simply point AddFileAttachment at a path and the file is read, encoded, and packaged into the message.

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Java

import com.chilkatsoft.*;

public class ChilkatExample {

  static {
    try {
        System.loadLibrary("chilkat");
    } catch (UnsatisfiedLinkError e) {
      System.err.println("Native code library failed to load.\n" + e);
      System.exit(1);
    }
  }

  public static void main(String argv[])
  {
    //  Demonstrates the AddFileAttachment method, which attaches a file read from the
    //  filesystem.  It returns the content type Chilkat assigned to the attachment (based on
    //  the file extension), or returns failure if the file could not be read.

    CkEmail email = new CkEmail();
    email.put_Subject("Email with a file attachment");
    email.put_Body("Please see the attached file.");

    //  Attach a file.  The return value is the auto-detected content type.
    String contentType = email.addFileAttachment("qa_data/attachments/report.pdf");
    if (email.get_LastMethodSuccess() == false) {
        System.out.println(email.lastErrorText());
        return;
        }

    System.out.println("Attached content type = " + contentType);
    System.out.println("NumAttachments = " + email.get_NumAttachments());

    //  Note: The path "qa_data/attachments/report.pdf" is a relative local filesystem path,
    //  relative to the current working directory of the running application.
  }
}