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Hi I am trying to learn jexcel api if I am running it through a main class its actually working and generating the excel file however if I put in maven plugin I cannot find the generated excel anymore I am not getting error it keeps saying excel generated but there is none. If possible I wanted to ask for suggestion how to like store the file in variable or temporary directory then call it as attachment to email? Is it possible? Because I dont really need to store it I just need to call the generated file to attach in my email

       try{

           //*** for Database Connected ***//
            Connection connect = null;
            Statement s = null;

            Class.forName("com.mysql.jdbc.Driver");
            connect =  DriverManager.getConnection("jdbc:mysql://localhost/mydatabase" +
                    "?user=root&password=root");

            s = connect.createStatement();

            String sql = "SELECT * FROM  customer ORDER BY CustomerID ASC";

            ResultSet rec = s.executeQuery(sql);



            //*** for Excel Report ***//
            String fileName = "C:\\java\\myExcel.xls";

            WritableWorkbook workbook = Workbook.createWorkbook(new File(fileName));

            //*** Create Font ***//
            WritableFont fontBlue = new WritableFont(WritableFont.TIMES, 10);
            fontBlue.setColour(Colour.BLUE);

            WritableFont fontRed = new WritableFont(WritableFont.TIMES, 10);
            fontRed.setColour(Colour.RED);




            //*** Sheet 1 ***//
            WritableSheet ws1 = workbook.createSheet("mySheet1", 0);


            //*** Header ***//
            WritableCellFormat cellFormat1 = new WritableCellFormat(fontRed);
            //cellFormat2.setBackground(Colour.ORANGE);
            cellFormat1.setAlignment(Alignment.CENTRE);
            cellFormat1.setVerticalAlignment(VerticalAlignment.CENTRE);
            cellFormat1.setBorder(Border.ALL, BorderLineStyle.THIN);


            //*** Data ***//
            WritableCellFormat cellFormat2 = new WritableCellFormat(fontBlue);
           // cellFormat2.setWrap(true);
            cellFormat2.setAlignment(jxl.format.Alignment.CENTRE);
            cellFormat2.setVerticalAlignment(VerticalAlignment.CENTRE);
            cellFormat2.setWrap(true);
            cellFormat2.setBorder(jxl.format.Border.ALL, jxl.format.BorderLineStyle.HAIR,
            jxl.format.Colour.BLACK);

            ws1.mergeCells(0, 0, 5, 0);
            Label lable = new Label(0, 0,"Customer Report", cellFormat1);
            ws1.addCell(lable);

            //*** Header ***//
            ws1.setColumnView(0, 10); // Column CustomerID
            ws1.addCell(new Label(0,1,"CustomerID",cellFormat1));

            ws1.setColumnView(1, 15); // Column Name
            ws1.addCell(new Label(1,1,"Name",cellFormat1));

            ws1.setColumnView(2, 25); // Column Email
            ws1.addCell(new Label(2,1,"Email",cellFormat1));

            ws1.setColumnView(3, 12); // Column CountryCode
            ws1.addCell(new Label(3,1,"CountryCode",cellFormat1));

            ws1.setColumnView(4, 10); // Column Budget
            ws1.addCell(new Label(4,1,"Budget",cellFormat1));

            ws1.setColumnView(5, 10); // Column Used
            ws1.addCell(new Label(5,1,"Used",cellFormat1));

            int iRows = 2;
            while((rec!=null) && (rec.next()))
            {    
                ws1.addCell(new Label(0,iRows,rec.getString("CustomerID"),cellFormat2));
                ws1.addCell(new Label(1,iRows,rec.getString("Name"),cellFormat2));
                ws1.addCell(new Label(2,iRows,rec.getString("Email"),cellFormat2));
                ws1.addCell(new Label(3,iRows,rec.getString("CountryCode"),cellFormat2));
                ws1.addCell(new Label(4,iRows,rec.getString("Budget"),cellFormat2));
                ws1.addCell(new Label(5,iRows,rec.getString("Used"),cellFormat2));
                ++iRows;
            }

            workbook.write();
            workbook.close();

            System.out.println("Excel file created.");

            // Close
            try {
                if(connect != null){
                    s.close();
                    connect.close();
                }
            } catch (SQLException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }   

        }
        catch (Exception e) {
            e.printStackTrace();
        }

    }


   }
Wonderer
  • 65
  • 8

1 Answers1

2

jexcelapi 2.4.2

javax.mail 1.4.7

you could use ByteArrayOutputStream to attach the file to your email

import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.Properties;

import javax.activation.DataHandler;
import javax.activation.DataSource;
import javax.mail.Message;
import javax.mail.MessagingException;
import javax.mail.Multipart;
import javax.mail.PasswordAuthentication;
import javax.mail.Session;
import javax.mail.Transport;
import javax.mail.internet.AddressException;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeBodyPart;
import javax.mail.internet.MimeMessage;
import javax.mail.internet.MimeMultipart;
import javax.mail.util.ByteArrayDataSource;

import jxl.Workbook;
import jxl.format.Alignment;
import jxl.format.Border;
import jxl.format.BorderLineStyle;
import jxl.format.Colour;
import jxl.format.VerticalAlignment;
import jxl.write.Label;
import jxl.write.WritableCellFormat;
import jxl.write.WritableFont;
import jxl.write.WritableSheet;
import jxl.write.WritableWorkbook;

public class Stack {


    public static void main(String[] args) throws IOException {

        try {

            // *** for Database Connected ***//
            Connection connect = null;
            Statement s = null;

            Class.forName("com.mysql.jdbc.Driver");
            connect = DriverManager.getConnection("jdbc:mysql://localhost/mydatabase?user=root&password=root");

            s = connect.createStatement();

            String sql = "SELECT * FROM customer ORDER BY CustomerID ASC";

            ResultSet rec = s.executeQuery(sql);

            ByteArrayOutputStream baos = new ByteArrayOutputStream();
            WritableWorkbook workbook = Workbook.createWorkbook(baos);

            // *** Create Font ***//
            WritableFont fontBlue = new WritableFont(WritableFont.TIMES, 10);
            fontBlue.setColour(Colour.BLUE);

            WritableFont fontRed = new WritableFont(WritableFont.TIMES, 10);
            fontRed.setColour(Colour.RED);

            // *** Sheet 1 ***//
            WritableSheet ws1 = workbook.createSheet("mySheet1", 0);

            // *** Header ***//
            WritableCellFormat cellFormat1 = new WritableCellFormat(fontRed);
            // cellFormat2.setBackground(Colour.ORANGE);
            cellFormat1.setAlignment(Alignment.CENTRE);
            cellFormat1.setVerticalAlignment(VerticalAlignment.CENTRE);
            cellFormat1.setBorder(Border.ALL, BorderLineStyle.THIN);

            // *** Data ***//
            WritableCellFormat cellFormat2 = new WritableCellFormat(fontBlue);
            // cellFormat2.setWrap(true);
            cellFormat2.setAlignment(jxl.format.Alignment.CENTRE);
            cellFormat2.setVerticalAlignment(VerticalAlignment.CENTRE);
            cellFormat2.setWrap(true);
            cellFormat2.setBorder(jxl.format.Border.ALL, jxl.format.BorderLineStyle.HAIR, jxl.format.Colour.BLACK);

            ws1.mergeCells(0, 0, 5, 0);
            Label lable = new Label(0, 0, "Customer Report", cellFormat1);
            ws1.addCell(lable);

            // *** Header ***//
            ws1.setColumnView(0, 10); // Column CustomerID
            ws1.addCell(new Label(0, 1, "CustomerID", cellFormat1));

            ws1.setColumnView(1, 15); // Column Name
            ws1.addCell(new Label(1, 1, "Name", cellFormat1));

            ws1.setColumnView(2, 25); // Column Email
            ws1.addCell(new Label(2, 1, "Email", cellFormat1));

            ws1.setColumnView(3, 12); // Column CountryCode
            ws1.addCell(new Label(3, 1, "CountryCode", cellFormat1));

            ws1.setColumnView(4, 10); // Column Budget
            ws1.addCell(new Label(4, 1, "Budget", cellFormat1));

            ws1.setColumnView(5, 10); // Column Used
            ws1.addCell(new Label(5, 1, "Used", cellFormat1));

            int iRows = 2;
             while((rec!=null) && (rec.next())) {
                ws1.addCell(new Label(0, iRows, rec.getString("CustomerID"), cellFormat2));
                ws1.addCell(new Label(1, iRows, rec.getString("Name"), cellFormat2));
                ws1.addCell(new Label(2, iRows, rec.getString("Email"), cellFormat2));
                ws1.addCell(new Label(3, iRows, rec.getString("CountryCode"), cellFormat2));
                ws1.addCell(new Label(4, iRows, rec.getString("Budget"), cellFormat2));
                ws1.addCell(new Label(5, iRows, rec.getString("Used"), cellFormat2));
                ++iRows;
             }

            workbook.write();
            workbook.close();

            System.out.println("Excel file created.");

            // Close
            try {
                if (connect != null) {
                    s.close();
                    connect.close();
                }
            } catch (SQLException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }

            sendMail(baos);

        } catch (Exception e) {
            e.printStackTrace();
        }

    }

    private static void sendMail(ByteArrayOutputStream baos) throws AddressException, MessagingException {

        final String username = "your.mail.id@gmail.com";
        final String password = "your.password";

        Properties props = new Properties();
        props.put("mail.smtp.auth", true);
        props.put("mail.smtp.starttls.enable", true);
        props.put("mail.smtp.host", "smtp.gmail.com");
        props.put("mail.smtp.port", "587");
        props.put("protocol", "smtp");

        Session session = Session.getInstance(props, new javax.mail.Authenticator() {
            protected PasswordAuthentication getPasswordAuthentication() {
                return new PasswordAuthentication(username, password);
            }
        });

        Message message = new MimeMessage(session);
        message.setFrom(new InternetAddress("from.mail.id@g_mail.com"));
        message.setRecipients(Message.RecipientType.TO, InternetAddress.parse("to.your.mail@g_mail.com"));
        message.setSubject("Testing Subject");
        message.setText("PFA");

        MimeBodyPart messageBodyPart = new MimeBodyPart();

        Multipart multipart = new MimeMultipart();

        messageBodyPart = new MimeBodyPart();

        String fileName = "attachmentName.xls";
        DataSource aAttachment = new ByteArrayDataSource(baos.toByteArray(), "application/octet-stream");
        messageBodyPart.setDataHandler(new DataHandler(aAttachment));
        messageBodyPart.setFileName(fileName);
        multipart.addBodyPart(messageBodyPart);

        message.setContent(multipart);

        System.out.println("Sending");

        Transport.send(message);

        System.out.println("Done");
    }

}

Sending mail attachment using Java

How to add Attachments to Email in java using outputstream

John
  • 446
  • 6
  • 16
  • Hi really appreciate your help however I am getting this error in my tomcat – Wonderer Sep 14 '18 at 06:50
  • SEVERE [http-nio-443-exec-10] java.lang.ClassCastException: javax.mail.util.ByteArrayDataSource cannot be cast to javax.sql.DataSource – Wonderer Sep 14 '18 at 06:50
  • 1
    @Wonderer, does the error occur while tomcat is starting? if so please add `provided` to your `javax.mail` dependency in pom.xml and restart and redeploy your Tomcat. or delete the `mail.jar` from your application – John Sep 14 '18 at 07:42
  • ok, you want to send xls file to the email and to generate pdf file after that, don't you? please describe – John Sep 14 '18 at 08:44