Is it possible to use jasper report with java to make it like a popup coming in the browser window?

Question

I am using Jasper report with java. I want to make the export file ask for the location to download when launching it as web app.

What i am doing now is. I am giving a path for the file(PDF,DOCX,XLS) to be exported in a location. What i need is, the browser should make a popup and ask for the file location to be downloaded just like firefox.

I've done it in a java application, by providing a path,

Connection conn = null;
    ResultSet rs = null;
    JasperReport jasperReport = null;
    JasperPrint print = null;
    String filename = "Report.pdf";
    String query = "{CALL get_report_data()}";
    try {
        if (conn == null) 
        {
            String hostName = "localhost";
            String dbName = "test";
            String userName = "root";
            String password = "root";
            try {
                Class.forName("com.mysql.cj.jdbc.Driver");
                String connectionURL = "jdbc:mysql://" + hostName + ":3306/" + dbName;
                conn = DriverManager.getConnection(connectionURL, userName, password);
            } catch (Exception e) {
                System.out.println(e);
            }
        }
        CallableStatement cstmt = conn.prepareCall(query);

        rs = cstmt.executeQuery();

        JRResultSetDataSource resultSetDataSource = new JRResultSetDataSource(rs);

        jasperReport = JasperCompileManager
                .compileReport("E:\\Eclipse 2019-03 Workspace\\Report\\static_land_report.jrxml");

        Map<String, Object> parameters = new HashMap<String, Object>();

        print = JasperFillManager.fillReport(jasperReport, parameters, resultSetDataSource);

JasperExportManager.exportReportToPdfFile(print, "E:\Eclipse 2019-03 Workspace\Report\static_land_report.pdf");

Now, i want the above code to be done in web app, and without providing the path.

Answer 1

thanks for reaching out. But, i found a solution.

package com.report.java;

import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.sql.CallableStatement;
import java.sql.Connection;
import java.sql.ResultSet;
import java.util.HashMap;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import net.sf.jasperreports.engine.JRResultSetDataSource;
import net.sf.jasperreports.engine.JasperCompileManager;
import net.sf.jasperreports.engine.JasperFillManager;
import net.sf.jasperreports.engine.JasperPrint;
import net.sf.jasperreports.engine.JasperReport;
import net.sf.jasperreports.engine.export.JRPdfExporter;
import net.sf.jasperreports.export.SimpleExporterInput;
import net.sf.jasperreports.export.SimpleOutputStreamExporterOutput;

public class PdfReportDownload extends HttpServlet {
    private static final long serialVersionUID = 1L;

    public PdfReportDownload() {
        super();
    }

    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        try 
        {
            generatePdfReport(response);
        } 
        catch (Exception e) {
            e.printStackTrace();
        }

    }
    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        doGet(request, response);
    }

    public void generatePdfReport(HttpServletResponse response) 
    {
        try 
        {
            Connection conn=null;
            ResultSet rs=null;
            JasperReport jasperReport = null;
            String query ="{CALL get_report_data()}";
            try 
            {   
                if(conn==null)
                {
                    try 
                    {
                        conn= MySQLConnection.getConnection();

                    } 
                    catch (Exception ex) {
                        ex.printStackTrace();
                    }
                }   
            CallableStatement cstmt = conn.prepareCall(query);

            rs = cstmt.executeQuery();

            JRResultSetDataSource resultSetDataSource = new JRResultSetDataSource(rs);  

            jasperReport = JasperCompileManager.compileReport("E:\\Eclipse 2019-03 Workspace\\Report_Download\\static_land_report.jrxml");
            JasperPrint jasperPrint = JasperFillManager.fillReport(jasperReport, new HashMap <String, Object>(), resultSetDataSource);

            JRPdfExporter pdfExporter = new JRPdfExporter();
            pdfExporter.setExporterInput(new SimpleExporterInput(jasperPrint));
            ByteArrayOutputStream pdfReportStream = new ByteArrayOutputStream();
            pdfExporter.setExporterOutput(new SimpleOutputStreamExporterOutput(pdfReportStream));
            pdfExporter.exportReport();

            response.setContentType("application/pdf");
            response.setHeader("Content-Length", String.valueOf(pdfReportStream.size()));
            response.addHeader("Content-Disposition", "attachment; filename=Report.pdf;");

            OutputStream responseOutputStream = response.getOutputStream();
            responseOutputStream.write(pdfReportStream.toByteArray());
            responseOutputStream.close();
            pdfReportStream.close();
        } 
        catch (Exception e) 
        {
                System.out.println(e);
        }
        }
        catch(Exception e) 
        {
            System.out.println(e);
        }
    }

}

On invoking this servlet, the report gets download