Exporting .jasper to .pdf with Java

import java.io.File;
import java.io.FileOutputStream;
import java.sql.Connection;
import java.sql.DriverManager;
import java.util.HashMap;
import java.util.Map;
import net.sf.jasperreports.engine.JasperCompileManager;
import net.sf.jasperreports.engine.JasperExportManager;
import net.sf.jasperreports.engine.JasperFillManager;
import net.sf.jasperreports.engine.JasperPrint;
import net.sf.jasperreports.engine.export.JRPdfExporter;
import net.sf.jasperreports.export.ExporterInput;
import net.sf.jasperreports.export.OutputStreamExporterOutput;
import net.sf.jasperreports.export.SimpleExporterInput;
import net.sf.jasperreports.export.SimpleOutputStreamExporterOutput;
import net.sf.jasperreports.export.SimplePdfExporterConfiguration;
import net.sf.jasperreports.view.JasperViewer;
 
public class JasperReportHelloWorld {
 
    public static void main(String[] args) {
 
        try {
            Class.forName("com.mysql.cj.jdbc.Driver");
 
            String dbURL;
            String username;
            String password;
            if (args.length != 0) {
                dbURL = "jdbc:mysql://" + args[0] + ":" + args[1] + "/" + args[2];
                username = args[3];
                password = args[4];
            } else {
                dbURL = "jdbc:mysql://127.0.0.1:-/-";
                username = "-";
                password = "-";
            }
            System.out.println(dbURL);
            Connection conn = DriverManager.getConnection(dbURL, username, password);
 
            String reportSrcFile = "C:\\Users\\-\\-\\-\\.-\\.JRS_project\\" + args[5];
            String reportCompiledFile = JasperCompileManager.compileReportToFile(reportSrcFile);
 
            Map<String, Object> parameters = new HashMap<String, Object>();
 
            JasperPrint print = JasperFillManager.fillReport(reportCompiledFile, parameters, conn);
 
            JasperViewer.viewReport(print, true);
 
            // String pdfFileName = args[6];
            // JasperExportManager.exportReportToPdfFile(print, pdfFileName);
 
            // File pdf = File.createTempFile("output.", ".pdf");
            // JasperExportManager.exportReportToPdfStream(print, new FileOutputStream(pdf));
 
            File pdf = File.createTempFile("output.", ".pdf");
            FileOutputStream outputStream = new FileOutputStream(pdf);
 
            JRPdfExporter exporter = new JRPdfExporter();
            exporter.setExporterInput((ExporterInput) new SimpleExporterInput(print));
            // File pdf = File.createTempFile("output.", ".pdf");
            // FileOutputStream outputStream = new FileOutputStream(pdf);
            exporter.setExporterOutput((OutputStreamExporterOutput) new SimpleOutputStreamExporterOutput(outputStream));
            SimplePdfExporterConfiguration configuration = new SimplePdfExporterConfiguration();
            configuration.setMetadataAuthor("Willem");
            exporter.setConfiguration(configuration);
            exporter.exportReport();
 
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}