Python app to run JasperReport libraries - i.e. no JasperServer

Question

I\'m looking to try and run Jasper reports (that have been written in iReports and exported to xml) from within a python application, without having to communicate with a Jasper

Answer 1

I used py4j. I had to write a small program in java. Using this as an example, it was simple.

It was more difficult to configure the build environment and put all the dependencies for printing qr-codes.

Python example:

    from py4j.java_gateway import JavaGateway
    gateway = JavaGateway()
    gateway.entry_point.pdf_from_json('e:/test.jasper', 'e:/test.json', 'e:/test.pdf')

Java example:

package jasper4py;

import py4j.GatewayServer;

import java.io.IOException;
import java.util.HashMap;
import java.util.Map;

import net.sf.jasperreports.engine.JRException;
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.data.JsonDataSource;
import net.sf.jasperreports.engine.util.JRLoader;

public class JasperEntryPoint {

    public static void main(String[] args) {
        GatewayServer gatewayServer = new GatewayServer(new JasperEntryPoint());
        gatewayServer.start();
        System.out.println("Gateway Server Started");
    }

    public void pdf_from_json(String report, String data, String result) throws JRException, IOException {
        Map parameters = new HashMap();
        JsonDataSource dataSource = new JsonDataSource(JRLoader.getLocationInputStream(data));
        JasperPrint jasperPrint = JasperFillManager.fillReport(report, parameters, dataSource);
        JasperExportManager.exportReportToPdfFile(jasperPrint, result);
    }
}