java - JasperReports 在 java swing 中很慢

Question

执行此代码需要近 30 秒才能显示。

DefaultJasperReportsContext context = DefaultJasperReportsContext.getInstance();
JRPropertiesUtil.getInstance(context).setProperty("net.sf.jasperreports.xpath.executer.factory",
        "net.sf.jasperreports.engine.util.xml.JaxenXPathExecuterFactory");

button.addActionListener(new ActionListener() {

    public void actionPerformed(ActionEvent arg0) {
        String driverName = "com.mysql.jdbc.Driver";
        String connection_string = "jdbc:mysql://localhost:3306/nursery";
        String username = "root";
        String password = "";

        Connection connection;
        File file = new File("D:/reports/sowing.jrxml");

        try {
            JasperDesign jasperDesign = JRXmlLoader.load(file);
            Map<String, Object> params = new HashMap<String, Object>();
            params.put("reportTitle", "Hello Report World");
            JasperReport jasperReport = JasperCompileManager.compileReport(jasperDesign);
            System.out.println("IN the window");
            Class.forName(driverName);
            connection = DriverManager.getConnection(connection_string, username, password);
            JasperPrint jasperPrint = JasperFillManager.fillReport(jasperReport, params, connection);
            JasperViewer.viewReport(jasperPrint);
        } catch (Exception e) {
        }
    }
});

有什么解决方案可以尽可能快地执行吗？