java中的Jasper报告中只显示一次数据

Question

i am creating jasper report for view the student details. i have a textfield if the enter correct student id relavent student details display on the jsper report below. i called the jsper report inside the jpanel.

if i enter first time student id 3 it displayed result success then if i enter the second time student id 4 the same result shown. i don't know why.

  HashMap a = new HashMap();
        a.put("id", txtno.getText());

        try {

        JasperDesign jdesign = JRXmlLoader.load("C:\\Users\\kobinath\\Documents\\NetBeansProjects\\JavaApplication138\\src\\report1.jrxml");
        JasperReport jreport = JasperCompileManager.compileReport(jdesign);        
        JasperPrint jprint = JasperFillManager.fillReport(jreport, a, con);
         //  JasperViewer.viewReport(jprint);
         JRViewer vw=new JRViewer(jprint); 
         jPanel1.setLayout(new BorderLayout());
         jPanel1.repaint();

         jPanel1.add(vw);
         jPanel1.revalidate();



        } catch (JRException ex) {

        }

Answer 1

I think that revalidate() alone isn't enough to refresh the panel. You may reference to this link to make sure that repaint() is better to be called. I hope this helps you solve your problem.

PS You can swap the two lines before the last line.