ireport 3.7.4 netbeans 6.9.1将不会执行

Question

我是新来的java和jasperreport。我很难执行一个小报告。我添加了所有必需的jar文件，并没有遇到任何错误。

如何使用netbeans自动生成一个jbutton的“mouseclicked”事件来生成pdf文件？ 以下是我已经从thainetbeans和iREPORT分享到人人教程网站的教程中使用的代码：

import net.sf.jasperreports.engine.*; 
import net.sf.jasperreports.engine.design.*; 
import net.sf.jasperreports.view.*; 
import net.sf.jasperreports.engine.xml.*; 

public class MyiReportViewer extends javax.swing.JFrame { 

    /** Creates new form MyiReportViewer */ 
    final String JDBC = "com.mysql.jdbc.Driver"; 
    final String DB = "jdbc:mysql://localhost/afemdb?user=root&password"; 
    private Connection con; 
    /** Creates new form NewJPanel */ 
    public MyiReportViewer() { 
     initComponents(); 
     try{ 
      Class.forName(JDBC).newInstance(); 
      con =DriverManager.getConnection(DB); 
     } 
     catch(Exception e){ 

     } 
    } 

    /** This method is called from within the constructor to 
    * initialize the form. 
    * WARNING: Do NOT modify this code. The content of this method is 
    * always regenerated by the Form Editor. 
    */ 
    @SuppressWarnings("unchecked") 
    // <editor-fold defaultstate="collapsed" desc="Generated Code">       
    private void initComponents() { 

     jButton1 = new javax.swing.JButton(); 

     setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE); 

     jButton1.setText("jButton1"); 
     jButton1.addMouseListener(new java.awt.event.MouseAdapter() { 
      public void mouseClicked(java.awt.event.MouseEvent evt) { 
       jButton1MouseClicked(evt); 
      } 
     }); 
     jButton1.addActionListener(new java.awt.event.ActionListener() { 
      public void actionPerformed(java.awt.event.ActionEvent evt) { 
       jButton1ActionPerformed(evt); 
      } 
     }); 

     javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane()); 
     getContentPane().setLayout(layout); 
     layout.setHorizontalGroup(
      layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING) 
      .addGroup(layout.createSequentialGroup() 
       .addGap(95, 95, 95) 
       .addComponent(jButton1) 
       .addContainerGap(230, Short.MAX_VALUE)) 
     ); 
     layout.setVerticalGroup(
      layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING) 
      .addGroup(layout.createSequentialGroup() 
       .addGap(72, 72, 72) 
       .addComponent(jButton1) 
       .addContainerGap(205, Short.MAX_VALUE)) 
     ); 

     pack(); 
    }// </editor-fold>       


    private void jButton1MouseClicked(java.awt.event.MouseEvent evt) {          
     // TODO add your handling code here: 
     try{ 
      //JasperDesign jasperDesign = JRXmlLoader.load("C:\\Documents and Settings\\Lelou\\Desktop\\presentation\\InstructorQuestionaire.jrxml"); 
      //JasperReport jasperReport = JasperCompileManager.compileReport(jasperDesign); 
      //JasperViewer.viewReport(jasperPrint, true); 


       JasperReport report = JasperCompileManager.compileReport("C:\\Documents and Settings\\Lelou\\Desktop\\presentation\\InstructorQuestionaire.jrxml"); 
       JasperPrint print = JasperFillManager.fillReport(report, null, con); 
       JRViewer viewer = new JRViewer(print); 
       viewer.setOpaque(true); 
       viewer.setVisible(true); 

      } 
     catch(Exception e){ 

     } 
    }          

    private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {           
      // TODO add your handling code here: 
      // try{ 
      // JasperDesign jasperDesign = JRXmlLoader.load("C:\\Documents and Settings\\Lelou\\Desktop\\presentation\\InstructorQuestionaire.jrxml"); 
      // JasperReport jasperReport = JasperCompileManager.compileReport(jasperDesign); 
      // JasperPrint jasperPrint = JasperFillManager.fillReport(jasperReport, null, con); 
      // JasperViewer.viewReport(jasperPrint, true); 


      //JasperReport report = JasperCompileManager.compileReport("C:\\Documents and Settings\\Lelou\\Desktop\\presentation\\InstructorQuestionaire.jrxml"); 
      //JasperPrint print = JasperFillManager.fillReport(report,null, con); 
      //JRViewer viewer = new JRViewer(print); 
      //viewer.setOpaque(true); 
      //viewer.setVisible(true); 

      // } 
      // catch(Exception e){ 
      //} 
    }           

    /** 
    * @param args the command line arguments 
    */ 
    public static void main(String args[]) { 
     java.awt.EventQueue.invokeLater(new Runnable() { 
      public void run() { 
       new MyiReportViewer().setVisible(true); 
      } 
     }); 
    } 

    // Variables declaration - do not modify      
    private javax.swing.JButton jButton1; 
    // End of variables declaration     

} 

Answer 1

在jButton1ActionPerformed方法添加此。你不需要MouseClickedEvent。

try { 
    URL reportFileURL = getClass().getResource("C:/Documents and Settings/Lelou/Desktop/presentation/InstructorQuestionaire.jrxml"); 
    File reportFile = new File(reportFileURL.toURI()); 
    JasperDesign jasperDesign = JRXmlLoader.load(reportFile); 
    JasperReport jasperReport = JasperCompileManager.compileReport(jasperDesign); 
    JasperPrint jasperPrint = JasperFillManager.fillReport(jasperReport, null, con); 
    JasperViewer jv = new JasperViewer(jasperPrint); 
    JDialog viewer = new JDialog(this, "Batch Report", true); 
    viewer.setBounds(jv.getBounds()); 
    viewer.getContentPane().add(jv.getContentPane()); 
    viewer.setResizable(true); 
    viewer.setIconImage(jv.getIconImage()); 
    viewer.setVisible(true); 
} catch (JRException exc) { 
    System.out.println(exc.getMessage()); 
} catch (URISyntaxException exs) { 
    System.out.println(exs.getMessage()); 
} 

（*）注意路径名中的斜杠。摆脱双反斜线！

这是你们的进口：

import java.io.File; 
import java.net.URISyntaxException; 
import java.net.URL; 
import java.sql.Connection; 
import java.sql.DriverManager; 
import java.sql.SQLException; 
import javax.swing.JDialog; 

import net.sf.jasperreports.engine.JRException; 
import net.sf.jasperreports.engine.JasperCompileManager; 
import net.sf.jasperreports.engine.JasperFillManager; 
import net.sf.jasperreports.engine.JasperReport; 
import net.sf.jasperreports.engine.design.JasperDesign; 
import net.sf.jasperreports.engine.xml.JRXmlLoader; 
import net.sf.jasperreports.view.JasperViewer; 
import net.sf.jasperreports.engine.JasperPrint; 

这里有您需要的库（我用的iReport 4.0.1）：

他们大多是在这里：C：\ Program Files文件\ JasperSoft \ iReport-4.0.1 \ ireport \ modules \ ext

检查您的连接字符串。有疑问请使用此构造函数：

public MyiReportViewer() { 
    initComponents(); 
    try { 
     Class.forName(JDBC); 
     //con =DriverManager.getConnection(DB); 
     try { 
      con = DriverManager.getConnection(
        "jdbc:mysql://localhost:3306/afemdb?useUnicode=true&characterEncoding=UTF-8", 
        "root", "password"); 
     } catch (SQLException e) { 
      System.out.println("Con " + e); 
     } 

    } catch (ClassNotFoundException e) { 
     System.out.println("SQL" + e); 
    } 
} 

如果它仍然不起作用，那么iReport肯定有问题。