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最新评论
-
damoluomu:
简单易懂
Java Web开发Session超时设置 -
di1984HIT:
学习了~~~~~~
Java Web开发Session超时设置 -
lord_is_layuping:
...
Java Web开发Session超时设置 -
15111285554:
...
Java Web开发Session超时设置 -
sfg1314:
暂停后重新下载就会报错:ClientAbortExceptio ...
Java Web 文件下载之断点续传
打印预览与打印的准备工作是一样的,第一,二,三,四,五步请参照:JasperReport+Servlet Web应用之:打印
不同之处在于:我们同样要写一个预览的applet如下:
import java.io.PrintWriter; import java.io.StringWriter; import java.net.URL; import javax.swing.JOptionPane; import net.sf.jasperreports.engine.JasperPrint; import net.sf.jasperreports.engine.JasperPrintManager; import net.sf.jasperreports.engine.util.JRLoader; public class JRViewApplet extends javax.swing.JApplet { private URL url = null; private JasperPrint jasperPrint = null; public JRViewApplet() { } public void init() { String strUrl = getParameter("REPORT_URL"); if (strUrl != null) { try { url = new URL(getCodeBase(), strUrl); } catch (Exception e) { StringWriter swriter = new StringWriter(); PrintWriter pwriter = new PrintWriter(swriter); e.printStackTrace(pwriter); JOptionPane.showMessageDialog(this, swriter.toString()); } } else { JOptionPane.showMessageDialog(this, "Source URL not specified"); } } @Override public void start() { // initComponents(); if (url != null) { try { if (jasperPrint == null) { jasperPrint = (JasperPrint) JRLoader.loadObject(url); } if (jasperPrint != null) { ViewerFrame viewerFrame = new ViewerFrame(this .getAppletContext(), jasperPrint); viewerFrame.show(); } else { JOptionPane.showMessageDialog(this, "空报表!"); } } catch (Exception e) { StringWriter swriter = new StringWriter(); PrintWriter pwriter = new PrintWriter(swriter); e.printStackTrace(pwriter); JOptionPane.showMessageDialog(this, swriter.toString()); } } else { JOptionPane.showMessageDialog(this, "Source URL not specified"); } } private void initComponents() { pnlMain = new javax.swing.JPanel(); btnPrint = new javax.swing.JButton(); btnView = new javax.swing.JButton(); // btnPrint.setText("打印报表"); // btnPrint.addActionListener(new java.awt.event.ActionListener() { // public void actionPerformed(java.awt.event.ActionEvent evt) { // btnPrintActionPerformed(evt); // } // }); // pnlMain.add(btnPrint); btnView.setText("预览报表"); btnView.addActionListener(new java.awt.event.ActionListener() { public void actionPerformed(java.awt.event.ActionEvent evt) { btnViewActionPerformed(evt); } }); pnlMain.add(btnView); getContentPane().add(pnlMain, java.awt.BorderLayout.WEST); } /** * 预览报表 * * @param evt */ protected void btnViewActionPerformed(java.awt.event.ActionEvent evt) { if (url != null) { try { if (jasperPrint == null) { jasperPrint = (JasperPrint) JRLoader.loadObject(url); } if (jasperPrint != null) { ViewerFrame viewerFrame = new ViewerFrame(this .getAppletContext(), jasperPrint); viewerFrame.show(); } else { JOptionPane.showMessageDialog(this, "空报表!"); } } catch (Exception e) { StringWriter swriter = new StringWriter(); PrintWriter pwriter = new PrintWriter(swriter); e.printStackTrace(pwriter); JOptionPane.showMessageDialog(this, swriter.toString()); } } else { JOptionPane.showMessageDialog(this, "Source URL not specified"); } } /** * 打印报表 * * @param evt */ protected void btnPrintActionPerformed(java.awt.event.ActionEvent evt) { if (url != null) { if (jasperPrint == null) { try { jasperPrint = (JasperPrint) JRLoader.loadObject(url); } catch (Exception e) { StringWriter swriter = new StringWriter(); PrintWriter pwriter = new PrintWriter(swriter); e.printStackTrace(pwriter); JOptionPane.showMessageDialog(this, swriter.toString()); } } if (jasperPrint != null) { final JasperPrint print = jasperPrint; Thread thread = new Thread(new Runnable() { public void run() { try { JasperPrintManager.printReport(print, true); } catch (Exception e) { StringWriter swriter = new StringWriter(); PrintWriter pwriter = new PrintWriter(swriter); e.printStackTrace(pwriter); JOptionPane.showMessageDialog(null, swriter .toString()); } } }); thread.start(); } else { JOptionPane.showMessageDialog(this, "空报表!"); } } else { JOptionPane.showMessageDialog(this, "Source URL not specified"); } } private javax.swing.JPanel pnlMain; private javax.swing.JButton btnView; private javax.swing.JButton btnPrint; }
它还需要两个辅助类:如下:
public class JRViewerPlus extends JRViewer { protected JButton btnPlus = new javax.swing.JButton(); public JRViewerPlus(JasperPrint jrPrint) throws JRException { super(jrPrint); tlbToolBar.remove(btnSave); tlbToolBar.remove(btnReload); btnPlus = new javax.swing.JButton(); btnPlus.setToolTipText("Plus..."); btnPlus.setText("Plus..."); btnPlus.setPreferredSize(new java.awt.Dimension(80, 23)); btnPlus.setMaximumSize(new java.awt.Dimension(80, 23)); btnPlus.setMinimumSize(new java.awt.Dimension(80, 23)); btnPlus.addActionListener(new java.awt.event.ActionListener() { public void actionPerformed(java.awt.event.ActionEvent evt) { btnPlusActionPerformed(evt); } }); tlbToolBar.add(btnPlus, 0); } protected void setZooms() { this.zooms = new int[] { 33, 66, 100, 133, 166, 200, 233 }; this.defaultZoomIndex = 2; } protected void btnPlusActionPerformed(java.awt.event.ActionEvent evt) { JOptionPane .showMessageDialog( this, "I just wanted to let you know that you can extend the JRViewer to customize it.\n The button you have pushed was added this way."); } }
public class ViewerFrame extends javax.swing.JFrame implements JRHyperlinkListener { private AppletContext appletContext = null; public ViewerFrame(AppletContext appletContext, JasperPrint jasperPrint) throws JRException { initComponents(); this.appletContext = appletContext; JRViewerPlus viewer = new JRViewerPlus(jasperPrint); viewer.addHyperlinkListener(this); this.pnlMain.add(viewer, BorderLayout.CENTER); } public void gotoHyperlink(JRPrintHyperlink hyperlink) { switch (hyperlink.getHyperlinkType()) { case JRHyperlink.HYPERLINK_TYPE_REFERENCE: { try { this.appletContext.showDocument(new URL(hyperlink .getHyperlinkReference()), "_blank"); } catch (MalformedURLException e) { JOptionPane.showMessageDialog(this, e.getMessage()); } break; } case JRHyperlink.HYPERLINK_TYPE_LOCAL_ANCHOR: case JRHyperlink.HYPERLINK_TYPE_LOCAL_PAGE: { break; } case JRHyperlink.HYPERLINK_TYPE_REMOTE_ANCHOR: case JRHyperlink.HYPERLINK_TYPE_REMOTE_PAGE: { JOptionPane .showMessageDialog(this, "Implement your own JRHyperlinkListener to manage this type of event."); break; } case JRHyperlink.HYPERLINK_TYPE_NONE: default: { break; } } } private void initComponents() { pnlMain = new javax.swing.JPanel(); setTitle("JasperViewer"); setDefaultCloseOperation(javax.swing.WindowConstants.DISPOSE_ON_CLOSE); pnlMain.setLayout(new java.awt.BorderLayout()); getContentPane().add(pnlMain, java.awt.BorderLayout.CENTER); pack(); java.awt.Dimension screenSize = java.awt.Toolkit.getDefaultToolkit() .getScreenSize(); setSize(new java.awt.Dimension(400, 300)); setLocation((screenSize.width - 400) / 2, (screenSize.height - 300) / 2); } private javax.swing.JPanel pnlMain; }
说明:这三个类可以在jasperReport自带的demo中获得,只需做小小的改动就可以了。
同样还需要这三个类的编译后的class文件放到WebRoot/applet下面。将jasperreports-3.5.2-applet.jar,commons-logging-1.0.2.jar,commons-collections-2.1.jar三个包加进去。该applet所需要调用的servlet和servlet配置请见:http://zmx.iteye.com/admin/blogs/572812
页面调用的applet写法或js动态产生applet如下:
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> <title>打印窗口</title> </head> <script language="javascript"> <!-- function openView() { var url = "../JRPrintServlet"; document.write('<APPLET ID="JrPrt" CODE = "JRViewApplet.class" CODEBASE = "applets" ARCHIVE = "jasperreports-3.5.2-applet.jar,commons-logging-1.0.2.jar,commons-collections-2.1.jar" WIDTH = "0" HEIGHT = "0">'); document.write('<PARAM NAME = "type" VALUE="application/x-java-applet;version=1.2.2">'); document.write('<PARAM NAME = "scriptable" VALUE="false">'); document.write('<PARAM NAME = "REPORT_URL" VALUE ="'+url+'">'); document.write('</APPLET>'); } --> </script> <body bgcolor="#FFFFFF"> <input type="button" value="测试预览" onclick="openView();"> <!-- <APPLET CODE="JRViewApplet.class" CODEBASE = "applets" ARCHIVE = "jasperreports-3.5.2-applet.jar,commons-logging-1.0.2.jar,commons-collections-2.1.jar" WIDTH="300" HEIGHT="40"> </XMP> <PARAM NAME=CODE VALUE="JRViewApplet.class"> <PARAM NAME = ARCHIVE VALUE = "jasperreports-3.5.2-applet.jar,commons-logging-1.0.2.jar,commons-collections-2.1.jar" > <PARAM NAME="type" VALUE="application/x-java-applet;version=1.2.2"> <PARAM NAME="scriptable" VALUE="false"> <PARAM NAME="REPORT_URL" VALUE="../JRPrintServlet"> </APPLET> --> </body> </html>
- MyJasperReportWebPrint.rar (528.4 KB)
- 下载次数: 513
- lib2.rar (5.7 MB)
- 下载次数: 551
- lib1.rar (6.6 MB)
- 下载次数: 665
评论
4 楼
hslh22
2015-03-11
org.apache.jasper.JasperException: An exception occurred processing JSP page /jsp/viewer.jsp at line 18
楼主少了包
commons-logging-1.1.1.jar
在网上下一个jar包添加进项目就可以解决了
楼主少了包
commons-logging-1.1.1.jar
在网上下一个jar包添加进项目就可以解决了
3 楼
xietingzi123456
2012-02-16
下载了项目,部署了,跑了, 但是org.apache.jasper.JasperException: An exception occurred processing JSP page /jsp/viewer.jsp at line 18
15: if (!reportFile.exists())
16: throw new JRRuntimeException("File preson.jasper not found. The report design must be compiled first.");
17:
18: JasperReport jasperReport = (JasperReport)JRLoader.loadObject(reportFile.getPath());
19:
20: Map parameters = new HashMap();
21: parameters.put("year", "2009");
报这个错啊。 是不要要加什么文件?
15: if (!reportFile.exists())
16: throw new JRRuntimeException("File preson.jasper not found. The report design must be compiled first.");
17:
18: JasperReport jasperReport = (JasperReport)JRLoader.loadObject(reportFile.getPath());
19:
20: Map parameters = new HashMap();
21: parameters.put("year", "2009");
报这个错啊。 是不要要加什么文件?
2 楼
guzhiwxb
2011-10-18
如果是List<JasperPrint> 如何打印预览
1 楼
veteran123
2010-07-26
正需要,研究一下
发表评论
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jasperReport实现动态列打印
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2010-01-26 17:18 9968构造我们的JavaBean:(get,set方法省略,属性名称 ... -
JasperReport+Servlet Web应用之:导PDF,Excel,Rtf文件
2010-01-17 19:18 4250第一,二,三,四步请参照:JasperReport+Servl ... -
JasperReport+Servlet Web应用之:打印
2010-01-17 18:04 10012关于JasperReport的简介大家可以去google上去查 ...
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