JAVA高级面试进阶训练营视频教程

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　　　　对于jasperreport打印这个功能，遇到了一大堆问题，也只能一点一点解决我：

　　　　1.现在我用的是jasperreport.jar是4.6版本。

　　　　　　(1).因为网上查到：6.0以上版本已经不再支持java打印功能，只能支持页面打印。

　　　　　　(2).如过可以用浏览器打印，那这个打印问题已经解决了

　　　　　　(3).我不想再用5.6版本重新测试一遍了，因为官网给的jasperreport-apples.jar例子里面有很多问题，不想在是一遍

　　　　2.对于程序的需要,：

　　　　　　(1).最好在webapp(根目录)下新建一个applets(自命名)文件夹

　　　　　　(2).applets文件夹放入jre1.6.exe或以上版本,因为jasperreport-4.5是jre1.6写的

　　　　　　(3).从官网的jasperreport-4.6例子中,找到commons-collections.jar、commons-digester.jar、commons-logging.jar，和自己的log4j.jar、log4j-core.jar，放入applets

　　　　3.对于jasperreports-applet-4.6.0.jar，也放入applets，但是等到测试的时候，这个jar包里有很多问题，如果提示这个class找不到，就从jasperreoprt-4.6.jar中粘进去

　　　　　　创建jar包

　　　　　　(1).官网给的例子jasperreport-applets-4.6.jar解压后，复制default.jasperreports.properties、net,新建文件夹，粘进去

　　　　　　(2).将缺少的class从jasperreport-4.6.jar粘到你放的位置对应的位置

　　　　　　(3).ctrl+p命令，将default.jasperreports.properties、net生成一个jasperreport-applets-4.6.jar,放入applets

　　　　4.这是我把官网例子改了以后的代码

　　

import net.sf.jasperreports.engine.JasperPrint;
import net.sf.jasperreports.engine.JasperPrintManager;
import net.sf.jasperreports.engine.util.JRLoader;

import javax.swing.*;
import java.io.PrintWriter;
import java.io.StringWriter;
import java.net.URL;

/**
 * Created by 朱星翰 on 2017/9/14.
 */
public class JRPrinterApplet extends javax.swing.JApplet {
    private URL url;
    private JasperPrint jasperPrint;

    public JRPrinterApplet(){

    }
    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, "REPORT_URL:不能为空！");
        }
    }
    @Override
    public void start() {
        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, "报表是空的！");
            }
        }
        else {
            JOptionPane.showMessageDialog(this, "REPORT_URL:不能为空！");
        }
    }
}

import net.sf.jasperreports.engine.JasperPrint;
import net.sf.jasperreports.engine.util.JRLoader;

import javax.swing.*;
import java.io.PrintWriter;
import java.io.StringWriter;
import java.net.URL;

/**
 * Created by 朱星翰 on 2017/9/14.
 */
public class JRViewApplet  extends javax.swing.JApplet {

    private URL url;
    private JasperPrint jasperPrint;

    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, "REPORT_URL:不能为空！");
        }
    }

    @Override
    public void start() {
        // Add your handling code here:
        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, "报表是空的！");
                }
            }catch (Exception e) {
                StringWriter swriter = new StringWriter();
                PrintWriter pwriter = new PrintWriter(swriter);
                e.printStackTrace(pwriter);
                JOptionPane.showMessageDialog(this, swriter.toString());
            }
        } else {
            JOptionPane.showMessageDialog(this, "REPORT_URL:不能为空！");
        }
    }
}

/*
 * JasperReports - Free Java Reporting Library.
 * Copyright (C) 2001 - 2011 Jaspersoft Corporation. All rights reserved.
 * http://www.jaspersoft.com
 *
 * Unless you have purchased a commercial license agreement from Jaspersoft,
 * the following license terms apply:
 *
 * This program is part of JasperReports.
 *
 * JasperReports is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * JasperReports is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with JasperReports. If not, see <http://www.gnu.org/licenses/>.
 */
import javax.swing.JButton;
import javax.swing.JOptionPane;

import net.sf.jasperreports.engine.JRException;
import net.sf.jasperreports.engine.JasperPrint;
import net.sf.jasperreports.view.JRViewer;


/**
 * @author Teodor Danciu (teodord@users.sourceforge.net)
 * @version 4.6.0
 */
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.");
    }*/


}

/*
 * JasperReports - Free Java Reporting Library.
 * Copyright (C) 2001 - 2011 Jaspersoft Corporation. All rights reserved.
 * http://www.jaspersoft.com
 *
 * Unless you have purchased a commercial license agreement from Jaspersoft,
 * the following license terms apply:
 *
 * This program is part of JasperReports.
 *
 * JasperReports is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * JasperReports is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with JasperReports. If not, see <http://www.gnu.org/licenses/>.
 */
import net.sf.jasperreports.engine.JRException;
import net.sf.jasperreports.engine.JasperPrint;
import net.sf.jasperreports.view.JRViewer;


/**
 * @author Teodor Danciu (teodord@users.sourceforge.net)
 * @version 4.6.0
 */
public class JRViewerSimple extends JRViewer {

    /**
     *
     */
    public JRViewerSimple(JasperPrint jrPrint) throws JRException {
        super(jrPrint);
        tlbToolBar.remove(btnSave);
        tlbToolBar.remove(btnReload);
    }

}

/*
 * JasperReports - Free Java Reporting Library.
 * Copyright (C) 2001 - 2011 Jaspersoft Corporation. All rights reserved.
 * http://www.jaspersoft.com
 *
 * Unless you have purchased a commercial license agreement from Jaspersoft,
 * the following license terms apply:
 *
 * This program is part of JasperReports.
 *
 * JasperReports is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * JasperReports is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with JasperReports. If not, see <http://www.gnu.org/licenses/>.
 */
import java.applet.AppletContext;
import java.awt.BorderLayout;
import java.net.MalformedURLException;
import java.net.URL;

import javax.swing.JOptionPane;

import net.sf.jasperreports.engine.JRException;
import net.sf.jasperreports.engine.JRPrintHyperlink;
import net.sf.jasperreports.engine.JasperPrint;
import net.sf.jasperreports.view.JRHyperlinkListener;

/**
 * @author Teodor Danciu (teodord@users.sourceforge.net)
 * @version 4.6.0
 */
public class ViewerFrame extends javax.swing.JFrame implements JRHyperlinkListener {

    private AppletContext appletContext;

    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.getHyperlinkTypeValue()) {
            case REFERENCE : {
                try {
                    this.appletContext.showDocument(new URL(hyperlink.getHyperlinkReference()), "_blank");
                } catch (MalformedURLException e) {
                    JOptionPane.showMessageDialog(this, e.getMessage());
                }
                break;
            }
            case LOCAL_ANCHOR :
            case LOCAL_PAGE : {
                break;
            }
            case REMOTE_ANCHOR :
            case REMOTE_PAGE : {
                JOptionPane.showMessageDialog(this, "Implement your own JRHyperlinkListener to manage this type of event.");
                break;
            }
            case NONE :
            default : {
                break;
            }
        }
    }

    /** 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.
     */
    private void initComponents() {//GEN-BEGIN:initComponents
        pnlMain = new javax.swing.JPanel();

        setTitle("预览");
        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();
        int width=1000;
        int height=800;
        setSize(new java.awt.Dimension(width, height));
        setLocation((screenSize.width-width)/2,(screenSize.height-height)/2);
    }//GEN-END:initComponents

    // Variables declaration - do not modify//GEN-BEGIN:variables
    private javax.swing.JPanel pnlMain;
    // End of variables declaration//GEN-END:variables

}

　　　　　　(1).把这些代码放入src下，生成class代码

　　　　　　(2).将class生成jar，我命名print.jar

　　　　　　(3).jar -cvf print.jar *.class  (生成jar包)，放入applets

　　　　　5.签名　　　　

　　　　　　1.创建一个证书
　　　　　　keytool -genkey -validity 1800 -keystore applet.store -alias applet  
　　　　　　2.导出证书文件
　　　　　　keytool -export -keystore applet.store -alias applet -file applet.cer
　　　　　　3.对jar包进行签名

　　　　　　jarsigner -keystore applet.store jasperreports-applet-4.6.0.jar applet
　　　　　　

　　　　　　jarsigner -keystore applet.store print.jar applet (注意：必须签名这个jar包，要不然打印报错)

　　　　　6.页面，自己处理了很多js，

　　　　　　

　　　　　　　<a title="打印" onclick="is_ie('JRPrinterApplet')"><img src="${ctx}/static/Images/print.jpg" alt=""></a>
            &nbsp;&nbsp;
            <a title="预览" onclick="is_ie('JRViewApplet')" ><img src="${ctx}/static/Images/look.png" alt=""></a></a>
            &nbsp;&nbsp;
            <a title="更方便的使用打印功能" style="font-size: 11px" href="${ctx}/applets/applet.cer">是否安装安全证书？</a>

function is_ie(str){
        if ((navigator.userAgent.indexOf('MSIE') >= 0 && navigator.userAgent.indexOf('Opera') < 0)||(navigator.userAgent.indexOf("Trident") > -1 && navigator.userAgent.indexOf("rv") > -1)){
            var archive='print.jar,jasperreports-applet-4.6.0.jar,commons-logging-1.1.1.jar,commons-collections-2.1.1.jar,commons-digester-2.1.jar';
            var REPORT_URL='${ctx}/jasper/all_printJasper?';
            var codebase='${ctx}/applets'
            var file='${ctx}/applets/jre-6u45-windows-i586.exe';
            var scriptable=false
            var type='application/x-java-applet;version=1.6.0';

            $.each(args,function(key,value){
                REPORT_URL+=key+"="+value+"&";
            });
            REPORT_URL=change(REPORT_URL);
            REPORT_URL=encodeURI(REPORT_URL);

            var write='正在处理'+(str=='JRPrinterApplet'?'打印':'预览')+'...' +
                    '<object classid="clsid:8AD9C840-044E-11D1-B3E9-00805F499D93" width = "0" height = "0"  codebase="'+file+'" mayscript>' +
                    '<param name = "code" value = "'+str+'.class" >' +
                    '<param name = "codebase" value = "'+codebase+'" >' +
                    '<param name = "archive" value = "'+archive+'" >' +
                    '<param name="type" value="'+type+'">' +
                    '<param name="scriptable" value="'+scriptable+'">' +
                    '<param name = "REPORT_URL" value ="'+REPORT_URL+'">' +
                    '<comment>' +
                    '<embed type="'+type+'" code="'+str+'.class" java_codebase="'+codebase+'" archive="'+archive+'" scriptable='+scriptable+' pluginspage="'+file+'" >' +
                    '<noembed></noembed>' +
                    '</embed>' +
                    '</comment>' +
                    '</object>'
            document.write(write);
        }else {
            alert('预览打印仅支持ie浏览器')
        }
    }

 

最后，终于完成了，总之，觉的jasperreport-applets-4.6官网给的好多错误地方，只有慢慢去找问题