打印资料

来源：互联网发布：软件导刊版面费编辑：程序博客网时间：2024/04/28 10:08

http://www.oschina.net/question/1014681_124891

http://bulktree.iteye.com/blog/929650

package com.ly.jasper.one;

import java.applet.Applet;
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 JRPrinterApplet extends Applet {
private static final long serialVersionUID = 1L;

private URL url = null;
private JasperPrint jasperPrint = null;

public JRPrinterApplet()
{

}

/**
*
*/
public void init()
{
String strUrl = "http://localhost:8080/JSPER/servlet/JRPrintServlet";
if (strUrl != null)
{
try
{
URL urll = new URL(strUrl);
url = urll;
}
catch (Exception e)
{
StringWriter swriter = new StringWriter();
PrintWriter pwriter = new PrintWriter(swriter);
e.printStackTrace(pwriter);
JOptionPane.showMessageDialog(this, swriter.toString());
}
}
else
{
JOptionPane.showMessageDialog(this, "init():Source URL not specified");
}
}

public void start() {
if (url != null)
{
if (jasperPrint == null)
{
try
{
System.out.println("进入start方法，即将下载文件");
jasperPrint = (JasperPrint)JRLoader.loadObject(url);
System.out.println("进入start方法，下载文件完毕");
}
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
{
System.out.println("进入start方法，即将打印文件");
JasperPrintManager.printReport(print, true);
System.out.println("进入start方法，打印文件完毕");
}
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, "Empty report.");
}
}
else
{
JOptionPane.showMessageDialog(this, "start():Source URL not specified");
}
}
}

package com.ly.jasper.one;

import java.io.File;
import java.io.IOException;
import java.io.ObjectOutputStream;
import java.util.HashMap;
import java.util.Map;

import javax.servlet.ServletException;
import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import net.sf.jasperreports.engine.JREmptyDataSource;
import net.sf.jasperreports.engine.JasperCompileManager;
import net.sf.jasperreports.engine.JasperFillManager;
import net.sf.jasperreports.engine.JasperPrint;
import net.sf.jasperreports.engine.JasperReport;
import net.sf.jasperreports.engine.util.JRLoader;

public class JRPrintServlet extends HttpServlet
{
private static final long serialVersionUID = 1L;

public void doGet(HttpServletRequest request, HttpServletResponse response ) throws IOException, ServletException
{
try{
String fileName=this.getClass().getClassLoader().getResource("").getFile()+"templet/JTest.jasper";
JasperReport jasperReport= (JasperReport) JRLoader.loadObject(new File(fileName));

Map<String,Object> paramMap=new HashMap<String, Object>();
paramMap.put("empName", "hehe");

JasperPrint jpt = JasperFillManager.fillReport(jasperReport,paramMap,new JREmptyDataSource());//填充报表数据生成JasperPrint对象

response.setContentType("application/octet-stream");
ServletOutputStream ouputStream = response.getOutputStream();
ObjectOutputStream oos = new ObjectOutputStream(ouputStream);
oos.writeObject(jpt);
oos.flush();
oos.close();
} catch (Exception e) {
e.printStackTrace();
}
}
}

function loadApplet(applet_URL) {
var URL = "<%=request.getContextPath()%>/applets/jre-1_5_0_18-windows-i586-p.exe";
document.write('<OBJECT id="myApplet" name="myApplet"');
document.write('classid="clsid:8AD9C840-044E-11D1-B3E9-00805F499D93" WIDTH="0" HEIGHT="0" MAYSCRIPT name="myApplet"');
document.write('codebase="">');
document.write('<PARAM NAME="CODE" VALUE="com.ly.jasper.one.JRPrinterApplet" />');
document.write('<PARAM NAME="CODEBASE" VALUE="../applets" />');
document.write('<PARAM NAME="ARCHIVE" VALUE="jasperreports-applet-5.2.0.jar" />');
document.write('<PARAM NAME="type" VALUE="application/x-java-applet;version=1.5.0" />');
document.write('<PARAM NAME="scriptable" VALUE="false" />');
document.write('<PARAM NAME="REPORT_URL" VALUE="../servlet/JRPrintServlet">');
document.write('no support java');
document.write('<comment>');
document.write('<embed type="application/x-java-applet;version=1.5.0"');
document.write('CODE="com.ly.jasper.one.JRPrinterApplet"');
document.write('JAVA_CODEBASE="applets" ARCHIVE="jasperreports-applet-5.2.0.jar"');
document.write('scriptable=false');
document.write('pluginspage='+ URL +'>');
document.write('<noembed></noembed>');
document.write('</embed>');
document.write('</comment>');
document.write('</OBJECT>');
}

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