iReport3.7.1 java打印报表（二）

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上一篇总结了iReport的报表格式制作。接下来通过一个java实例来讲报表打印成pdf格式。然后我们就可以举一反三完成其他格式类型的报表了！
纠错
在设计报表时，需要将显示汉字的部分设置成汉字格式，否则在预览界面不会显示数据。具体的设置如下
编码修改

1、界面效果
首先，上图看下报表打印的效果
打印报表
报表预览
2、导入所依赖的jar包
工程目录
所需jar包http://download.csdn.net/detail/u011521890/9567022
据我所了解，iReport应该为不同的格式的报表提供了不同的jar包
例如（导出pdf需要依赖groovy-all-1.7.5.jar，导出Execle需要依赖poi-3.5-FINAL-20090928.jar ）
3、Servlet的实现

package servlet;import java.io.File;import java.io.IOException;import java.util.HashMap;import java.util.List;import java.util.Map;import javax.servlet.ServletContext;import javax.servlet.ServletException;import javax.servlet.ServletOutputStream;import javax.servlet.annotation.WebServlet;import javax.servlet.http.HttpServlet;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;import dao.StudentDao;import impl.StudentImpl;import net.sf.jasperreports.engine.JRException;import net.sf.jasperreports.engine.JRExporterParameter;import net.sf.jasperreports.engine.JasperFillManager;import net.sf.jasperreports.engine.JasperPrint;import net.sf.jasperreports.engine.JasperReport;import net.sf.jasperreports.engine.data.JRBeanCollectionDataSource;import net.sf.jasperreports.engine.export.JRPdfExporter;import net.sf.jasperreports.engine.util.FileBufferedOutputStream;import net.sf.jasperreports.engine.util.JRLoader;import po.Student;/** * Servlet implementation class IReportSer */@WebServlet("/IReportSer")public class IReportSer extends HttpServlet {    private static final long serialVersionUID = 1L;    /**     * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)     */    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {        System.out.println("1、打印报表...");        ServletContext servletContext = this.getServletConfig().getServletContext();        File reportFile = new File(servletContext.getRealPath("/jasper/report1.jasper"));        Map<String, String> parameters = new HashMap<>();        StudentDao sd = new StudentImpl();        List<Student> stuList = null;        try {            stuList = sd.findAllStudent();        } catch (Exception e1) {            e1.printStackTrace();        }        try {            JasperReport stuJasperReport = (JasperReport) JRLoader.loadObject(reportFile.getPath());            //将集合对象数据，放入到JasperReport中            JasperPrint jasperPrint = JasperFillManager.fillReport(stuJasperReport,                    parameters,new JRBeanCollectionDataSource(stuList,false));            if(jasperPrint!=null){                FileBufferedOutputStream fbos = new FileBufferedOutputStream();                JRPdfExporter exporter = new JRPdfExporter();                exporter.setParameter(JRExporterParameter.OUTPUT_STREAM, fbos);                exporter.setParameter(JRExporterParameter.JASPER_PRINT, jasperPrint);                exporter.exportReport();                fbos.close();                if(fbos.size()>0){                    response.setContentType("application/pdf");                    response.setContentLength(fbos.size());                    ServletOutputStream outputStream = response.getOutputStream();                    fbos.writeData(outputStream);                    fbos.dispose();                    outputStream.flush();                    if(null!= outputStream){                        outputStream.close();                    }                }            }        } catch (JRException e) {            e.printStackTrace();        }    }    /**     * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)     */    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {        // TODO Auto-generated method stub        doGet(request, response);    }}

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