ireport導出各種格式（pdf,excel,word,html,print）

import java.io.IOException;
import java.io.InputStream;
import java.io.ObjectOutputStream;
import java.io.UnsupportedEncodingException;
import java.lang.reflect.Field;
import java.util.Collection;
import java.util.HashMap;
import java.util.Map;

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

import net.sf.jasperreports.engine.JRDataSource;
import net.sf.jasperreports.engine.JRException;
import net.sf.jasperreports.engine.JRExporter;
import net.sf.jasperreports.engine.JRExporterParameter;
import net.sf.jasperreports.engine.JasperExportManager;
import net.sf.jasperreports.engine.JasperFillManager;
import net.sf.jasperreports.engine.JasperPrint;
import net.sf.jasperreports.engine.JasperReport;
import net.sf.jasperreports.engine.base.JRBaseReport;
import net.sf.jasperreports.engine.data.JRBeanCollectionDataSource;
import net.sf.jasperreports.engine.export.JRHtmlExporter;
import net.sf.jasperreports.engine.export.JRHtmlExporterParameter;
import net.sf.jasperreports.engine.export.JRRtfExporter;
import net.sf.jasperreports.engine.export.JRXlsExporter;
import net.sf.jasperreports.engine.export.JRXlsExporterParameter;
import net.sf.jasperreports.engine.util.JRLoader;

public class JasperExportUtils
{
public static void prepareReport(JasperReport jasperReport, String type) {
/*
* 如果導出的是excel，則需要去掉周圍的margin
*/
if ("excel".equals(type))
try {
Field margin = JRBaseReport.class
.getDeclaredField("leftMargin");
margin.setAccessible(true);
margin.setInt(jasperReport, 0);
margin = JRBaseReport.class.getDeclaredField("topMargin");
margin.setAccessible(true);
margin.setInt(jasperReport, 0);
margin = JRBaseReport.class.getDeclaredField("bottomMargin");
margin.setAccessible(true);
margin.setInt(jasperReport, 0);
Field pageHeight = JRBaseReport.class
.getDeclaredField("pageHeight");
pageHeight.setAccessible(true);
pageHeight.setInt(jasperReport, 2147483647);
} catch (Exception exception) {
}
}

   /**
* 導出excel
*/
public static void exportExcel(JasperPrint jasperPrint,
HttpServletRequest request, HttpServletResponse response) throws IOException, JRException {
/*
* 設置頭信息
*/
response.setContentType("application/vnd.ms-excel");
String fileName = new String("未命名.xls".getBytes("GBK"), "ISO8859_1");
response.setHeader("Content-disposition", "attachment; filename="
+ fileName);

     ServletOutputStream ouputStream = response.getOutputStream();
JRXlsExporter exporter = new JRXlsExporter();
exporter
.setParameter(JRExporterParameter.JASPER_PRINT, jasperPrint);
exporter.setParameter(JRExporterParameter.OUTPUT_STREAM,
ouputStream);
exporter.setParameter(
JRXlsExporterParameter.IS_REMOVE_EMPTY_SPACE_BETWEEN_ROWS,
Boolean.TRUE);
exporter.setParameter(JRXlsExporterParameter.IS_ONE_PAGE_PER_SHEET,
Boolean.FALSE);
exporter.setParameter(
JRXlsExporterParameter.IS_WHITE_PAGE_BACKGROUND,
Boolean.FALSE);
exporter.exportReport();
ouputStream.flush();
ouputStream.close();
}

   /**
* 導出pdf，注意此處中文問題， 1）在ireport的classpath中加入iTextAsian.jar
* 2）在ireport畫jrxml時，pdf font name ：STSong-Light ，pdf encoding ：
* UniGB-UCS2-H
*/
public static void exportPdf(JasperPrint jasperPrint,
HttpServletRequest request, HttpServletResponse response) throws IOException, JRException {
response.setContentType("application/pdf");
String fileName = new String("未命名.pdf".getBytes("GBK"), "ISO8859_1");
response.setHeader("Content-disposition", "attachment; filename="
+ fileName);
ServletOutputStream ouputStream = response.getOutputStream();
JasperExportManager.exportReportToPdfStream(jasperPrint,
ouputStream);
ouputStream.flush();
ouputStream.close();
}

   /**
* 導出html
*/
public static void exportHtml(JasperPrint jasperPrint,
HttpServletRequest request, HttpServletResponse response) throws IOException, JRException {
response.setContentType("text/html");
ServletOutputStream ouputStream = response.getOutputStream();
JRHtmlExporter exporter = new JRHtmlExporter();
exporter.setParameter(
JRHtmlExporterParameter.IS_USING_IMAGES_TO_ALIGN,
Boolean.FALSE);
exporter
.setParameter(JRExporterParameter.JASPER_PRINT, jasperPrint);
exporter.setParameter(JRExporterParameter.CHARACTER_ENCODING,
"UTF-8");
exporter.setParameter(JRExporterParameter.OUTPUT_STREAM,
ouputStream);

     exporter.exportReport();

     ouputStream.flush();
ouputStream.close();
}

   /**
* 導出word
*/
public static void exportWord(JasperPrint jasperPrint,
HttpServletRequest request, HttpServletResponse response)
throws JRException, IOException {
response.setContentType("application/msword;charset=utf-8");
String fileName = new String("未命名.doc".getBytes("GBK"), "ISO8859_1");
response.setHeader("Content-disposition", "attachment; filename="
+ fileName);
JRExporter exporter = new JRRtfExporter();
exporter.setParameter(JRExporterParameter.JASPER_PRINT, jasperPrint);
exporter.setParameter(JRExporterParameter.OUTPUT_STREAM, response
.getOutputStream());

    exporter.exportReport();
}

   /**
* 打印
*/
public static void exportPrint(JasperPrint jasperPrint,
HttpServletResponse response, HttpServletRequest request)
throws IOException {
response.setContentType("application/octet-stream");
ServletOutputStream ouputStream = response.getOutputStream();
ObjectOutputStream oos = new ObjectOutputStream(ouputStream);
oos.writeObject(jasperPrint);
oos.flush();
oos.close();
ouputStream.flush();
ouputStream.close();
}

   /**
* 按照類型導出不同格式文件
*
* @param datas
*            數據
* @param type
*            文件類型
* @param is
*            jasper文件的來源
* @param request
* @param response
*/
public static void export(Collection datas, String type, InputStream is,
HttpServletRequest request, HttpServletResponse response) {
try {
JasperReport jasperReport = (JasperReport) JRLoader.loadObject(is);
prepareReport(jasperReport, type);
JRDataSource ds = new JRBeanCollectionDataSource(datas, false);
Map parameters = new HashMap();
JasperPrint jasperPrint = JasperFillManager.fillReport(
jasperReport, parameters, ds);

     if (EXCEL_TYPE.equals(type)) {
exportExcel(jasperPrint, request, response);
} else if (PDF_TYPE.equals(type)) {
exportPdf(jasperPrint, request, response);
} else if (HTML_TYPE.equals(type)) {
exportHtml(jasperPrint, request, response);
} else if (WORD_TYPE.equals(type)) {
exportWord(jasperPrint, request, response);
}
} catch (Exception e) {
e.printStackTrace();
}
}

   public static final String PRINT_TYPE = "print";
public static final String PDF_TYPE = "pdf";
public static final String EXCEL_TYPE = "excel";
public static final String HTML_TYPE = "html";
public static final String WORD_TYPE = "word";