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发表时间:2008-11-12
import java.io.IOException; import java.io.OutputStream; import java.io.PrintWriter; import java.net.URLEncoder; import java.util.List; import java.util.Map; import javax.servlet.ServletException; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import javax.servlet.http.HttpSession; import net.sf.jasperreports.engine.JRAbstractExporter; import net.sf.jasperreports.engine.JRDataSource; import net.sf.jasperreports.engine.JRException; import net.sf.jasperreports.engine.JRExporterParameter; 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.data.JRBeanCollectionDataSource; import net.sf.jasperreports.engine.export.JExcelApiExporter; import net.sf.jasperreports.engine.export.JRHtmlExporter; import net.sf.jasperreports.engine.export.JRHtmlExporterParameter; import net.sf.jasperreports.engine.export.JRPdfExporter; import net.sf.jasperreports.engine.export.JRRtfExporter; import net.sf.jasperreports.engine.export.JRXmlExporter; import net.sf.jasperreports.engine.util.JRLoader; import net.sf.jasperreports.j2ee.servlets.ImageServlet; /** * 使用jasperReport做报表时的工具支持类.有两个用途,生成jasperPrint对象,和设置导出时的session */ public class ReportUtils { private HttpServletRequest request; private HttpServletResponse response; private HttpSession session; /** * 在其它web环境下构造此工具类对象 * * @param request * request请求对象 */ public ReportUtils(HttpServletRequest request) { this.request = request; this.session = request.getSession(); } public ReportUtils(HttpServletResponse response) { this.response = response; } public ReportUtils(HttpServletRequest request, HttpServletResponse response) { this(request); this.response = response; } /** * 获得JasperPrint对象;自定义填充报表时的parameter和dataSource. 参数说明和动态表头的用法参考上一方法 * * @param filePath * @param parameter * @param dataSource * @param sizeGroup * @return */ public JasperPrint getJasperPrint(String filePath, Map parameter, JRDataSource dataSource) throws JRException { JasperReport jasperReport = null; try { jasperReport = (JasperReport) JRLoader.loadObject(filePath); return JasperFillManager.fillReport(jasperReport, parameter, dataSource); } catch (JRException e) { e.printStackTrace(); } return null; } /** * 通过传入List类型数据源获取JasperPrint实例 * * @param filePath * jasper路径 * @param parameter * @param list * @return * @throws JRException */ public JasperPrint getPrintWithBeanList(String filePath, Map parameter, List list) throws JRException { JRDataSource dataSource = new JRBeanCollectionDataSource(list); return getJasperPrint(filePath, parameter, dataSource); } /** * 传入类型,获取输出器 * * @param docType * @return */ public JRAbstractExporter getJRExporter(DocType docType) { JRAbstractExporter exporter = null; switch (docType) { case PDF: exporter = new JRPdfExporter(); break; case HTML: exporter = new JRHtmlExporter(); break; case XLS: exporter = new JExcelApiExporter(); break; case XML: exporter = new JRXmlExporter(); break; case RTF: exporter = new JRRtfExporter(); break; } return exporter; } public void setAttrToPage(JasperPrint jasperPrint, String report_fileName, String report_type) { session.setAttribute("REPORT_JASPERPRINT", jasperPrint); session.setAttribute("REPORT_FILENAME", report_fileName); session.setAttribute("REPORT_TYPE", report_type); } /** * 定义了报表输出类型,固定了可输出类型 * * @author Administrator * */ public static enum DocType { PDF, HTML, XLS, XML, RTF } /** * 编译报表模板文件jaxml,生成jasper二进制文件 * * @param jaxmlPath * @param jasperPath * @throws JRException */ public void complieJaxml(String jaxmlPath, String jasperPath) throws JRException { JasperCompileManager.compileReportToFile(jaxmlPath, jasperPath); } /** * 输出PDF 使用此方法,必须预先注入response * * @param jasperPath * @param params * @param sourceList * @param fileName * @throws JRException * @throws IOException * @throws ServletException */ public void servletExportPDF(String jasperPath, Map params, List sourceList, String fileName) throws JRException, IOException, ServletException { servletExportDocument(DocType.PDF, jasperPath, params, sourceList, fileName); } /** * 输出html静态页面,必须注入request和response * * @param jasperPath * @param params * @param sourceList * @param imageUrl * 报表文件使用的图片路径,比如 ../servlets/image?image= * @throws JRException * @throws IOException * @throws ServletException */ public void servletExportHTML(String jasperPath, Map params, List sourceList, String imageUrl) throws JRException, IOException, ServletException { response.setContentType("text/html"); response.setCharacterEncoding("UTF-8"); JRAbstractExporter exporter = getJRExporter(DocType.HTML); JasperPrint jasperPrint = getPrintWithBeanList(jasperPath, params, sourceList); session.setAttribute( ImageServlet.DEFAULT_JASPER_PRINT_SESSION_ATTRIBUTE, jasperPrint); PrintWriter out = response.getWriter(); exporter.setParameter(JRExporterParameter.JASPER_PRINT, jasperPrint); exporter.setParameter(JRExporterParameter.OUTPUT_WRITER, out); exporter.setParameter(JRHtmlExporterParameter.IMAGES_URI, imageUrl); exporter.exportReport(); } /** * 输出Excel报表文件 * * @param jasperPath * @param params * @param sourceList * @param fileName * @throws JRException * @throws IOException * @throws ServletException */ public void servletExportExcel(String jasperPath, Map params, List sourceList, String fileName) throws JRException, IOException, ServletException { servletExportDocument(DocType.XLS, jasperPath, params, sourceList, fileName); // 要想获得更好的视觉效果,可以添加以下代码 // // exporter.setParameter( // // JRXlsExporterParameter.IS_REMOVE_EMPTY_SPACE_BETWEEN_ROWS, // // Boolean.TRUE); // 删除记录最下面的空行 // // // exporter.setParameter(JRXlsExporterParameter.IS_ONE_PAGE_PER_SHEET, // // Boolean.FALSE);// 删除多余的ColumnHeader // // // exporter.setParameter(JRXlsExporterParameter.IS_WHITE_PAGE_BACKGROUND // , // // Boolean.FALSE);// 显示边框 } /** * 生成不同格式报表文档 * * @param docType * 文档类型 * @param jasperPath * @param params * @param sourceList * @param fileName * @throws JRException * @throws IOException * @throws ServletException */ public void servletExportDocument(DocType docType, String jasperPath, Map params, List sourceList, String fileName) throws JRException, IOException, ServletException { if (docType == DocType.HTML) { servletExportHTML(jasperPath, params, sourceList, fileName); return; } JRAbstractExporter exporter = getJRExporter(docType); // 获取后缀 String ext = docType.toString().toLowerCase(); if (!fileName.toLowerCase().endsWith(ext)) { fileName += "." + ext; } // 判断资源类型 String contentType = "application/"; if (ext.equals("xls")) { ext = "excel"; } else if (ext.equals("xml")) { contentType = "text/"; } contentType += ext; response.setContentType(contentType); response.setHeader("Content-Disposition", "attachment; filename=\"" + URLEncoder.encode(fileName, "UTF-8") + "\""); exporter.setParameter(JRExporterParameter.JASPER_PRINT, getPrintWithBeanList(jasperPath, params, sourceList)); OutputStream ouputStream = response.getOutputStream(); exporter.setParameter(JRExporterParameter.OUTPUT_STREAM, ouputStream); try { exporter.exportReport(); } catch (JRException e) { throw new ServletException(e); } finally { if (ouputStream != null) { try { ouputStream.close(); } catch (IOException ex) { } } } } } 当前代码在Servlet环境下使用,仅仅传入jasper路径,LIST类型数据源,以及其它参数即可完成报表的输出。 声明:ITeye文章版权属于作者,受法律保护。没有作者书面许可不得转载。
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