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📄 pdfservlet.java

📁 报表工具IReport的例子,实例中包括了生成pdf,html,excel等格式的报表文件．源码中包括了报表和在web上展现的源程序
💻 JAVA
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/*
 * Created on 2004-12-20
 *
 * TODO To change the template for this generated file go to
 * Window - Preferences - Java - Code Style - Code Templates
 */
package com.hhkj.jasper;

/**
 * @author wzj
 * 
 * TODO To change the template for this generated type comment go to Window -
 * Preferences - Java - Code Style - Code Templates
 */

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

import javax.servlet.ServletContext;
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.JRException;
import net.sf.jasperreports.engine.JasperReport;
import net.sf.jasperreports.engine.JasperRunManager;
import net.sf.jasperreports.engine.util.JRLoader;

import com.hhkj.basecommon.BaseBean;

/**
 * 
 */
public class PdfServlet extends HttpServlet {

	/**
	 * 
	 */
	public void service(HttpServletRequest request, HttpServletResponse response)
			throws IOException, ServletException {
		ServletContext context = this.getServletConfig().getServletContext();

		BaseBean baseBean = new BaseBean();

		String Title = request.getParameter("Title");
		String BEGINDATE = request.getParameter("BEGINDATE");
		String ENDDATE = request.getParameter("ENDDATE");

		String SubFileReport = request.getParameter("SubFileReport");
		String subPath = "/jasper/reports/" + SubFileReport + ".jasper";
		File subReportFile = new File(context.getRealPath(subPath));
		JasperReport subreport = null;
		try {
			subreport = (JasperReport) JRLoader.loadObject(subReportFile
					.getPath());
		} catch (JRException e1) {
			// TODO Auto-generated catch block
			e1.printStackTrace();
		}

		String jasperFile = request.getParameter("jasperFile");
		String path = "/jasper/reports/" + jasperFile + ".jasper";
		File reportFile = new File(context.getRealPath(path));
		Map parameters = new HashMap();
		parameters.put("SubFileReport", subreport);

		if (!Title.equals("")) {
			// 汉字转码
			String title1 = new String(Title.getBytes("ISO8859-1"), "GBK");
			parameters.put("Title", title1.toUpperCase());
		}
		if (!BEGINDATE.equals("")) {
			parameters.put("BEGINDATE", BEGINDATE.toUpperCase());
		}
		if (!ENDDATE.equals("ENDDATE")) {
			parameters.put("ENDDATE", ENDDATE.toUpperCase());
		}

		byte[] bytes = null;
		try {
			bytes = JasperRunManager.runReportToPdf(reportFile.getPath(),
					parameters, baseBean.getConnection());

		} catch (Exception e) {
			response.setContentType("text/html");
			PrintWriter out = response.getWriter();
			out.println("<html>");
			out.println("<head>");
			out
					.println("<title>JasperReports - Web Application Sample</title>");
			out
					.println("<link rel=\"stylesheet\" type=\"text/css\" href=\"../stylesheet.css\" title=\"Style\">");
			out.println("</head>");

			out.println("<body bgcolor=\"white\">");

			out
					.println("<span class=\"bnew\">JasperReports encountered this error :</span>");
			out.println("<pre>");

			e.printStackTrace(out);

			out.println("</pre>");

			out.println("</body>");
			out.println("</html>");

			return;
		} finally {
			baseBean.cleanCon();
		}

		if (bytes != null && bytes.length > 0) {
			response.setContentType("application/pdf");
			response.setContentLength(bytes.length);
			ServletOutputStream ouputStream = response.getOutputStream();
			ouputStream.write(bytes, 0, bytes.length);
			ouputStream.flush();
			ouputStream.close();
		} else {
			response.setContentType("text/html");
			PrintWriter out = response.getWriter();
			out.println("<html>");
			out.println("<head>");
			out
					.println("<title>JasperReports - Web Application Sample</title>");
			out
					.println("<link rel=\"stylesheet\" type=\"text/css\" href=\"../stylesheet.css\" title=\"Style\">");
			out.println("</head>");

			out.println("<body bgcolor=\"white\">");

			out.println("<span class=\"bold\">Empty response.</span>");

			out.println("</body>");
			out.println("</html>");
		}
	}

}

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