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📄 htmlservlet.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
字号:
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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.sql.SQLException;
import java.util.HashMap;
import java.util.Map;

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

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.export.JRHtmlExporter;
import net.sf.jasperreports.engine.export.JRHtmlExporterParameter;
import net.sf.jasperreports.engine.util.JRLoader;

import com.hhkj.basecommon.BaseBean;

public class HtmlServlet extends HttpServlet {

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

		BaseBean baseBean = new BaseBean();

		response.setContentType("text/html;charset=GBK");
		PrintWriter out = response.getWriter();
		String Title = request.getParameter("Title");
		String BEGINDATE = request.getParameter("BEGINDATE");
		String ENDDATE = request.getParameter("ENDDATE");

		try {

			String SubFileReport = request.getParameter("SubFileReport");
			String subPath = "/jasper/reports/" + SubFileReport + ".jasper";
			File subReportFile = new File(context.getRealPath(subPath));
			JasperReport subreport = (JasperReport) JRLoader
					.loadObject(subReportFile.getPath());

			// 引入xml编译后生成的.jasper文件
			String jasperFile = request.getParameter("jasperFile");
			String path = "/jasper/reports/" + jasperFile + ".jasper";
			File reportFile = new File(context.getRealPath(path));
			JasperReport jasperReport = (JasperReport) JRLoader
					.loadObject(reportFile.getPath());

			//
			Map parameters = new HashMap();

			// 设置报表中引入的参数，该参数和报表中设置的参数一致
			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());
			}

			parameters.put("SubFileReport", subreport);

			JasperPrint jasperPrint = JasperFillManager.fillReport(
					jasperReport, // 引入报表
					parameters, // 引入参数
					baseBean.getConnection()// 连接数据库
					);

			JRHtmlExporter exporter = new JRHtmlExporter();

			Map imagesMap = new HashMap();
			request.getSession().setAttribute("IMAGES_MAP", imagesMap);

			exporter
					.setParameter(JRExporterParameter.JASPER_PRINT, jasperPrint);
			exporter.setParameter(JRExporterParameter.OUTPUT_WRITER, out);
			exporter
					.setParameter(JRHtmlExporterParameter.IMAGES_MAP, imagesMap);
			exporter.setParameter(JRHtmlExporterParameter.IMAGES_URI,
					"image?image=");

			exporter.exportReport();
		}
		// catch (JRException e)
		catch (Exception e) {
			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>");
		} finally {
			baseBean.cleanCon();
		}
	}

	public void doPost(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {

		doGet(request, response);

	}

}

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