ireport+jsp基于jasperReport 实现导出报表至web页面

package com; import java.io.IOException; import java.io.InputStream; import java.io.PrintWriter; import java.io.StringWriter; import java.util.ArrayList; import java.util.Collection; import java.util.HashMap; import java.util.List; 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.JRDataSource; import net.sf.jasperreports.engine.JasperRunManager; import net.sf.jasperreports.engine.data.JRMapCollectionDataSource; /** * * 使用Map作为数据源 * * @author zdd * * */ public class MapCollectionDSReportServlet extends HttpServlet { private JRDataSource createReportDataSource() { JRMapCollectionDataSource dataSource; Collection resportRows = initializeMapArray(); dataSource = new JRMapCollectionDataSource(resportRows); return dataSource; } private Collection initializeMapArray() { List a ; ArrayList reportRows = new ArrayList(); HashMap row1Map = new HashMap(); HashMap row2Map = new HashMap(); HashMap row3Map = new HashMap(); HashMap row4Map = new HashMap(); row1Map.put("ID", "1"); row1Map.put("NAME", "zhaodd"); row1Map.put("SEX", "female"); row2Map.put("ID", "2"); row2Map.put("NAME", "zhaodd2"); row2Map.put("SEX", "female"); row3Map.put("ID", "3"); row3Map.put("NAME", "zhaodd3"); row3Map.put("SEX", "female"); row4Map.put("ID", "4"); row4Map.put("NAME", "zhaodd4"); row4Map.put("SEX", "female"); reportRows.add(row1Map); reportRows.add(row2Map); reportRows.add(row3Map); reportRows.add(row4Map); return reportRows; } @Override protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException { ServletOutputStream servletOutputStream = resp.getOutputStream(); InputStream reportStream = getServletConfig().getServletContext() .getResourceAsStream( "/WEB-INF/classes/reports/AircraftReport.jasper"); try { JRDataSource dataSource = createReportDataSource(); JasperRunManager.runReportToPdfStream(reportStream, servletOutputStream, new HashMap(), dataSource); resp.setContentType("application/pdf"); servletOutputStream.flush(); servletOutputStream.close(); } catch (Exception e) { StringWriter stringWriter = new StringWriter(); PrintWriter printWriter = new PrintWriter(stringWriter); e.printStackTrace(printWriter); resp.setContentType("text/plain"); resp.getOutputStream().print(stringWriter.toString()); } } }