JasperReport学习笔记3-在浏览器生成PDF文件

在浏览器生成PDF文件，主要用了JasperRunManager对象面的runReportToPdfStream方法，在WEB里一般都先用iReport生成jasper文件，这样就去解析JRXML文件了

例子如下

import java.io.IOException;
import java.io.InputStream;
import java.io.PrintWriter;
import java.io.StringWriter;
import java.util.HashMap;

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.JREmptyDataSource;
import net.sf.jasperreports.engine.JRException;
import net.sf.jasperreports.engine.JasperRunManager;

publicclass JasperReportServlet extends HttpServlet {

privatestaticfinallong serialVersionUID = 1L;

publicvoid doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
//获得输出流
 ServletOutputStream outputStream = response.getOutputStream();
//获得输入流
 InputStream inputStream = getServletConfig().getServletContext().getResourceAsStream("JasperFile//JasperReportFile.jasper");
try {

//生成网页的PDF文件
 JasperRunManager.runReportToPdfStream(inputStream, outputStream, new HashMap(), new JREmptyDataSource());
//设置PDF格式
 response.setContentType("application/pdf");
 outputStream.flush();
 outputStream.close();
 } catch (JRException e) {
 StringWriter stringWriter = new StringWriter();
 PrintWriter printWriter = new PrintWriter(stringWriter);
 e.printStackTrace(printWriter);
 response.setContentType("text/plain");
 response.getOutputStream().print(stringWriter.toString());
 }
 }


publicvoid doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
this.doPost(request, response);
 }
}