ireport打开PDF时出问题，一是出现getOutputStream()重复，二是内存不能读的问题

<%@ page import="net.sf.jasperreports.engine.*" %>

<%@ page import="java.util.*" %>

<%@ page import="java.io.*" %>

<%@ page import="java.sql.*" %>

<%

File reportFile = new File(application.getRealPath("/report33.jasper"));

String url ="jdbc:sqlserver://localhost:1433;databaseName=school";

Class.forName("com.microsoft.sqlserver.jdbc.SQLServerDriver").newInstance();

Map parameters = new HashMap();

Connection conn = DriverManager.getConnection(url,"sa", "19851023");

System.out.println(reportFile.getPath());

byte[] bytes=JasperRunManager.runReportToPdf(reportFile.getPath(),parameters,conn);

response.setContentType("application/pdf");

response.setContentLength(bytes.length);

ServletOutputStream ouputStream = response.getOutputStream();

ouputStream.write(bytes, 0, bytes.length);

ouputStream.flush();

ouputStream.close();

out.clear();

out = pageContext.pushBody();

%>

在文件尾加上的两句话

out.clear();