��阳-化缘 — Wed, 02 Jul 2008 08:58:00 GMT

1.在项目中JSP��面输出��显�C�Zؓ(f��)囄��Ӟ��h��Ӟ��报以下错�?br /> getOutputStream() has already been called for this response
index.jsp

show.jsp
<%@ page contentType="text/html; charset=gbk" %>
<%@ page import="java.io.*"%>
<%@ page import="cn.com.hnisi.visio.image.*"%>
<%
VisioDemo v=new VisioDemo();
v.setVisible(false);
try
{
byte[] image = v.getVisio().createPreview(new File("E:/test/test.vsd"));
response.setContentType("image/jpeg");
OutputStream outs = response.getOutputStream();
outs.write(image);
outs.flush();

}
catch(Exception e)
{
    System.out.println(e.getMessage());
}
%>
出现错误原因是response的数据流没有释放
解决办法
<%@ page contentType="text/html; charset=gbk" %>
<%@ page import="java.io.*"%>
<%@ page import="cn.com.hnisi.visio.image.*"%>
<%
VisioDemo v=new VisioDemo();
v.setVisible(false);
try
{
byte[] image = v.getVisio().createPreview(new File("E:/test/test.vsd"));
response.setContentType("image/jpeg");
OutputStream outs = response.getOutputStream();
outs.write(image);
outs.flush();
outs=null;
    response.flushBuffer();
    out.clear();
    out = pageContext.pushBody();
}
catch(Exception e)
{
    System.out.println(e.getMessage());
}
%>

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