新手数据库取图片出错了，帮忙看看

[yebiaoxiang54]

HTTP Status 500 -

--------------------------------------------------------------------------------

type Exception report

message

description The server encountered an internal error () that prevented it from fulfilling this request.

exception

org.apache.jasper.JasperException: An exception occurred processing JSP page /mail/downPart.jsp at line 42

39: OutputStream outt = response.getOutputStream();
40: BufferedInputStream buf = new BufferedInputStream(is);
41: byte[] data = new byte[90240];
42: int readed = buf.read(data);
43: while (readed != -1) {
44: outt.write(data, 0, readed);
45: readed = buf.read(data);


Stacktrace:
org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:524)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:423)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:320)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:266)
javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
myFilter.ChangeCharsetFilter.doFilter(ChangeCharsetFilter.java:24)


root cause

java.io.IOException: Stream closed
java.io.BufferedInputStream.getInIfOpen(Unknown Source)
java.io.BufferedInputStream.read1(Unknown Source)
java.io.BufferedInputStream.read(Unknown Source)
java.io.FilterInputStream.read(Unknown Source)
org.apache.jsp.mail.downPart_jsp._jspService(downPart_jsp.java:114)
org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:393)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:320)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:266)
javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
myFilter.ChangeCharsetFilter.doFilter(ChangeCharsetFilter.java:24)

什么原因呢

[fosjos]

java.io.IOException: Stream closed
int readed = buf.read(data);
很明显，is没有数据流