IllegalStateException in JSP

Question

Hi,
I am trying to print HTML Stream in a part of jsp file. It throws IllegalStateException. I have a jsp file with some text boxes. When pressing search button, i need to generate a HTML file using jasper report and print at the bottom of search page.
How to do this?.
I have planned to do it using two jsp pages. Once i press search button. second page will include in the main page and shows the HTML report. If i execute second page which prints report alone it works fine. If i include the page in the main page. It throws IllegalStateException. Exception throws at "OutputStream ouputStream = response.getOutputStream();" line.
How to achive/solve this.
Thanks and Regards,
Narayanan. G

Answer 1

I have planned to do it using two jsp pages. Once i press search button. second page will include in the main page and shows the HTML report. If i execute second page which prints report alone it works fine. If i include the page in the main page. It throws IllegalStateException. Exception throws at "OutputStream ouputStream = response.getOutputStream();" line.
While invoking the main page that draws html, the code would have used the response object's PrintWriter. Further calls to getOutputStream() would cause this error. In short, you can invoke only either getWriter() or getOutputStream() in one request/response cycle, not both (which is also why the two pages display correctly when invoked in stand alone fashion).
Here is the javadoc
getOutputStream
public ServletOutputStream getOutputStream()
throws java.io.IOExceptionReturns a ServletOutputStream suitable for writing binary data in the response. The servlet container does not encode the binary data. Either this method or getWriter() may be called to write the body, not both.
Throws:
**java.lang.IllegalStateException - if the getWriter method has been called on this response**
See Also:
getWriter()
ram.