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posted 18 years ago

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Hi folks,

I have two JSPs that are identical in everything except their names (form1 and form1a) imaginative aren't they? I have found that Tomcat 5.0.28 generates very different servelts for the two JSPs. Not believing my eyes, I deleted the generated servlet from:

C:\Tomcat\work\Catalina\localhost\BeerV1\org\apache\jsp

and reran the app so that the servlet would be regenerated but.... same thing!

Here are the two servelts. Don't worry about reading them. A brief scan and you will see immediately that the structure is completely different. This is not a freak occurance, I have found that when I deploy a JSP several times adding bits of code as I go, that finally this will happen. The only way out seems to be to rename the JSP and start again with a new name. This can't be right!

The first is the new one:

package org.apache.jsp;
 
import javax.servlet.*;
import javax.servlet.http.*;
import javax.servlet.jsp.*;
import java.util.*;
import com.example.model.*;
 
public final class form1a_jsp extends org.apache.jasper.runtime.HttpJspBase
    implements org.apache.jasper.runtime.JspSourceDependent {
 
  private static java.util.Vector _jspx_dependants;
 
  public java.util.List getDependants() {
    return _jspx_dependants;
  }
 
  public void _jspService(HttpServletRequest request, HttpServletResponse response)
        throws java.io.IOException, ServletException {
 
    JspFactory _jspxFactory = null;
    PageContext pageContext = null;
    HttpSession session = null;
    ServletContext application = null;
    ServletConfig config = null;
    JspWriter out = null;
    Object page = this;
    JspWriter _jspx_out = null;
    PageContext _jspx_page_context = null;

out.write("\r\n");
      out.write("</div>\r\n");
      out.write("\r\n");
      out.write("\r\n");
      out.write("<div class=\"col1\">\r\n");
      out.write("\r\n");
      out.write("<p>Which type of beer do you want? </p>\r\n");
      out.write("\r\n");
      out.write("<p>Type: </p>\r\n");
      out.write("\r\n");
      out.write("</div>\r\n");
      out.write("\r\n");
      out.write("<div class=\"col2\">\r\n");
      out.write("\r\n");
      out.write("<p class=\"b\">\r\n");
      out.write("</br></br>\r\n");
      out.write("\r\n");
      out.write("<select name=\"type\" size=\"1\">\r\n");
      out.write("\r\n");
      out.write("<option>\tale\t\t</option>\r\n");
      out.write("<option>\tbitter\t\t</option>\r\n");
      out.write("<option>\tfruit/spiced\t</option>\r\n");
      out.write("<option>\torganic \t</option>\r\n");
      out.write("<option>\tstout\t\t</option>\r\n");
      out.write("<option>\tseasonal\t</option>\r\n");
      out.write("<option>\twheat\t\t</option>\r\n");
      out.write("</select>\r\n");
      out.write("\r\n");
      out.write("</div>\r\n");
      out.write("\r\n");
      out.write("\r\n");
      out.write("<div id=\"button\">\r\n");
      out.write("\r\n");
      out.write("<p></br>\r\n");
      out.write("<input type=\"submit\" value=\"send\" />\r\n");
      out.write("</div>\r\n");
      out.write("\r\n");
      out.write("</form>\r\n");
      out.write("</body>\r\n");
      out.write("</html>\r\n");
      out.write("\r\n");
    } catch (Throwable t) {
      if (!(t instanceof SkipPageException)){
        out = _jspx_out;
        if (out != null && out.getBufferSize() != 0)
          out.clearBuffer();
        if (_jspx_page_context != null) _jspx_page_context.handlePageException(t);
      }
    } finally {
      if (_jspxFactory != null) _jspxFactory.releasePageContext(_jspx_page_context);
    }
  }
}

And here is the second:

package org.apache.jsp;
 
import javax.servlet.*;
import javax.servlet.http.*;
import javax.servlet.jsp.*;
 
public final class form1_jsp extends org.apache.jasper.runtime.HttpJspBase
    implements org.apache.jasper.runtime.JspSourceDependent {
 
  private static java.util.Vector _jspx_dependants;
 
  public java.util.List getDependants() {
    return _jspx_dependants;
  }
 
  public void _jspService(HttpServletRequest request, HttpServletResponse response)
        throws java.io.IOException, ServletException {
 
    JspFactory _jspxFactory = null;
    PageContext pageContext = null;
    HttpSession session = null;
    ServletContext application = null;
    ServletConfig config = null;
    JspWriter out = null;
    Object page = this;
    JspWriter _jspx_out = null;
    PageContext _jspx_page_context = null;

try {
      _jspxFactory = JspFactory.getDefaultFactory();
      response.setContentType("text/html");
      pageContext = _jspxFactory.getPageContext(this, request, response,
      null, true, 8192, true);
      _jspx_page_context = pageContext;
      application = pageContext.getServletContext();
      config = pageContext.getServletConfig();
      session = pageContext.getSession();
      out = pageContext.getOut();
      _jspx_out = out;
 
      out.write("��< % @   p a g e   i m p o r t = \" j a v a . u t i l . * ,   c o m . e x a m p l e . m o d e l . * \"   % > \r \n");
      out.write(" \r \n");
      out.write(" < ! D O C T Y P E   h t m l   P U B L I C   \" - / / W 3 C / / D T D   X H T M L   1 . 0   S t r i c t / / E N \"   \" h t t p : / / w w w . w 3 . o r g / T R / x h t m l 1 / D T D / x h t m l 1 - s t r i c t . d t d \" > \r \n");
      out.write(" \r \n");
      out.write(" < h t m l   x m l n s = \" h t t p : / / w w w . w 3 . o r g / 1 9 9 9 / x h t m l \" >   \r \n");
      out.write(" \r \n");
      out.write(" < h e a d > \r \n");
      out.write(" \r \n");
      out.write(" < m e t a   h t t p - e q u i v = \" c o n t e n t - t y p e \" \r \n");
      out.write(" c o n t e n t = \" t e x t / h t m l ;   c h a r s e t = u t f - 8 \"   / > \r \n");
      out.write(" \r \n");
      out.write(" < t i t l e > S C W C D   F o r m   1 .   B e e r   S e l e c t o r < / t i t l e > \r \n");
      out.write(" < l i n k   r e l = \" s t y l e s h e e t \"   t y p e = \" t e x t / c s s \"   h r e f = \" c s s 6 . c s s \"   / > \r \n");
      out.write(" \r \n");
      out.write(" < / h e a d > < b o d y > \r \n");
      out.write(" \r \n");
      out.write(" < f o r m   m e t h o d = \" P O S T \"   a c t i o n = \" S e r v l e t Q 2 . d o \" > \r \n");
      out.write(" \r \n");
      out.write(" < h 3 > S e l e c t   B e e r   Q u e s t i o n   1 < / h 3 > \r \n");
      out.write(" < / b r > < / b r > \r \n");
      out.write(" \r \n");
      out.write(" < d i v   c l a s s = \" t o p \" > \r \n");
      out.write(" \r \n");
      out.write(" < % \r \n");
      out.write("         L i s t   s t y l e s   =   ( L i s t ) s e s s i o n . g e t A t t r i b u t e ( \" s t y l e s \" ) ; \r \n");
      out.write("         l o g ( \" g o t   l i s t \" ) ; \r \n");
      out.write("         S y s t e m . o u t . p r i n t l n ( \" l i s t \" ) ; \r \n");
      out.write("         I t e r a t o r   i t   =   s t y l e s . i t e r a t o r ( ) ; \r \n");
      out.write("         l o g ( \" g o t   i t e r a t o r \" ) ; \r \n");
      out.write("         S y s t e m . o u t . p r i n t l n ( \" i t e r a t o r \" ) ; \r \n");
      out.write(" \r \n");
      out.write("         w h i l e ( i t . h a s N e x t ( ) )   { \r \n");
      out.write(" \r \n");
      out.write("                 B e e r D T O   d t o   =   ( B e e r D T O )   i t . n e x t ( ) ; \r \n");
      out.write("                 l o g ( \" g o t   d t o   \"   +   d t o ) ; \r \n");
      out.write("                 S y s t e m . o u t . p r i n t l n ( \" d t o \"   +   d t o ) ; \r \n");
      out.write(" \r \n");
      out.write("                 o u t . p r i n t ( \" < / b r > t r y :   \"   +   d t o . g e t B e e r ( )   +   \r \n");
      out.write("                                     \"   :   \"   +   d t o . g e t C o l o u r ( )   + \r \n");
      out.write("                                     \"   :   \"   +   d t o . g e t T y p e ( )   ) ; \r \n");
      out.write(" \r \n");
      out.write("         } \r \n");
      out.write(" \r \n");
      out.write(" % > \r \n");
      out.write(" < / d i v > \r \n");
      out.write(" \r \n");
      out.write(" \r \n");
      out.write(" < d i v   c l a s s = \" c o l 1 \" > \r \n");
      out.write(" \r \n");
      out.write(" < p > W h i c h   t y p e   o f   b e e r   d o   y o u   w a n t ?   < / p > \r \n");
      out.write(" \r \n");
      out.write(" < p > T y p e :   < / p > \r \n");
      out.write(" \r \n");
      out.write(" < / d i v > \r \n");
      out.write(" \r \n");
      out.write(" < d i v   c l a s s = \" c o l 2 \" > \r \n");
      out.write(" \r \n");
      out.write(" < p   c l a s s = \" b \" > \r \n");
      out.write(" < / b r > < / b r > \r \n");
      out.write(" \r \n");
      out.write(" < s e l e c t   n a m e = \" t y p e \"   s i z e = \" 1 \" > \r \n");
      out.write(" \r \n");
      out.write(" < o p t i o n > \t a l e \t \t < / o p t i o n > \r \n");
      out.write(" < o p t i o n > \t b i t t e r \t \t < / o p t i o n > \r \n");
      out.write(" < o p t i o n > \t f r u i t / s p i c e d \t < / o p t i o n > \r \n");
      out.write(" < o p t i o n > \t o r g a n i c   \t < / o p t i o n > \r \n");
      out.write(" < o p t i o n > \t s t o u t \t \t < / o p t i o n > \r \n");
      out.write(" < o p t i o n > \t s e a s o n a l \t < / o p t i o n > \r \n");
      out.write(" < o p t i o n > \t w h e a t \t \t < / o p t i o n > \r \n");
      out.write(" < / s e l e c t > \r \n");
      out.write(" \r \n");
      out.write(" < / d i v > \r \n");
      out.write(" \r \n");
      out.write(" \r \n");
      out.write(" < d i v   i d = \" b u t t o n \" > \r \n");
      out.write(" \r \n");
      out.write(" < p > < / b r > \r \n");
      out.write(" < i n p u t   t y p e = \" s u b m i t \"   v a l u e = \" s e n d \"   / > \r \n");
      out.write(" < / d i v > \r \n");
      out.write(" \r \n");
      out.write(" < / f o r m > \r \n");
      out.write(" < / b o d y > \r \n");
      out.write(" < / h t m l > \r \n");
      out.write(" \r \n");
      out.write(" ");
    } catch (Throwable t) {
      if (!(t instanceof SkipPageException)){
        out = _jspx_out;
        if (out != null && out.getBufferSize() != 0)
          out.clearBuffer();
        if (_jspx_page_context != null) _jspx_page_context.handlePageException(t);
      }
    } finally {
      if (_jspxFactory != null) _jspxFactory.releasePageContext(_jspx_page_context);
    }
  }
}

Bear Bibeault

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posted 18 years ago

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Moved to the Tomcat forum.

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Sol Mayer-Orn

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posted 18 years ago

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Excuse me if you've already considered this...
But I've got a strong feeling that the pages are saved in different encoding.

Note this is *not* just what's written in the page header, e.g. :
- <%@ page contentType="text/html;charset=UTF-8" ...

Rather, it's how the page is really saved on the file system.
Checking for file encoding on Windows: open the file with Notepad, press "Save As", and look at the 'save' dialog that pops up:
it should contain an 'encoding' field, which can be 'ANSI', "UTF-8", etc...
(You don't need to actually go through with 'saving', just see the current encoding, then cancel).

I think if you test both your JSP files, Notepad would tell they have different encodings.
I get this feeling because with the 2nd JSP, the first 'out.write', looks like this:
- out.write("��< % @ p a g ...
And the little '��' scramble at the beginning of the file is usually a 'file encoding' indicator.

Please reply if that works

Good luck.

Simon Ingram

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Posts: 173

posted 18 years ago

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Sol Mam Orn,

It is exactly as you said! And it never occurred to me, so thanks! One file is ANSI the other Unicode. The ANSI generates the correct servlet, so would you say I should just use ANSI in future or is it a matter of matching the charset to the file encoding? So if I want to save the jsp file as a unicode, I have to include that in pageEncoding of the page directive?

Sol Mayer-Orn

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posted 18 years ago

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Here's my 2p on it (earned, I might note, through several *painful* weeks of converting a silly webapp to support Eastern languages...).

1)
Yep, usually (if you don't tweak Tomcat's Connector configuration), it's a matter of matching the 'physical' file format (as seen on 'save as'), with the < @%pag.. > encoding declaration...
You're probably aware that when the server transmits a page to the a browser, it first sends a 'content-type' header, telling the browser which type/encoding of data to expect (watchable on IE6, through view->encoding).
Now, your Tomcat usually formats that header based on the contentType/encoding declared of < %@ page ... > . If that header doensn't match the physical data, then the browser might interpret it incorrectly, usually ending up showing junk.

2) ANSI can be fine for simple english pages, but it doesn't support all foreign languages (and some special characters) - for those, use UTF-8 or unicode (but I *think* UTF taks up less space, on average).

Good luck

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