FAQ J2EE

<jsp-config> <jsp-property-group> <url-pattern>*.jsp</url-pattern> <include-prelude>/includes/header.jsp</include-prelude> <include-coda>/includes/footer.jsp</include-coda> </jsp-property-group> </jsp-config>

Enumeration en = request.getParameterNames(); while (en.hasMoreElements()) { String pName = (String) en.nextElement(); log.debug(pName + "=" + request.getParameter(pName)); // System.out.println(pName + "=" + request.getParameter(pName)); }

java.util.Enumeration en= request.getAttributeNames(); while (en.hasMoreElements()) { String name = (String) en.nextElement(); if(request.getAttribute(name) == null) { log.debug(name + "=NULL"); } else { log.debug(name + "=" + request.getAttribute(name).toString()); } }

<%@ page language="java" isErrorPage="true" %> 
<!DOCTYPE HTML PUBLIC "-//w3c//dtd html 4.0 transitional//en"> 
<html> 
<head> 
<title>Page d'erreur</title> 
</head> 
<body bgcolor="#FFFFFF"> 
<div>Une erreur s'est produite !</div> 


<h1>Attribut de requete</h1> 
<div class="requestAttributs"> 
<% 
java.util.Enumeration en=  request.getAttributeNames(); 
while (en.hasMoreElements()) { 
   String name = (String) en.nextElement(); 
   if(request.getAttribute(name) == null) { 
      %> 
      <div><%=name%>=null</div> 
      <% 
   } else { 
      %> 
      <div><%=name%>=<%=request.getAttribute(name).toString()%></div> 
      <% 
   } 
} 
%> 
</div> 

<div class="requestParameters"> 
<% 
en=  request.getParameterNames(); 
while (en.hasMoreElements()) { 
   String name = (String) en.nextElement(); 
   if(request.getParameter(name) == null) { 
      %> 
      <div><%=name%>=null</div> 
      <% 
   } else { 
      %> 
      <div><%=name%>=<%=request.getParameter(name).toString()%></div> 
      <% 
   } 
} 
%> 
</div> 



<h1>Exception</h1> 
<div> 
<% 
Throwable th = pageContext.getException(); 
if(th != null) { 
   printRecursiveException(out,th); 
} 
%> 
</div> 

<%! 
public void printRecursiveException(JspWriter out, Throwable th) throws java.io.IOException { 
   out.println("<div>" + th.getClass().getName() + ":" + th.getMessage() + "</div>"); 
   StackTraceElement ste; 
   for(int x=0;x < th.getStackTrace().length;x++) { 
      out.println("<div>" + th.getStackTrace()[x].toString() + "</div>"); 
   } 
    
   Throwable parent = th.getCause(); 
   if(parent != null) {       
      out.println("<div class=\"parentCause\">"); 
      printRecursiveException(out,parent); 
      out.println("</div>"); 
   }    
} 
%> 
</body> 
</html>