java - JSP info page debug helper -


does has uses jsp debug helper page can dropped webapp or included within jsp page view header, req , session attributes?

can please share if possible ? great many

  • drop pagedebugger.jsp in webapp
  • access page directly or include jsp like, layout.jsp show details on every page
  • this page lists following in table
    • request parameters
    • page scoped attributes , values
    • request scoped attributes , values
    • session scoped attributes , values
    • application scoped attributes , values
    • request headers
    • all spring beans defined in scope
    • option search resource on classpath
  • dependency on spring framework optional remove if dont use

pagedebugger.jsp

<%@taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core"%> <html> <head> <style type="text/css"> td {     word-wrap: break-word; } </style> </head> <body> <table width="100%" border="1" cellpadding="0" cellspacing="0"     style="table-layout: fixed;">     <colgroup>         <col width="500">     </colgroup>     <tr>         <th colspan="2">         <h3>attributes in $paramvalues</h3>         </th>     </tr>     <c:foreach var="entry" items="${paramvalues}">         <tr>             <td><c:out value="${entry.key}" /></td>             <td><c:foreach var="item" items="${entry.value}"                 varstatus="status">                 <pre><c:out value="${item}" /></pre>                 <c:if test="${not status.last}">                     <br />                 </c:if>             </c:foreach></td>         </tr>     </c:foreach>     <tr>         <th colspan="2">         <h3>attributes in $requestscope</h3>         </th>     </tr>     <c:foreach var="entry" items="${requestscope}">         <tr>             <td><c:out value="${entry.key}" /></td>             <td><pre><c:out value="${entry.value}" /></pre></td>         </tr>     </c:foreach>     <tr>         <th colspan="2">         <h3>attributes in $sessionscope</h3>         </th>     </tr>     <c:foreach var="entry" items="${sessionscope}">         <tr>             <td><c:out value="${entry.key}" /></td>             <td><pre><c:out value="${entry.value}" /></pre></td>         </tr>     </c:foreach>     <tr>         <th colspan="2">         <h3>attributes in $pagescope</h3>         </th>     </tr>     <c:foreach var="entry" items="${pagescope}">         <tr>             <td><c:out value="${entry.key}" /></td>             <td><pre><c:out value="${entry.value}" /></pre></td>         </tr>     </c:foreach>     <tr>         <th colspan="2">         <h3>attributes in $headervalues</h3>         </th>     </tr>     <c:foreach var="entry" items="${headervalues}">         <tr>             <td><c:out value="${entry.key}" /></td>             <td><c:foreach var="item" items="${entry.value}"                 varstatus="status">                 <pre><c:out value="${item}" /></pre>                 <c:if test="${not status.last}">                     <br />                 </c:if>             </c:foreach></td>         </tr>     </c:foreach>     <tr>         <th colspan="2">         <h3>attributes in $applicationscope</h3>         </th>     </tr>     <c:foreach var="entry" items="${applicationscope}">         <tr>             <td><c:out value="${entry.key}" /></td>             <td><pre><c:out value="${entry.value}" /></pre></td>         </tr>     </c:foreach>     <tr>         <th colspan="2">         <h3>system properties</h3>         </th>     </tr>     <tr>         <th>key</th>         <th>value</th>     </tr>     <%@page import="java.util.map"%>     <%@page import="java.util.set"%>     <%@page import="java.util.properties"%>     <%@page import="java.util.arrays"%>     <%         properties p = system.getproperties();         set<map.entry<object, object>> set = p.entryset();         (map.entry<object, object> e : set) {     %>     <tr>         <td><%=e.getkey()%></td>         <td><%="".equals(e.getvalue()) ? "&nbsp;" : e.getvalue()%></td>         <%             }         %>     </tr>     <tr>         <th colspan="2">         <h3>spring beans</h3>         </th>     </tr>     <%@page import="org.springframework.web.context.webapplicationcontext"%>     <%@page         import="org.springframework.web.context.support.webapplicationcontextutils"%>     <%@page import="org.springframework.core.io.resource"%>     <%         try {             webapplicationcontext springcontext = webapplicationcontextutils                     .getwebapplicationcontext(config.getservletcontext());             if (springcontext != null) {                 string[] beannames = springcontext.getbeandefinitionnames();                 arrays.sort(beannames);                 (string beanname : beannames) {                     string classname = springcontext.gettype(beanname)                             .getname();     %>     <tr>         <td><%=beanname%></td>         <td><%=classname%></td>     </tr>     <%         }     %>     <tr>         <th colspan="2">         <h3>spring resources</h3>         </th>     </tr>     <tr>         <th colspan="2">         <form><input name="resources" size="50"/></form>         </th>     </tr>      <%         string resourcenames = request.getparameter("resources");                 if (resourcenames != null) {                     resource[] resources = springcontext                             .getresources(resourcenames);                     (resource r : resources) {     %>     <tr>         <td><%=r.getfilename()%></td>         <td><%=r.geturi()%></td>     </tr>     <%         }                 }             }         } catch (exception e) {             e.printstacktrace();         }     %>   </table> </body> </html>

additionally if have option modify web.xml, have @ these can used monitor / profile active http session attributes

http://code.google.com/p/sessionmon/

http://messadmin.sourceforge.net/


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