The errorPage Attribute of page Directive In JSP
This section illustrates you about the errorPage
attribute of the page directive in JSP. This attribute sets a url (relative
path starting from the "/" which refers from the root directory of
your JSP application). If any exception is generated the the attribute refers to
the file which is mentioned in the given url. If you do not specify the url then
the attribute refers to the current page of your JSP application if any
exception generated.
Here, this section provides the two JSP files these
are:
- ErrorPageAttribute.jsp
- error.jsp
About the ErrorPageAttribute.jsp page:
This page show a simple text box in which you have to
enter a number and a button which is used for submission the html form and
divided the entered number by 0 (Zero) i.e. the cause of generating an error and
the page is redirected to the specified file name which is mentioned as the
value of the errorPage attribute of the page directive.
About the error.jsp page:
This page shows the error generated in the calling JSP
page because of dividing the entered number by zero or any type of the error
when the value of the isErrorPage attribute is set with the true
value.
Here is the code of the ErrorPageAttribute.jsp
page:
<%@page errorPage="error.jsp" %>
<html>
<head><title>Showing Error Page.</title></head>
<body>
<form method="post">
<table border="0" cellspacing="0" cellpadding="0">
<tr>
<td>Enter a number: </td>
<td><input type="text" name="txtNum" />
</tr>
<tr>
<td> </td>
<td><input type="submit" name="B1" value=
"Divide by zero" />
</tr>
</table>
</form>
<%
if(request.getParameter("txtNum") != null){
if(!request.getParameter("txtNum").equals("")){
int div = Integer.parseInt(request.
getParameter("txtNum")) / 0;
out.println("Answer is: " + div);
}
else{
out.println("<html><font color=red>Please
enter a number.</font></html>");
}
}
%>
</body>
</html>
|
Output for the ErrorpageAttribute.jsp page:
Here is the code of the error.jsp page:
<%@page isErrorPage="true" %>
<html>
<head><title>Error Page.</title></head>
<body bgcolor="blue">
<font size="16" color="white">Your page generated
an error:"<br/>
Exception:<br/></font>
<%= exception.toString() %>
</body>
</html>
|
Output for the error.jsp page:
Download
ErrorPageAttribute.jsp file.
Download error.jsp file.
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