JSTL <c: catch>
If you have written some code which you think that it
can invoke a error, and still you are confident that you can recover from that
solution by yourself. Then then is one tag provided to you that is <c:catch>
which is one of the tag of core action library. It works like a try/catch block
in java.
If we have any doubt that the particular code can
invoke a error then we should write those codes inside the <c:catch> core
action tag. The beauty of this tag is that it works both like a try and catch.
There is no such thing like try tag. This tag can handle both the try and catch
situation.
In this example we are going to use the var
attribute of the <c:catch> core action. This attribute is optional that
means it is not mandatory. This attribute is used when we want to access the
exception after the end of the <c:catch> tag. In this example we
have also used one more tag that is <c:if>, which we are using to check
the condition.
The code of the program is given below:
<%@ taglib uri="http://java.sun.com/jstl/core" prefix="c" %>
<html>
<head>
<title>Catching the Exception</title>
</head>
<body>
<strong>I can catch the exception:</strong><br>
<c:catch var ="catchException">
The exception will be thrown inside the catch:<br>
<% int x = 5/0;%>
</c:catch>
<c:if test = "${catchException!=null}">
The exception is : ${catchException}<br><br>
There is an exception: ${catchException.message}<br>
</c:if>
</body>
</html> |
The output of the program is given below:
Download this example.
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