Handling Exceptions in JSP

In this article, we are going to reveal what happens when an exception is thrown by a JSP web page and how to handle an exception within a JSP web page.

How an exception is thrown when executing a JSP file

In the upcoming example, we are going to display how an unhandled exception is thrown when executing a JSP file.

JspException.jsp

<html>
<head>	
<title>Using JSP exception object</title>
</head>

<body>

<%
int a=10, b=0, c;
	
c=a/b; 	//ArithmeticException i.e. Divide by zero exception is thrown here
out.println(c);		
%>

</body>
</html>

Executing the JspException.jsp gives us the following window displaying the JasperException which is thrown due to the original exception - ArithmeticException being thrown when executing this jsp file.

JspConfig.jsp

How to handle an exception in a JSP file

In this example, we are going to display how to handle an exception when executing a JSP file, using the try-catch block.

JspException1.jsp

<html>
<head>	
<title>Using JSP exception object</title>
</head>

<body>

<%
int a=10, b=0, c;
try
{
	c=a/b; 				//ArithmeticException i.e. Divide by zero exception is thrown here
	out.println(c);
}
catch(ArithmeticException ariExp)	//matching ArithmeticExcecption is declared in "catch block"
{
	out.println("We have an Exception - "+ariExp); 	//message related to caught exception is printed
}		
%>

</body>
</html>

Executing the JspException1.jsp gives us the following window displaying that we have handled the exception of type ArithmeticException which was thrown when executing this jsp file.

JspConfig.jsp

Handling Exceptions in JSP

How an exception is thrown when executing a JSP file

How to handle an exception in a JSP file

Please share this article -

Please Subscribe

Notifications