Handling Errors in JSP - Programmingempire

The following article describes Handling Errors in JSP.

Basically, in a JSP (JavaServer Pages) application, errors can occur due to various reasons such as invalid input data, incorrect database connections, and programming errors. So, handling these errors properly is important to ensure that the application functions correctly and does not crash.

Different Ways for Handling Errors in JSP

One way to handle errors in a JSP application is to use the try-catch block to catch exceptions and handle them gracefully. The following example demonstrates how to use the try-catch block in a JSP.

<% try {
    // Code that might throw an exception
} catch(Exception e) {
    // Error handling code
} %>

In this example, any code that might throw an exception is enclosed within the try block. Therefore, if an exception is thrown, the catch block will catch it and execute the error handling code.

Another way to handle errors in a JSP application is to use the JSP error page mechanism. This mechanism allows you to specify a custom error page that will be displayed when an error occurs. The following example demonstrates how to use the error page mechanism.

At first, create a custom error page called error.jsp

<html>
<head>
  <title>Error Page</title>
</head>
<body>
  <h1>An error occurred!</h1>
  <p><%= exception.getMessage() %></p>
</body>
</html>
Add the following directive at the top of your JSP page to specify the error page:
<%@ page isErrorPage="true" %>
Add the following code to the error page to display the error message:
<%= exception.getMessage() %>

As can be seen, in this example, the isErrorPage attribute of the page directive is set to true, indicating that this JSP page is an error page. Also, the exception object is automatically available in the error page and contains information about the error that occurred. The getMessage() method is used to display the error message.

These are two common ways to handle errors in a JSP application. So, the approach you choose will depend on the specific requirements of your application.

Different Ways for Handling Errors in JSP

Further Reading