Breaking News: Grepper is joining You.com. Read the official announcement!

How to handle exceptions for web applications?

Pragya Keshap answered on March 1, 2023 Popularity 3/10 Helpfulness 1/10

answer How to handle exceptions for web applications?

How to handle exceptions for web applications?

Comment

There are two main mechanisms of exception handling in Java Web Application:

Programmatically exception handling mechanism: When using try and catch block in the Java code (Servlet or Filter class) to handle exceptions.

Declarative exception handling mechanism: When using the XML tags in the web.

@WebServlet(name = "errorHandlerServlet",
        urlPatterns = {"/errorHandler"},
        loadOnStartup = 1)
public class ErrorHandlerServlet extends HttpServlet {
 
    @Override
    protected void doGet(HttpServletRequest req,
            HttpServletResponse resp)
            throws ServletException, IOException {
 
        PrintWriter writer = resp.getWriter();
        Exception exception = (Exception) req.getAttribute(
                "javax.servlet.error.exception");
        writer.printf("exception: %s%n", exception);
        Class exceptionClass = (Class) req.getAttribute(
                "javax.servlet.error.exception_type");
        writer.printf("exception_type: %s%n", exceptionClass);
        Integer code = (Integer) req.getAttribute(
                "javax.servlet.error.status_code");
        writer.printf("status_code: %s%n", code);
        String errorMessage = (String) req.getAttribute(
                "javax.servlet.error.message");
        writer.printf("message: %s%n", errorMessage);
        String requestUri = (String) req.getAttribute(
                "javax.servlet.error.request_uri");
        resp.getWriter().printf("request_uri: %s%n",
                requestUri);
        String servletName = (String) req.getAttribute(
                "javax.servlet.error.servlet_name");
        writer.printf("servlet_name: %s%n", servletName);
    }
}

https://www.javatmp.com/blogs/tutorial/handle-exception-in-java-web-application

Popularity 3/10 Helpfulness 1/10 Language java

Source: Grepper

Tags: handle java

Link to this answer
Share Copy Link

Contributed on Mar 01 2023

Pragya Keshap

0 Answers Avg Quality 2/10

How to handle exceptions for web applications?

Contents

More Related Answers

How to handle exceptions for web applications?

Grepper

Documentation

Social

Legal

Contact

Oops, You will need to install Grepper and log-in to perform this action.