programming forums Java Java JSRs Mobile Certification Databases Caching Books Engineering Micro Controllers OS Languages Paradigms IDEs Build Tools Frameworks Products This Site Careers Other all forums Hi People I've got a problem: I need to create a database(SQL) to store username and passwords. Now I need to write a Login Screen(Java application) where users can input the username and password, the Java Application needs so verify that the username and password matches the respective entry in the database, if any.

validating username and password from database using servlet-41

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I tried to create a simple login form which takes username&password,checks with the mysql database table.

But i can't execute somebody help me out with this. The tomcat error i'm getting is The requested resource (/User Demo/firstserv) is not available.

Right now I am showing a message from the validation servlet if the username and passwords are invalid.

How do I show a message on front end using javascript or anyother tool to jsp view? Http Servlet Response; public class First Servlet extends Http Servlet import Here the Username and Password entered by the user is passed to the stored procedure and its status is captured and if the value is not -1 (Username or password incorrect) or -2 (Account not activated) then the user is redirected to the Home page using Here Mudassar Ahmed Khan has explain with an example, how to check Username availability i.e. This article will illustrate how to check Username availability in database on Registration Form by making AJAX call to database using Java Script XML HTTP function and Web Method in ASP. check whether Username exists in database or not using AJAX Page Methods in ASP. Net AJAX Script Manager and AJAX Page Methods in ASP. 3)In do Post() method after retrieving the username and password, do Login() method of Login Service class is called.4)In do Login() method we get the database connection(here we are using MYSQL database) and querying the database for any matching record having the username and password entered by the user. When a request comes from browser, Web Container uses this file to indentify which servlet to call .Is it something that I am supposed to do inside my SQL database or in my Java code?