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Java Nio FTP Example

In this example we will demonstrate an FTP example program written in Java using some of the NIO features available to us. The example program will take the form of a command line program which accepts 2 arguments, namely the FTP location to transfer the file from and the local destination on the file system, inclusive of the file name, ...

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Java Servlet Cookie Methods Example

Servlets are modules of the Java code that run in a server application to answer the client requests. In this tutorial, we will show you how to store the user information in the cookie object and access it in the Servlet. 1. Introduction Servlet is a Java program which exists and executes in the J2EE servers and is used to ...

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Java Servlet Hidden Field Example

A hidden form field is a technique used to store the session information for a particular client and is one of an important Session Tracking Technique. In this tutorial, we will explain and show you how to handle the hidden fields in a Servlet. 1. Introduction Session Tracking is a technique to maintain the requests of the same user for a ...

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Java Servlet onclick Example

Servlets are modules of the Java code that run in a server application to answer the client requests. They are not tied to a specific client-server protocol but are most commonly used with HTTP. The word “Servlet” is often used in the meaning of “HTTP Servlet“. In this tutorial, we will explain and show you how to call a Servlet ...

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Java Servlet AsyncListener Example

Async Servlet was introduced in Servlet 3.0. In this section, you will learn about registering AsyncListener with the recently created AsyncContext with an example. The AsyncListener will be notified when an asynchronous event occurs. 1. Introduction AsyncEvent contains the details of the event occurred by the Asynchronous processes. These events include the successful completion of the asynchronous cycle, times out, ...

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Java Servlet SendRedirect Example

Communication between the Servlets is an important task to the programmer. sendRedirect() can be used to communicate between two servlets present in the different servers. The output will be the same as the Request Dispatcher Forward example but the URL of the page will be changed to the redirected page. In this tutorial, we will see how the sendRedirect() method ...

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Java Servlet Annotations Example

Communication between the Servlets is an important task to the programmer. In this tutorial, we will see how the Servlet annotations can replace the equivalent XML configuration in the web deployment descriptor file (web.xml). 1. Introduction The Servlet API 3.0 introduces a new package called javax.servlet.annotation which provides the annotation types which can be used for annotating a Servlet class. ...

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Java Servlet Life Cycle Example

Servlets are modules of the Java code that run on a server application to answer the client requests. They are not tied to a specific client-server protocol but are most commonly used with HTTP and the word “Servlet” is often used in the meaning of “HTTP Servlet“. In this tutorial, we will explain the Servlet Lifecycle. 1. Introduction Servlet is ...

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Java Servlet Filter Example

Servlets are modules of the Java code that run in a server application to answer the client requests. In this tutorial, we will explain how to implement the Servlet Filter API to handle the client requests. 1. Introduction Servlet is a Java program which exists and executes in the J2EE servers and is used to receive the HTTP protocol request, ...

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JSF 2 and Log4j Integration Example

Log4j is a popular and widely-used logging framework for the Java development. It’s pretty easy to setup and use the Log4j mechanism in a JSF application. In this tutorial, I will show you how to implement the logging functionality with the JSF framework.                 1. Introduction 1.1 JSF Framework JSF is an Mvc ...

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