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Tag Archives: Java 8

Hibernate SQL Parameter Values using Log4j Example

When using Hibernate, if developers log the Hibernate SQL statements, they will see something like this: Hibernate: insert into student (id, first_name, last_name, email) values (?, ?, ?, ?) However, for debugging the application, developers want to see the actual parameter values in the Hibernate logs i.e. basically, they want to get rid of the question marks in the logs. ...

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Spring MVC File Download Example

Hello readers. Spring framework provides an out of box support for the file download functionality from the server to a local machine. In this tutorial, we will show you how to implement the file download functionality with the Spring Mvc framework. To handle the file download capability in a web application, we will use the HttpServletResponse to directly write a ...

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Log4j Email Configuration Example

It is always better to get notified about any major exceptions that occur in an application instead of manually going through huge logs to find the probable exception messages. In this tutorial, I will show you how to implement an out of box Log4j appender (called as SMTPAppender) to send email alerts. 1. Introduction Printing messages to the console is ...

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Log4j Conversion Pattern Example

Logging is a critical feature of any application. In this tutorial, I will show you how to implement some useful Log4j Conversion Patterns for writing the logging mechanism in Java development. 1. Introduction Printing messages to the console is an integral part of the development testing and the debugging of a Java program. If developers are working on a Server ...

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Log4j 2 Best Practices Example

Logging is a critical feature of any application. In this tutorial, we will cover some Log4j2 best practices that can help developers get started and improve the logging with Log4j2. 1. Introduction Printing messages to the console is an integral part of the development testing and the debugging of a Java program. If developers are working on a Server side ...

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Log4j 2 Getting Started Example

In this tutorial, we will show you how to configure the Log4j2 with log4j2.xml file and print the logging to the console and a file. 1. Introduction Printing messages to the console is an integral part of the development testing and the debugging of a Java program. If developers are working on a Server side application, where they cannot see ...

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JAX-RS Web Service Example

Hello readers. In this tutorial, we will show how to use the JAX-RS (RESTful) jar files to implement a simple Hello World Web Service in Java. 1. Introduction JAX-RS stands for RESTful Web Services. JAX-RS is a set of APIs to develop the REST services. It is part of the Java EE6 and makes developers to develop the REST web ...

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Java Servlet RequestDispatcher Tutorial

Communication between the Servlets is an important task to the programmer. Request Dispatcher is an interface whose implementation defines an object which can dispatch the request to any resources on the server. In this tutorial, we will see how the javax.servlet.RequestDispatcher interface is used to forward or include the response of a resource in a Servlet.         ...

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Java Servlet Websocket Example

In this article we illustrate a simple chat program using a Websocket endpoint. The Java API for websocket provides both client and server api’s and can be found in the javax.websocket javax.websocket.server packages accordingly. The example article will do a brief dive into the mechanics of Websockets from a Java perspective and then it will demonstrate some of it’s mechanics via a ...

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Java Servlet Generate Zip File Example

In this article we illustrate how to generate a zip (compressed) file via a GET request to a custom servlet. The servlet will serve said file (configurable via a WebInitParam) to the browser and the browser will then prompt the user with a download prompt to save said file to the file system. The file will be served asynchronously using FileChannels transferTo(...). ...

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