Archive for ‘Java EE’

Monitor your file system using Java 7 Watcher Service

Monitor your file system using Java 7 Watcher Service

Java version 7 added feature to watch File System or Moniter Folder and give an alert if any changes made into folders like the creation of file , modification of file and deletion of files. The watch service API introduced in java 7 NIO.2 JSR 203 as thread safe service ,which is capable of...

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Learn JdbcRowSet, CachedRowSet and WebRowSet using Oracle

Learn JdbcRowSet, CachedRowSet and WebRowSet using Oracle

Just as DataSource objects provide an alternative to DriverManager, RowSet objects provide an alternative to ResultSet objects. The RowSet interface extends the ResultSet interface, giving you the same functionality for viewing and manipulating data plus extra functionality that makes it a flexible and powerful object to use in your applications. A RowSet object enables...

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How to Detect Ajax Request using Java Servlet?

How to Detect Ajax Request using Java Servlet?

Nowadays Developers across the world uses JavaScript frameworks like jQuery UI, ExtJs, Dojo to develop Rich Internet Applications (RIA). This JavaScript framework uses Asynchronous calls (Ajax Request) to get data from server in Json format. On server side we have plenty of frameworks like spring, Struts which can handle Asynchronous and synchronous request. In...

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How to upload mp3 songs using Apache commons File Upload?

How to upload mp3 songs using Apache commons File Upload?

In many java based web based applications developer need to implements file upload. Before Servlet 3.0 specification, servlet doesn’t support file upload and developer need to use third party library like apache common’s file upload. To know more about how to use servlet 3 for file upload, please visit my servlet 3 file upload...

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Declare Servlet 3.0 Initialization parameter using @WebInitParam

Declare Servlet 3.0 Initialization parameter using @WebInitParam

Servlet initialization parameters are used to process the data when servlet initializing. Before servlet 3, this data need to put on deployment descriptor and servlet will read the data in init() method using ServletConfig Object. For every servlet, the data is unique and not been shared in between of two servlets. Before Servlet 3...

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Servlet 3 File Uplaod example using Tomcat 7

Servlet 3 File Uplaod example using Tomcat 7

Many java web developer aware that for uploading files on server there was no api support in servlet specifications. We have to depend on third party library to upload files. Apache common’s file upload library is very popular for this task. Servlet 3 comes with default support of file upload. To make your servlet...

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Creating EJB 3.1 Stateless Session Bean using JBoss 6.1 Example

Creating EJB 3.1 Stateless Session Bean using JBoss 6.1 Example

Stateless session beans are stateless in nature, in other words it does not remember its previous invocations. A user will call the bean and the bean will return a result. A stateless bean is not good for maintaining the state of an interactive session such as required to maintain a list of purchases. However,...

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