Download Developing Java Enterprise Applications by Stephen Asbury PDF

By Stephen Asbury

From the time this booklet was once first released it appears now not many of us preferred it. that's most likely since it isn't really a Wrox Press-style treatise on how you can construct full-blown specialist Java company courses. as an alternative it's a sampler of all the a number of Java company applied sciences, entire with small courses that exhibit the way to use some of the API's. It starts off out answering such uncomplicated questions as what's company improvement? and Why use Java for company improvement? It then devotes a bankruptcy or each one to introducing the reader to a few of the firm API's - JDBC for database regulate, the JNDI for coping with gadgets in a listing, server-side programming with servlets, JSP, and JavaBeans, coping with distant items with RMI and Corba, the fundamentals of XML, developing and sending e mail utilizing JavaMail, and masses extra. not one of the chapters is meant to make you an industrial-strength Java company programmer. The purpose is simply to provide you a concept of what the entire person applied sciences and applications can do through brief programming examples so you are able to take on the Wrox Press J2EE books of the area. the single undesirable aspect of the publication is that it truly is in dire desire of an replace through a third version that i feel will most likely by no means come end result of the loss of luck this publication finally had within the realm of overall revenues. even though, when you are pleased with Java and need to get a flavor of what the company API's can do i feel it's nonetheless an outstanding funding, fairly on the very low used costs at which it really is at present to be had.

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Once you have a Connection object, query it for information about the structure of the underlying database by calling getMetaData(). This method returns an object implementing the DatabaseMetaData interface. ) This example creates a connection to the Inventory database and then prints a list of all the tables and their columns by requesting the database metadata from the Connection object, then requesting a list of available tables by calling the DBMetaData method getTables(). This returns a result set containing information about the tables in the database.

Think of the Statement object as an envelope into which you put your message. The Connection object is the transport that sends your message. When you pass SQL to the connection, it forwards this information to the driver. The driver forwards the SQL to the database and then returns results. The results come back to you in the form of a result set. The Connection object has three methods that return objects representing a database call. These methods are as follows: createStatement(). Returns an object that implements the Statement interface.

4. Native-protocol pure Java driver. Database vendors are starting to support network protocols that allow you to directly communicate with the database over the network. The JDBC drivers can be completely implemented in Java and do not need to rely on - 30 - a specific client library. Rather, they send commands directly over the network to the database. This is a flexible model, but each vendor has its own protocol. To access multiple databases using this technique, you may need multiple drivers, because each vendor may have its own unique driver for leveraging vendor-specific features such as transaction management.

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