Steven Olson Douglas's Ajax on Java PDF

By Steven Olson Douglas

ISBN-10: 0596101872

ISBN-13: 9780596101879

This useful consultant indicates you the way to make your Java net purposes extra responsive and dynamic via incorporating new Ajaxian gains, together with advice lists, drag-and-drop, and extra. Java builders can choose from many various methods of incorporating Ajax, from construction JavaScript into your functions "by hand" to utilizing the hot Google internet Toolkit (GWT).
Ajax on Java begins with an advent to Ajax, displaying you the way to put in writing a few easy purposes that use client-side JavaScript to request details from a Java servlet and exhibit it with out doing a whole web page reload. It additionally provides numerous ideas for speaking among the buyer and the server, together with sending uncooked facts, and utilizing XML or JSON (JavaScript item Notation) for sending extra advanced collections of data.
The booklet then branches out into diversified methods for incorporating Ajax, which come with: The Prototype and Javascript libraries, the Dojo and Rico libraries, and DWR Integrating Ajax into Java ServerPages (JSP) purposes utilizing Ajax with Struts Integrating Ajax into Java ServerFaces (JSF) functions utilizing Google's GWT, which bargains a natural Java method of constructing net purposes: your client-side parts are written in Java, and compiled into HTML and JavaScript
Ajax provides net builders the facility to construct functions which are extra interactive, extra dynamic, extra fascinating and relaxing on your clients. in case you are a Java developer and have not attempted Ajax, yet want to start, this e-book is vital. Your clients should be thankful.

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Ajax on Java by Steven Olson Douglas PDF

This sensible advisor indicates you the way to make your Java internet purposes extra responsive and dynamic by way of incorporating new Ajaxian beneficial properties, together with advice lists, drag-and-drop, and extra. Java builders can make a choice from many various methods of incorporating Ajax, from construction JavaScript into your functions "by hand" to utilizing the hot Google net Toolkit (GWT).

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Extra resources for Ajax on Java

Example text

Using a Servlet to Build an XML Document Let's start by looking at the servlet code that wraps the data in XML. This servlet is shown in Example 4-1. Example 4-1. com to register . it. Thanks * wraps each of the fields with XML and sends them back through the response. "); } } } This code is similar to the code from Chapter 3. com to register it. append("\r\n"); This code simply sets up a StringBuffer called returnXML. ; wrap it with an appropriate XML tag; and append it to the buffer.

In particular, if you only have one data point, XML is overkill. But the fact is, most web applications deal with multiple data points: usernames, passwords, addresses, cities, states, zip codes, etc. How will you decipher those fields when they're sent back from the server? In some cases, passing a string of delimited values may seem like the simplest approach, but using XML has advantages. For one thing, XML is self-documenting. During debugging, you can look at the XML string and see exactly what goes where; that is a luxury you won't have with a string of comma-separated values.

Com to register it. com to register it. com to register it. Thanks

Wow, that's a chunk of code. Let's break it up into two parts: first we'll look at the XML parsing, then at writing the data to the fields. 1. ActiveXObject) { msPopulate( ); } } clear( ); } } Remember how convertToXML( ) had to determine whether the browser was Internet Explorer or something else? We have the same problem again here. When callback( ) is invoked, it must check to see whether we are runningActiveXObject (Internet Explorer) or XMLHttpRequest (all other major browsers).

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Ajax on Java by Steven Olson Douglas

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