Ajax on Java, 1st Edition by Steven Olson Douglas

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By Steven Olson Douglas

This useful advisor indicates you ways to make your Java net functions extra responsive and dynamic by way of incorporating new Ajaxian beneficial properties, together with recommendation lists, drag-and-drop, and extra. Java builders can make a choice from many various methods of incorporating Ajax, from development JavaScript into your functions "by hand" to utilizing the recent Google net Toolkit (GWT).
Ajax on Java begins with an creation to Ajax, exhibiting you ways to write down a few simple functions that use client-side JavaScript to request info from a Java servlet and demonstrate it with out doing a whole web page reload. It additionally provides a number of suggestions for speaking among the customer and the server, together with sending uncooked information, and utilizing XML or JSON (JavaScript item Notation) for sending extra complicated collections of data.
The e-book then branches out into various methods for incorporating Ajax, which come with: The Prototype and script.aculo.us 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 internet functions: your client-side elements are written in Java, and compiled into HTML and JavaScript
Ajax offers net builders the power to construct purposes which are extra interactive, extra dynamic, extra intriguing and relaxing on your clients. in case you are a Java developer and have not attempted Ajax, yet wish to start, this ebook is key. Your clients should be thankful.

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There is another good way to send data to and from the server: JavaScript Object Notation (JSON). We will discuss JSON toward the end of this chapter. com to register it. 1. The Character Decoder The example in this chapter is similar to the one in the previous chapter, but instead of the server returning one data point, it's going to return five. Retuning a small collection of data shows what happens when you go beyond a single data point and illustrates why most Ajax applications need XML or some other way to structure the data that is passed from the server to the client.

Thanks dom4j is an XML library similar in intent to JDOM. html and installing it in your application's WEB-INF/lib directory, you can use it to create your XML document. As shown inExample 4-3, we create a document, add a root element to the document, add the elements and data to the root, and then return the document in a String. Example 4-3. XMLWriter; ... createDocument( ) to create the XML document. addElement( ) puts a child element on the root element, andaddText( ) puts the data in the elements.

There is another good way to send data to and from the server: JavaScript Object Notation (JSON). We will discuss JSON toward the end of this chapter. com to register it. 1. The Character Decoder The example in this chapter is similar to the one in the previous chapter, but instead of the server returning one data point, it's going to return five. Retuning a small collection of data shows what happens when you go beyond a single data point and illustrates why most Ajax applications need XML or some other way to structure the data that is passed from the server to the client.

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