Download e-book for iPad: Ajax on Java by Steven Olson Douglas

By Steven Olson Douglas

ISBN-10: 0596101872

ISBN-13: 9780596101879

This functional 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 purposes "by hand" to utilizing the hot Google net Toolkit (GWT).
Ajax on Java starts off with an advent to Ajax, exhibiting you the way to put in writing a few simple functions that use client-side JavaScript to request info from a Java servlet and exhibit it with out doing a whole web page reload. It additionally offers a number of recommendations 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 varied ways 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) purposes 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 internet builders the facility to construct purposes which are extra interactive, extra dynamic, extra fascinating and stress-free on your clients. in case you are a Java developer and have not attempted Ajax, yet wish to start, this ebook is vital. Your clients can be thankful.

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Thanks This step can be skipped, because it only formats the document for readability by adding linefeeds and spaces. Since humans shouldn't need to read this document (unless you are debugging), you won't need the formatting. 3. SAX SAX, the Simple API for XML, provides another way to create an XML document for an Ajax application. It may be faster than JDOM or dom4J, because it doesn't require building a DOM tree for your document. Start by initializing a StringWriter and a StreamResult. Initialize the StreamResult with the StreamWriter, then get aSAXTransformerFactory and get a transformerHandler from that.

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. Another reason for using XML is that an XML parser is built into most browsers. The parsing work has already been done for you; all you have to do is leverage the built-in parser. Sure, you could pass the data in other formatsJava properties files, comma or tab-separated values, YAML files, or a cute custom format that you've designed yourselfbut then you would have to write your own parser in JavaScript.

In this case, XML is overkill. However, for real-world applications, you'll need to move more complex data, and you'll want a more structured way to represent your data. The next chapter will illustrate how easy it is to use XML with Ajax to parse the data coming from the server. It will also demonstrate how to use JavaScript Object Notation ( JSON), a native JavaScript data representation that you may find more convenient than XML. com to register it. Thanks Chapter 4. XML and JSON for Ajax Do you really need XML for an Ajax application?

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Ajax on Java by Steven Olson Douglas

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