By Steven Olson Douglas
Ajax offers internet builders the facility to construct functions which are extra interactive, extra dynamic, extra intriguing and stress-free in 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 might be thankful.
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Additional resources for Ajax on Java
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. write( ). We return a question mark (without any XML wrapping) if the key we received was null. 2. Other Ways to Build the XML Document Building an XML document by appending to a StringBuffer is a common approach, but it's far from ideal, particularly if you need to generate a large document programmatically. Fortunately, there are alternatives.
Thanks Chapter 4. XML and JSON for Ajax Do you really need XML for an Ajax application? The previous chapter showed that you don't always need XML. 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.
Start by initializing a StringWriter and a StreamResult. Initialize the StreamResult with the StreamWriter, then get aSAXTransformerFactory and get a transformerHandler from that. The TRansformerHandler allows you to create an XML document by starting a document and appending elements and data to the TRansformerHandler. Example 4-4 shows how it works. Example 4-4. com to register it. toString( ); } After calling startDocument( ) to begin the document, we must create the elements and add data to them.