Download Ajax in Oracle JDeveloper by Deepak Vohra PDF

By Deepak Vohra

ISBN-10: 3540775951

ISBN-13: 9783540775959

ISBN-10: 354077596X

ISBN-13: 9783540775966

Asynchronous JavaScript and XML (Ajax) is an online strategy used to move information among a browser and server asynchronously with out posting the net web page to the server. "Asynchronously" means that the processing of the net web page keeps whereas the Ajax request is shipped to the server and a reaction is got from the server. the internet web page, or section(s) of the internet web page, is refreshed with the Ajax reaction with out reposting the internet web page. Ajax has the next benefits over non-Ajax internet applications.

- lowered reaction time and decreased server load, because the entire online page isn't reposted.

- decreased bandwidth of net functions as simply facts is transferred and the HTML structure is utilized within the browser.

- Separation of information, layout and magnificence.

The e-book covers net seek and RSS Feed with Ajax in addition to shape validation with Ajax frameworks for Java, JSP, JSF, and personal home page. It discusses utilizing Ajax in Oracle JDeveloper and is IDE dependent. JDeveloper has the subsequent merits over Eclipse IDE.

- JDeveloper 11g presents an built-in JavaScript Editor for Ajax/Web improvement.

- It additionally offers a Hypertext Preprocessor extension.

- JDeveloper has a integrated help for JSF and for JDBC.

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Fig. 2 Setting the Environment 23 Click on Next in Create HTTP Servlet Wizard. In Servlet Information window, specify a Servlet name, FormValidationServlet, and click on Next as shown in Fig. 6. Fig. 6 Specifying Servlet Class In the Mapping Information window specify a servlet mapping URL, /validateForm for example, and click on Next as shown in Fig. 7. 24 2 Developing an Ajax Web Application Fig. 7 Specifying Servlet Mapping URL In Servlet Parameters window, specify any servlet parameters if required (none by default) and click on Finish.

Ajax is a technique, therefore a combination other than JavaScript, DOM and Servlet may be used. For example, the server side application may be a PHP script instead of a servlet. In this chapter we used Ajax to validate an input form in JDeveloper 11g. HTTP Servlet is used on the server side. 1 Introduction In the previous chapter we discussed the procedure to create an Ajax web application. The reader might have noticed that the client script included a lot of JavaScript. Prototype is a JavaScript library for developing dynamic web applications.

A catalog entry for the specified field values gets added to the database. If subsequently, a Catalog Id value of Catalog4 is re-specified, an XMLHttpRequest gets sent to the server, and the response has element set to false. The validation message gets displayed to indicate that the Catalog Id is not valid as shown in Fig. 18. Fig. 5 Summary The Ajax technique provides dynamic validation of data added to an input form using the XMLHttpRequest object. Ajax is a technique, therefore a combination other than JavaScript, DOM and Servlet may be used.

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Ajax in Oracle JDeveloper by Deepak Vohra

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