Ajax in Oracle JDeveloper by Deepak Vohra

By Deepak Vohra

Asynchronous JavaScript and XML (Ajax) is an internet method used to move info among a browser and server asynchronously with no posting the net web page to the server. "Asynchronously" signifies that the processing of the net web page keeps whereas the Ajax request is shipped to the server and a reaction is obtained from the server. the internet web page, or section(s) of the internet web page, is refreshed with the Ajax reaction with no reposting the internet web page. Ajax has the subsequent merits over non-Ajax net applications.

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

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

- Separation of information, layout and elegance.

The e-book covers internet 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 established. JDeveloper has the subsequent benefits 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 aid for JSF and for JDBC.

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Regex package. We have used the business logic that if a catalog id is not defined in the database it is valid. If a catalog entry is already defined for the catalogId value include the field values of the different fields in the input form in the XML DOM object. The XML DOM object is required to have a root element. In the example application, the XML DOM object has a element that specifies the validity of the Catalog Id field value. println(“true”); } + If the catalogId field value is not defined in the database, a catalog entry may be added for the catalogId value by obtaining a JDBC connection to the database, and adding a catalog entry with an SQL INSERT statement.

Jsp as shown in Fig. 1. 4 Configuring Prototype in AJAX Web Application 51 Fig. jsp. jsp. js” type=”text/javascript”> In the Ajax application version without the prototype library, the catalogId field is retrieved with get getElementById() function and the value is retrieved with value attribute. value; Retrieve the catalogId value with prototype function $F(). var catalogId=$F('catalogId'); 52 3 Less JavaScript with Prototype In the non-prototype version, the DOM elements are retrieved with getElementById() function.

Xml file. 3 Sending an Ajax Request In this chapter, we shall create an Ajax web application that validates data input in a HTML form. Data added to the HTML form is sent asynchronously to the server. On the server side, a HTTP servlet processes the input from the form and returns a response as an XML DOM object. In the client application the response from the server is processed and a message is output about the validity of the data added. In the example application, an input form is used to create a catalog entry that is sent to the server and updated in the database in a server side Servlet.

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