Oracle JSF 1.2 Specification API's functions and characteristics in the Java class library
Oracle JSF 1.2 Specification API's functions and characteristics in the Java class library
Overview:
Javaseerver Faces (JSF) is a web application framework for building a user interface.It simplifies the web development process by providing rich component libraries, the standardization mechanism used to handle user input, and powerful event models.Oracle JSF 1.2 specification API is a specified API of JSF 1.2 version. It is located in the Java class library and provides a class and interface for developing JSF -based web applications.
Function and characteristics:
1. Component library: Oracle JSF 1.2 Specification API provides a wealth of component libraries to build a user interface for Web applications.These components include common interface elements such as input boxes, buttons, tables, drop -down lists, etc. Developers can use these components to quickly build a user interface.
2. Event model: JSF 1.2 Specification API provides a powerful event model that allows developers to handle various events on the user interface in an object -oriented manner.By using event monitoring and callback methods, developers can respond to the user's input, click, etc., and perform the corresponding business logic.
3. Form processing: JSF 1.2 Specification API provides a standardized form processing mechanism.Developers can easily use these mechanisms to easily handle tasks such as submission, verification, and data binding of forms.The classes and interfaces in the API provide a series of methods to operate each field in the form and store the data to the server.
4. Data binding: Data binding is an important feature of JSF 1.2.It allows developers to bind the elements in the user interface with the data model of the background to achieve two -way transmission of data.Developers can automatically automatically synchronize the value of the interface element with the data model by specifying the binding expression on the interface element.
5. Internationalization support: JSF 1.2 Specification API provides support for internationalization and localization.Developers can use the class and methods in API to achieve localization of the interface to adapt to users in different languages and regions.This includes support for localized processing such as text, date, and currency.
Example code and related configuration:
Below is a simple use of Oracle JSF 1.2 specification API development sample code:
1. XHTML page code:
html
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml"
xmlns:jsf="http://java.sun.com/jsf/core"
xmlns:h="http://java.sun.com/jsf/html">
<h:head>
<title>JSF Example</title>
</h:head>
<h:body>
<h:form>
<h:inputText value="#{user.name}" />
<h:commandButton value="Submit" action="#{user.submit}" />
<h:outputText value="#{user.message}" />
</h:form>
</h:body>
</html>
2. Java code:
import javax.faces.bean.ManagedBean;
import javax.faces.bean.RequestScoped;
@ManagedBean
@RequestScoped
public class UserBean {
private String name;
private String message;
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getMessage() {
return message;
}
public void setMessage(String message) {
this.message = message;
}
public void submit() {
message = "Hello, " + name + "!";
}
}
The above code demonstrates a simple user registration interface.The user enters the name in the input box. After clicking the submission button, the backstage will return the name of the user input to the page to the page.
Related configuration:
1. Add the following configuration to the web.xml file of the project:
<servlet>
<servlet-name>Faces Servlet</servlet-name>
<servlet-class>javax.faces.webapp.FacesServlet</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>Faces Servlet</servlet-name>
<url-pattern>*.xhtml</url-pattern>
</servlet-mapping>
2. Add the following configuration in the project's Faces-config.xml file:
<managed-bean>
<managed-bean-name>user</managed-bean-name>
<managed-bean-class>com.example.UserBean</managed-bean-class>
<managed-bean-scope>request</managed-bean-scope>
</managed-bean>
These configurations are used to forward JSF requests to the corresponding Servlet and Managed Bean.
Summarize:
Oracle JSF 1.2 Specification API provides developers with rich functions and characteristics in the Java class library, enabling them to easily build JSF -based web applications.The above is a simple example and related configuration, but there are more functions and features that can be used for more complex application development.
