Interpretation of the technical principle of jQuery framework in the Java class library
Interpretation of the technical principle of jQuery framework in the Java class library
introduction:
Jquery is a very popular JavaScript library that is widely used in front -end development. It provides rich functions and easy -to -use APIs, making JavaScript development more concise and efficient.Although JQuery was written in JavaScript, there are also some Java class libraries provided JQuery's way to use java developers.This article will interpret the technical principles of the JQURY framework in the Java library, including the principles, basic usage and some example code behind it.
1. Overview of jquery:
Jquery is a fast, streamlined and powerful JavaScript library. It uses a simple grammar style to easily complete the front -end development tasks such as various DOM operations, event processing, and animation effects.In the Java class library, in order to allow Java developers to use jQuery more conveniently, some developers encapsulate the core function of jQuery and provide the Java API interface, so that Java developers can use jQuery to use jQuery to use jquery waysWrite code.
Second, JQuery's technical principles in Java class libraries:
There are two main ways to implement jQuery in the Java class library: using the Javafx WebView component or using various JavaScript parsing engines.
1. Javafx webview component:
The Javafx WebView component is a UI component in Javafx, which provides the function of loading and displaying web pages.In the Java class library, a HTML page containing the jQuery is loaded through the built -in Javafx WebView component, and the JavaScript executing interface provided by the JavaScript provided by the WebView component interacts with JavaScript code.Java developers can use the Java code to directly call WebView to load and display the page, and then use the API to call the jQuery method.
Example code:
import javafx.application.Application;
import javafx.scene.Scene;
import javafx.scene.web.WebEngine;
import javafx.scene.web.WebView;
import javafx.stage.Stage;
public class JavaFXWebViewExample extends Application {
public void start(Stage primaryStage) {
WebView webView = new WebView();
WebEngine webEngine = webView.getEngine();
webEngine.load("your_html_file_with_jquery.html");
Scene scene = new Scene(webView);
primaryStage.setScene(scene);
primaryStage.show();
}
public static void main(String[] args) {
launch(args);
}
}
2. JavaScript Analysis Engine:
Using the JavaScript parsing engine is another way to achieve jquery in the Java class library.There are some powerful JavaScript analysis engines in the Java library, such as Rhino, Nashorn, and Graalvm.These analysis engines can analyze the JavaScript code as the executable code that can be executed by Java, and provides the ability to execute the JavaScript execution through the Java API interface.Developers can execute the jQuery method by loading the JavaScript code file that contains jQuery containing jQuery.
Example code:
import org.graalvm.polyglot.Context;
import org.graalvm.polyglot.Source;
public class JavaScriptEngineExample {
public static void main(String[] args) {
Context context = Context.create();
context.eval(Source.newBuilder("js", new File("path_to_your_jquery.js")).build());
context.eval("js", "$('body').css('background-color', 'red');");
}
}
Third, the basic usage of jQuery in the Java class library:
In order to use jQuery in the Java class library, Java developers need to import the corresponding library and initialize the jQuery environment.Developers can then use the syntax similar to jquery and API to call the various methods provided by jquery.For example, select specific DOM elements by selector, use chain call operation DOM, set style, binding events, and dynamic loading data.
Example code:
import org.jquery.JQuery;
import org.jquery.JQueryFactory;
public class JQueryExample {
public static void main(String[] args) {
JQueryFactory jqueryFactory = new JQueryFactory();
JQuery jquery = jqueryFactory.getJQuery();
jquery.get("#example").css("color", "red");
jquery.get("button").click(() -> System.out.println("Clicked!"));
jquery.get("#data-container").load("example.php");
}
}
in conclusion:
This article interprets the technical principles of the Jquery framework in the Java library, introduces the two methods of using Javafx Webview components and JavaScript analysis engines to implement jQuery, and provides corresponding example code.By using the JQuery framework in the Java class library, Java developers can easily use the powerful functions of Jquery for front -end development to improve the maintenance of development efficiency and code.
