The development experience and skills of using the React framework in the Java class library

The development experience and skills of using the React framework in the Java class library React is a JavaScript library built as the core of UI components, which are widely used in Web front -end development.Using React can create strong and reusable user interfaces.Although React is mainly developed for JavaScript, it can also use the React framework in the Java class library to provide more convenient development experience for Java developers.This article will introduce the experience and skills of using the React framework in the Java library. 1. Install React Use the REACT framework in the Java library, and the React needs to be installed first.You can install React through the NPM (Node.js package manager) and introduce the required React modules in the Java project.Make sure you have installed node.js and NPM.Run the following commands in the command line to install React: bash npm install react react-dom --save 2. Create React components In the Java project, you can create React components to build a user interface.React component is a reusable UI unit that can be used to display specific data.You can use JavaScript (ES6 or higher) to write React components and then convert it to the Java class. The following is an example that demonstrates how to create a simple React component: import jdk.nashorn.api.scripting.ScriptObjectMirror; public class HelloWorld extends ReactComponent { public HelloWorld() { // Set the initial state of the component setState(new ScriptObjectMirror.Builder(null).put("message", "Hello, World!").build()); } @Override public String render() { // Rendering component content return String.format("<div>%s</div>", state().get("message")); } } In the above examples, we created a React component called HelloWorld and set up an initial state.In the render method, we use the MESSAGE property in State to render the content of the component. 3. Use React components Use React components in the Java library to introduce the JavaScript module of React and execute the JavaScript code in the Java code.You can use Java's JavaScript engine, such as Nashorn to perform rend components rendering. The following is an example that shows how to use React components in the Java class library: import jdk.nashorn.api.scripting.NashornScriptEngine; public class MyApp { public static void main(String[] args) throws Exception { // Create a JavaScript engine NashornScriptEngine engine = (NashornScriptEngine) new ScriptEngineManager().getEngineByName("nashorn"); // Load React modules engine.eval(new FileReader("path/to/react.js")); engine.eval(new FileReader("path/to/react-dom.js")); // Create React component instance ReactComponent helloWorld = new HelloWorld(); // Rendo the React component String output = (String) engine.invokeMethod(helloWorld, "render"); System.out.println(output); } } In the above example, we use the Nashorn engine to perform the rendering process of the React component.First, we loaded React and ReactDom modules.Then, an instance of the HelloWorld component is created, and the render method of the component is used to use the engine's INVOKEMETHOD method to render the component. 4. Construction and deployment When using the React framework in the Java library, you need to use tools to build and deploy your Java project.You can use building tools such as Maven or Gradle to manage project dependencies and packaging outputs. The following is an example configuration file (pom.xml) using Maven to build and pack the Java project: <!-Define project dependence-> <dependencies> <dependency> <groupId>org.openjdk.nashorn</groupId> <artifactId>nashorn-core</artifactId> <version>1.8.0_275</version> </dependency> <!-Other dependencies ...-> </dependencies> <!-Configure Maven plug-in-> <build> <plugins> <plugin> <groupId>org.apache.maven.plugins</groupId> <artifactId>maven-compiler-plugin</artifactId> <version>3.8.1</version> <configuration> <source>1.8</source> <target>1.8</target> </configuration> </plugin> <!-Other plug-in ...-> </plugins> </build> The following command will be executed in your Java project directory, and your Java project will be built and packaged: bash mvn clean package The above is the development experience and skills of using the React framework in the Java library.By using React, you can more conveniently build a user interface with strong interaction and reuse.I hope this article can help you use the React framework in the Java library for development.