无法通过JavaScript进行JavaFX WebView向上调用 [英] JavaFX WebView up call from JavaScript doesn't work
问题描述
我有一个JavaFX WebView，想从显示在Webview中的"test.html"中调用类"JavaBridge"的方法"hello". 为什么不起作用?我确保仅在完全渲染页面后才将"bridge"对象添加到window.object中，因此这可能不是问题.我也看不到HTML的任何问题.
I have a JavaFX WebView and want to call the method "hello" of the class "JavaBridge" from "test.html" displayed in the webview. Why doesn't this work? I making sure that the "bridge" object only be added to the window.object when the page has been fully rendered, so that is probably not the problem. I can't see any problem with the HTML either.
这是HTML代码("test.html"):
Here is the HTML code ("test.html"):
<html>
<head>
</head>
<body>
<a href="#click" onclick="bridge.hello()">call java</a>
</body>
</html>
这是Java代码:
import javafx.application.Application;
import javafx.beans.value.ChangeListener;
import javafx.beans.value.ObservableValue;
import javafx.concurrent.Worker;
import javafx.concurrent.Worker.State;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.layout.StackPane;
import javafx.stage.Stage;
import javafx.scene.web.WebEngine;
import javafx.scene.web.WebView;
import netscape.javascript.JSObject;
public class HelloWorld extends Application {
public static void main(String[] args) {
launch(args);
}
@Override
public void start(Stage primaryStage) {
java.net.URI uri = java.nio.file.Paths.get("test.html").toAbsolutePath().toUri();
WebView root = new javafx.scene.web.WebView();
root.getEngine().load(uri.toString());
root.getEngine().
getLoadWorker().
stateProperty().
addListener(new ChangeListener < State > () {
@Override public void changed(ObservableValue ov, State oldState, State newState) {
if (newState == Worker.State.SUCCEEDED) {
System.out.println("READY");
JSObject jsobj = (JSObject) root.getEngine().executeScript("window");
jsobj.setMember("bridge", new JavaBridge());
}
}
});
primaryStage.setScene(new javafx.scene.Scene(root, 800, 600));
primaryStage.show();
}
}
class JavaBridge {
public void hello() {
System.out.println("hello");
}
}
推荐答案
您的内部类应位于主类内部.它应该是公开的.像这样:
Your inner class should be inside the main class. And it should be public. Like this:
import java.net.URL;
import javafx.application.Application;
import javafx.beans.value.ChangeListener;
import javafx.beans.value.ObservableValue;
import javafx.concurrent.Worker;
import javafx.concurrent.Worker.State;
import javafx.scene.web.WebView;
import javafx.stage.Stage;
import netscape.javascript.JSObject;
public class HelloWorld extends Application {
public static void main(String[] args) {
launch(args);
}
@Override
public void start(Stage primaryStage) {
final URL url = getClass().getResource("test.html");
WebView root = new javafx.scene.web.WebView();
root.getEngine().load(url.toExternalForm());
root.getEngine().getLoadWorker().stateProperty().addListener(new ChangeListener<State>() {
@Override
public void changed(ObservableValue ov, State oldState, State newState) {
if (newState == Worker.State.SUCCEEDED) {
System.out.println("READY");
JSObject jsobj = (JSObject) root.getEngine().executeScript("window");
jsobj.setMember("bridge", new JavaBridge());
}
}
});
primaryStage.setScene(new javafx.scene.Scene(root, 800, 600));
primaryStage.show();
}
public class JavaBridge {
public void hello() {
System.out.println("hello");
}
}
}
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