Swing Java应用程序和iframe-两种通信方式 [英] swing java app and iframe - two way communication

问题描述

我有一个Java swing应用程序，想在iframe中呈现html页面.根据我在iframe中的操作，是否可以将参数或数据传递回我的java swing应用程序?

I have a java swing app and would like to render html pages in an iframe. Depending on what I do within the iframe, can parameters or data be passed back to my java swing app?

谢谢

推荐答案

您可以查看 JxBrowser 库，可将Google Chromium引擎嵌入Java Swing应用程序中.

You can take a look at JxBrowser library that allows embedding Google Chromium engine into Java Swing applications.

它提供用于Java到JavaScript到Java双向通信的API:

It provides API for two-way communication Java-to-JavaScript-to-Java: http://www.teamdev.com/downloads/jxbrowser/docs/JxBrowser-PGuide.html#javascript-java-bridge

以下代码演示了如何嵌入浏览器组件，加载URL，在加载的网页上调用JavaScript代码以及在JavaScript端注册Java函数，该函数将在每次JavaScript调用时被调用:

The following code demonstrates how to embed Browser component, load URL, invoke JavaScript code on the loaded web page and register Java function on JavaScript side that will be invoked every time when JavaScript invokes it:

import com.teamdev.jxbrowser.chromium.Browser;
import com.teamdev.jxbrowser.chromium.BrowserFactory;
import com.teamdev.jxbrowser.chromium.BrowserFunction;
import com.teamdev.jxbrowser.chromium.JSValue;
import com.teamdev.jxbrowser.chromium.events.FinishLoadingEvent;
import com.teamdev.jxbrowser.chromium.events.LoadAdapter;

/**
 * The sample demonstrates how to register a new JavaScript function and
 * map it to a Java method that will be invoked every time when the JavaScript
 * function is invoked.
 */
public class JavaScriptJavaSample {
    public static void main(String[] args) {
        Browser browser = BrowserFactory.create();
        // Register "MyFunction" JavaScript function and associate Java callback with it
        browser.registerFunction("MyFunction", new BrowserFunction() {
            public JSValue invoke(JSValue... args) {
                for (JSValue arg : args) {
                    System.out.println("arg = " + arg);
                }
                return JSValue.create("Hello!");
            }
        });

        // Create JFrame and embed Browser component to display web pages
        JFrame frame = new JFrame();
        frame.add(browser.getView().getComponent(), BorderLayout.CENTER);
        frame.setSize(800, 600);
        frame.setLocationRelativeTo(null);
        frame.setVisible(true);

        // Register Load listener to get notification when web page is loaded completely
        browser.addLoadListener(new LoadAdapter() {
            @Override
            public void onFinishLoadingFrame(FinishLoadingEvent event) {
                if (event.isMainFrame()) {
                    Browser browser = event.getBrowser();
                    // Invoke our registered JavaScript function
                    JSValue returnValue = browser.executeJavaScriptAndReturnValue(
                            "MyFunction('Hello JxBrowser!', 1, 2, 3, true);");
                    System.out.println("return value = " + returnValue);
                }
            }
        });
        browser.loadURL("about:blank");
    }
}

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