使用javafx从webview获取内容 [英] get the contents from the webview using javafx

问题描述

我正在使用JAVA FX控件处理swing应用程序。在我的应用程序中，我必须打印出webview中显示的html页面。我正在尝试的是在HtmlDocuement的帮助下将webview的html内容加载到字符串中。

I am working on a swing application using JAVA FX controls . In my application i have to take print out the html page displayed in the webview . What I am trying is to load the html content of webview in a string with the help of HtmlDocuement.

要从Web视图加载html文件的内容，我正在使用以下代码但不起作用：

To load the content of html file from web view,I am using the following code but its not working:

try
{
    String str=webview1.getEngine().getDocment().Body().outerHtml();
}
catch(Exception ex)
{
}

推荐答案

WebEngine.getDocument 返回 org.w3c.dom.Document ，而不是您期望通过代码判断的JavaScript文档。

WebEngine.getDocument returns org.w3c.dom.Document, not JavaScript document which you expect judging by your code.

不幸的是，打印 org.w3c.dom.Document 需要相当多的编码。您可以尝试将org.w3c.dom.Document打印到stdout的最短方法是什么？，请参阅下面的代码。

Unfortunately, printing out org.w3c.dom.Document requires quite a bit of coding. You can try the solution from What is the shortest way to pretty print a org.w3c.dom.Document to stdout?, see code below.

请注意，您需要等到在使用 Document 之前加载文档。这就是为什么 LoadWorker 在这里使用的原因：

Note that you need to wait until the document is loaded before working with Document. This is why LoadWorker is used here:

public void start(Stage primaryStage) {
    WebView webview = new WebView();
    final WebEngine webengine = webview.getEngine();
    webengine.getLoadWorker().stateProperty().addListener(
            new ChangeListener<State>() {
                public void changed(ObservableValue ov, State oldState, State newState) {
                    if (newState == Worker.State.SUCCEEDED) {
                        Document doc = webengine.getDocument();
                        try {
                            Transformer transformer = TransformerFactory.newInstance().newTransformer();
                            transformer.setOutputProperty(OutputKeys.OMIT_XML_DECLARATION, "no");
                            transformer.setOutputProperty(OutputKeys.METHOD, "xml");
                            transformer.setOutputProperty(OutputKeys.INDENT, "yes");
                            transformer.setOutputProperty(OutputKeys.ENCODING, "UTF-8");
                            transformer.setOutputProperty("{http://xml.apache.org/xslt}indent-amount", "4");

                            transformer.transform(new DOMSource(doc),
                                    new StreamResult(new OutputStreamWriter(System.out, "UTF-8")));
                        } catch (Exception ex) {
                            ex.printStackTrace();
                        }
                    }
                }
            });
    webengine.load("http://stackoverflow.com");
    primaryStage.setScene(new Scene(webview, 800, 800));
    primaryStage.show();
}

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