Query DOM node value

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查询DOM元素的值

/* * Browser example snippet: query DOM node value * * For a list of all SWT example snippets see * http://dev.eclipse.org/viewcvs/index.cgi/%7Echeckout%7E/platform-swt-home/dev.html#snippets / import org.eclipse.swt.SWT; import org.eclipse.swt.browser.Browser; import org.eclipse.swt.browser.ProgressEvent; import org.eclipse.swt.browser.ProgressListener; import org.eclipse.swt.browser.StatusTextEvent; import org.eclipse.swt.browser.StatusTextListener; import org.eclipse.swt.layout.FillLayout; import org.eclipse.swt.widgets.Display; import org.eclipse.swt.widgets.Shell; public class Snippet160 { public static void main(String[] args) { final String html = "<html><title>Snippet</title><body><p id='myid'>Best Friends</p><p id='myid2'>Cat and Dog</p></body></html>"; Display display = new Display(); final Shell shell = new Shell(display); shell.setLayout(new FillLayout()); final Browser browser = new Browser(shell, SWT.NONE); browser.addStatusTextListener(new StatusTextListener() { public void changed(StatusTextEvent event) { browser.setData("query", event.text); } }); browser.addProgressListener(new ProgressListener() { public void changed(ProgressEvent event) { } public void completed(ProgressEvent event) { / * Use JavaScript to query the desired node content through the * Document Object Model * * Assign result to the window property status to pass the * result to the StatusTextListener This trick is required since * <code>execute</code> does not return the <code>String</code> * directly. / boolean result = browser .execute("window.status=document.getElementById('myid').childNodes[0].nodeValue;"); if (!result) { / * Script may fail or may not be supported on certain * platforms. / System.out.println("Script was not executed."); return; } String value = (String) browser.getData("query"); System.out.println("Node value: " + value); } }); / Load an HTML document */ browser.setText(html); shell.open(); while (!shell.isDisposed()) { if (!display.readAndDispatch()) display.sleep(); } display.dispose(); } }