JxBrowser提供了允许将Java对象注入JavaScript代码的功能。默认情况下，可以从JavaScript访问注入的Java对象的所有公共字段和方法，因此JavaScript代码可以访问它们。要告诉JavaScript代码可以从JavaScript访问注入的Java对象的公共字段/方法，可以使用@JSAccessible注释。如果您需要让JavaScript代码只访问特定的公共字段/方法，则必须使用@JSAccessible注释标记它们。例如： ``` public class JavaObject { @JSAccessible public String accessibleField; public String nonAccessibleField; public void doAction() { } @JSAccessible public void doAccessibleAction() { } } ``` 如果将JavaObject注入JavaScript代码，那么JavaScript将只能访问accessibleField公共字段和doAccessibleAction（）公共方法。如果JavaScript尝试访问其他公共字段或方法，则会抛出JavaScript代码中的异常。 完整的例子： ``` import com.teamdev.jxbrowser.chromium.Browser; import com.teamdev.jxbrowser.chromium.JSAccessible; import com.teamdev.jxbrowser.chromium.JSValue; import com.teamdev.jxbrowser.chromium.swing.BrowserView; import javax.swing.*; import java.awt.*; /** * The sample demonstrates how to inject Java object into JavaScript code and * tell JavaScript what public fields and methods JavaScript can access via the * JSAccessible annotation. See comments in the example. */ public class JavaScriptJavaJSAccessibleSample { public static void main(String[] args) { Browser browser = new Browser(); BrowserView view = new BrowserView(browser); JFrame frame = new JFrame(); frame.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE); frame.add(view, BorderLayout.CENTER); frame.setSize(700, 500); frame.setLocationRelativeTo(null); frame.setVisible(true); JSValue window = browser.executeJavaScriptAndReturnValue("window"); // Inject Java object into JavaScript and associate it with // the 'window.javaObject' property. JavaObject javaObject = new JavaObject(); window.asObject().setProperty("javaObject", javaObject); // You can access public field marked with the JSAccessible annotation // of the injected Java object and modify their values. browser.executeJavaScriptAndReturnValue( "window.javaObject.accessibleField = 'Hello from JavaScript!';"); // Access to public field that isn't marked with the JSAccessible // annotation will be denied and cause an error in JavaScript. browser.executeJavaScriptAndReturnValue( "window.javaObject.nonAccessibleField = 'Hello from JavaScript again!';"); // Print a new value of the accessibleField. System.out.println("accessibleField = " + javaObject.accessibleField); System.out.println("nonAccessibleField = " + javaObject.nonAccessibleField); } /** * The class has two public fields. The 'accessibleField' public field marked * with the JSAccessible annotation. The 'nonAccessibleField' public field * isn't. If at least one public field of method is marked with the * JSAccessible annotation, it means that only public fields and methods with * this annotation can be accessed from JavaScript. Access to other public * fields or methods will cause an error in JavaScript. If class or its * superclass doesn't have public fields or methods marked with the * JSAccessible annotation, then it means that all public fields and methods * can be accessed from JavaScript. */ public static class JavaObject { @JSAccessible public String accessibleField; public String nonAccessibleField; } } ```