Я хотел бы преобразовать объекты Java в XML и наоборот из неподписанного апплета, и я не могу изменить какие-либо файлы разрешений / политик безопасности или подписать приложение.

Кажется, я получаю исключение безопасности, потому что JAXB пытается получить доступ к полям или конструкторам, которые он не может получить в изолированной программной среде апплета.

Браузер работает под управлением JRE 1.6.0_17

Я также открыт для решений, основанных на какой-то другой библиотеке XML (или JSON), но я попробовал следующее и почти столкнулся с подобной проблемой; - XStream - Gson

Дан (что-то вроде) следующий объект:

@XmlType
@XmlRootElement
public class SimpleObject {

    public String sampleText;

    public SimpleObject() {
    }

    public String getSampleText() {
        return sampleText;
    }

    public void setSampleText(String sampleText) {
        this.sampleText = sampleText;
    }
}

И следующий простой код JAXB:

public void actionPerformed(ActionEvent e) {
    try {
        JAXBContext jc = JAXBContext.newInstance(SimpleObject.class);
        Marshaller marshaller = jc.createMarshaller();
        marshaller.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT, true);

        SimpleObject object = new SimpleObject();
        object.setSampleText("Hello");

        marshaller.marshal(object, System.out);
    }
    catch (JAXBException e1) {
        throw new RuntimeException(e1);
    }
}

Я получаю следующее исключение:

Exception in thread "AWT-EventQueue-2" java.security.AccessControlException: access denied (java.lang.RuntimePermission accessDeclaredMembers)
    at java.security.AccessControlContext.checkPermission(Unknown Source)
    at java.security.AccessController.checkPermission(Unknown Source)
    at java.lang.SecurityManager.checkPermission(Unknown Source)
    at java.lang.SecurityManager.checkMemberAccess(Unknown Source)
    at java.lang.Class.checkMemberAccess(Unknown Source)
    at java.lang.Class.getDeclaredConstructor(Unknown Source)
    at com.sun.xml.internal.bind.v2.model.nav.ReflectionNavigator.hasDefaultConstructor(Unknown Source)
    at com.sun.xml.internal.bind.v2.model.nav.ReflectionNavigator.hasDefaultConstructor(Unknown Source)
    at com.sun.xml.internal.bind.v2.model.impl.ClassInfoImpl.<init>(Unknown Source)
    at com.sun.xml.internal.bind.v2.model.impl.RuntimeClassInfoImpl.<init>(Unknown Source)
    at com.sun.xml.internal.bind.v2.model.impl.RuntimeModelBuilder.createClassInfo(Unknown Source)
    at com.sun.xml.internal.bind.v2.model.impl.RuntimeModelBuilder.createClassInfo(Unknown Source)
    at com.sun.xml.internal.bind.v2.model.impl.ModelBuilder.getClassInfo(Unknown Source)
    at com.sun.xml.internal.bind.v2.model.impl.RuntimeModelBuilder.getClassInfo(Unknown Source)
    at com.sun.xml.internal.bind.v2.model.impl.RuntimeModelBuilder.getClassInfo(Unknown Source)
    at com.sun.xml.internal.bind.v2.model.impl.ModelBuilder.getClassInfo(Unknown Source)
    at com.sun.xml.internal.bind.v2.model.impl.RuntimeModelBuilder.getClassInfo(Unknown Source)
    at com.sun.xml.internal.bind.v2.model.impl.RuntimeModelBuilder.getClassInfo(Unknown Source)
    at com.sun.xml.internal.bind.v2.model.impl.ModelBuilder.getTypeInfo(Unknown Source)
    at com.sun.xml.internal.bind.v2.model.impl.ModelBuilder.getTypeInfo(Unknown Source)
    at com.sun.xml.internal.bind.v2.runtime.JAXBContextImpl.getTypeInfoSet(Unknown Source)
    at com.sun.xml.internal.bind.v2.runtime.JAXBContextImpl.<init>(Unknown Source)
    at com.sun.xml.internal.bind.v2.runtime.JAXBContextImpl$JAXBContextBuilder.build(Unknown Source)
    at com.sun.xml.internal.bind.v2.ContextFactory.createContext(Unknown Source)
    at com.sun.xml.internal.bind.v2.ContextFactory.createContext(Unknown Source)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
    at java.lang.reflect.Method.invoke(Unknown Source)
    at javax.xml.bind.ContextFinder.newInstance(Unknown Source)
    at javax.xml.bind.ContextFinder.find(Unknown Source)
    at javax.xml.bind.JAXBContext.newInstance(Unknown Source)
    at javax.xml.bind.JAXBContext.newInstance(Unknown Source)
    at nz.co.zeal.maker.application.actions.build.JAXBTestAction.actionPerformed(JAXBTestAction.java:24)
    at javax.swing.AbstractButton.fireActionPerformed(Unknown Source)
    at javax.swing.AbstractButton$Handler.actionPerformed(Unknown Source)
    at javax.swing.DefaultButtonModel.fireActionPerformed(Unknown Source)
    at javax.swing.DefaultButtonModel.setPressed(Unknown Source)
    at javax.swing.AbstractButton.doClick(Unknown Source)
    at javax.swing.plaf.basic.BasicMenuItemUI.doClick(Unknown Source)
    at javax.swing.plaf.basic.BasicMenuItemUI$Handler.mouseReleased(Unknown Source)
    at java.awt.Component.processMouseEvent(Unknown Source)
    at javax.swing.JComponent.processMouseEvent(Unknown Source)
    at java.awt.Component.processEvent(Unknown Source)
    at java.awt.Container.processEvent(Unknown Source)
    at java.awt.Component.dispatchEventImpl(Unknown Source)
    at java.awt.Container.dispatchEventImpl(Unknown Source)
    at java.awt.Component.dispatchEvent(Unknown Source)
    at java.awt.LightweightDispatcher.retargetMouseEvent(Unknown Source)
    at java.awt.LightweightDispatcher.processMouseEvent(Unknown Source)
    at java.awt.LightweightDispatcher.dispatchEvent(Unknown Source)
    at java.awt.Container.dispatchEventImpl(Unknown Source)
    at java.awt.Component.dispatchEvent(Unknown Source)
    at java.awt.EventQueue.dispatchEvent(Unknown Source)
    at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source)
    at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source)
    at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)
    at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
    at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
    at java.awt.EventDispatchThread.run(Unknown Source)