我假设您已经知道如何创建包（否则，请检查此）。
经过对Reflections API的调试和探索之后，我意识到问题是Reflections根本无法读取OSGi URL（bundleresource：//
…），从而导致异常：
org.reflections.ReflectionsException: could not create Vfs.Dir from url, no matching UrlType was found [bundleresource://1009.fwk651584550/]
和这个建议：
either use fromURL(final URL url, final List<UrlType> urlTypes) or use the static setDefaultURLTypes(final List<UrlType> urlTypes) or addDefaultURLTypes(UrlType urlType) with your specialized UrlType.
因此，我相信为OSGi实现UrlType（例如
class BundleUrlType implements UrlType {...}）并像这样注册它：Vfs.addDefaultURLTypes(new BundleUrlType());
应该从捆绑包内部使Reflections API可用。描述思考的依赖应该被添加到Eclipse插件项目
在这里 。
这是添加所需罐子后的示例MANIFEST.MF的样子：
Manifest-Version: 1.0Bundle-ManifestVersion: 2Bundle-Name: ReflectivePluginBundle-SymbolicName: ReflectivePluginBundle-Version: 1.0.0.qualifierBundle-Activator: reflectiveplugin.ActivatorBundle-ActivationPolicy: lazyBundle-RequiredExecutionEnvironment: JavaSE-1.6import-Package: javax.annotation;version="1.0.0", org.osgi.framework;version="1.3.0", org.osgi.service.log;version="1.3", org.osgi.util.tracker;version="1.3.1"Bundle-ClassPath: ., lib/dom4j-1.6.1.jar, lib/guava-r08.jar, lib/javassist-3.12.1.GA.jar, lib/reflections-0.9.5.jar, lib/slf4j-api-1.6.1.jar, lib/xml-apis-1.0.b2.jarExport-Package: reflectiveplugin, reflectiveplugin.data
注意：Used Reflections v。0.9.5
这是一个示例UrlType实现：
package reflectiveplugin;import java.io.IOException;import java.io.InputStream;import java.net.URL;import java.util.Enumeration;import java.util.Iterator;import org.osgi.framework.Bundle;import org.reflections.vfs.Vfs;import org.reflections.vfs.Vfs.Dir;import org.reflections.vfs.Vfs.File;import org.reflections.vfs.Vfs.UrlType;import com.google.common.collect.AbstractIterator;public class BundleUrlType implements UrlType { public static final String BUNDLE_PROTOCOL = "bundleresource"; private final Bundle bundle; public BundleUrlType(Bundle bundle) { this.bundle = bundle; } @Override public boolean matches(URL url) { return BUNDLE_PROTOCOL.equals(url.getProtocol()); } @Override public Dir createDir(URL url) { return new BundleDir(bundle, url); } public class BundleDir implements Dir { private String path; private final Bundle bundle; public BundleDir(Bundle bundle, URL url) { this(bundle, url.getPath()); } public BundleDir(Bundle bundle, String p) { this.bundle = bundle; this.path = p; if (path.startsWith(BUNDLE_PROTOCOL + ":")) { path = path.substring((BUNDLE_PROTOCOL + ":").length()); } } @Override public String getPath() { return path; } @Override public Iterable<File> getFiles() { return new Iterable<Vfs.File>() { public Iterator<Vfs.File> iterator() { return new AbstractIterator<Vfs.File>() { final Enumeration<URL> entries = bundle.findEntries(path, "*.class", true); protected Vfs.File computeNext() { return entries.hasMoreElements() ? new BundleFile(BundleDir.this, entries.nextElement()) : endOfData(); } }; } }; } @Override public void close() { } } public class BundleFile implements File { private final BundleDir dir; private final String name; private final URL url; public BundleFile(BundleDir dir, URL url) { this.dir = dir; this.url = url; String path = url.getFile(); this.name = path.substring(path.lastIndexOf("/") + 1); } @Override public String getName() { return name; } @Override public String getRelativePath() { return getFullPath().substring(dir.getPath().length()); } @Override public String getFullPath() { return url.getFile(); } @Override public InputStream openInputStream() throws IOException { return url.openStream(); } }}这就是我在Activator类中创建反射的方法：
private Reflections createReflections(Bundle bundle) { Vfs.addDefaultURLTypes(new BundleUrlType(bundle)); Reflections reflections = new Reflections(new Object[] { "reflectiveplugin.data" }); return reflections;}最后一点非常令人困惑，但仍然很重要：如果您在Eclipse（运行方式为/ OSGi
framework）中运行插件，则还必须将类输出目录添加到Reflections路径模式（即“ bin”或“ target / classes”）
”）。但是，对于已发布的插件，不需要（要构建插件/捆绑，请执行“导出”->“可部署的插件和片段”）。
