java类。getAnnotation和getAnnotations无法正常工作

Question

来自gwt的类SecureDispatchService如下所示：

@RemoteServiceRelativePath("dispatch")
public interface SecureDispatchService extends RemoteService {
    Result execute( String sessionId, Action<?> action ) throws DispatchException;
}

RemoteServiceRelativePath

@Documented
@Retention(RetentionPolicy.RUNTIME)
@Target(ElementType.TYPE)
public @interface RemoteServiceRelativePath {
  /**
   * The relative path for the {@link RemoteService} implementation.
   * 
   * @return relative path for the {@link RemoteService} implementation
   */
  String value();
}

测试代码非常简单：

package com.name.sbts.wbts.sm;

import net.customware.gwt.dispatch.client.secure.SecureDispatchService;
import com.google.gwt.user.client.rpc.RemoteServiceRelativePath;

public class TestClass {

    public static void main(String[] args) {

        Class c = SecureDispatchService.class;
        System.out.println(c.getAnnotation(RemoteServiceRelativePath.class));
        System.out.println(c.getAnnotations().length);
    }
}

但结果并不理想：

null
0

我在eclipse中用JRE1运行这段代码。七,

SecureDispatchService在谷歌的这个罐子里：

gwt-dispatch-1.2.0.jar

我用mvn eclipse:eclipse生成了这个项目。 这个jar文件是eclipse项目的一个参考库，它的实际路径在我的。m2/个故事