问如何在Junit中使用封装的Tomcat 7测试Servlet3.0注释基servlet

EN

@Test
public void testDoGet()
     throws ServletException, LifecycleException, IOException {             
  Tomcat tomcat = new Tomcat();        
  tomcat.setPort(8080);        

  Context ctx = tomcat.addWebapp("/", 
     new File("target").getAbsolutePath());             
  Tomcat.addServlet(ctx, "hello", HelloServlet.class.getName());
  ctx.addServletMapping("/hello", "hello");     
  tomcat.start();

  ByteChunk chunk = new ByteChunk();        
  int responceCode = getUrl("http://127.0.0.1:8080/hello",chunk);

  System.out.println(responceCode + ": " + chunk.toString());

  tomcat.stop();
}