我一直按照here的说明使用注解并覆盖DefaultAnnotationHandlerMapping来实现spring mvc handler拦截器。
但是,我的拦截器从未被调用。
有人可以在这里看到我做错了吗?
我已经在博客文章中实现了@Interceptors。
我创建了一个拦截器:
@Component
public class InterceptorSpike extends HandlerInterceptorAdapter {
public InterceptorSpike() {
System.err.println("InterceptorSpike initialised");
}
@Override
public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
throw new RuntimeException("Yay, intercepted!");
}
}
和一个测试控制器:
@Controller
@Interceptors({InterceptorSpike.class})
public class TestController {
@RequestMapping(value = "/test", method = RequestMethod.GET)
public void doSomething() {
System.err.println("I'm doing something, have I been intercepted??");
}
}
我的处理程序示例(与博客文章基本相同)
@Component
public class HandlerInterceptorAnnotationAwareHandlerMapping extends DefaultAnnotationHandlerMapping {
public HandlerInterceptorAnnotationAwareHandlerMapping() {
System.err.println("HandlerInterceptorAnnotationAwareHandlerMapping initialised");
}
...
[编辑-忽略,为了完整性。我已将这些步骤恢复为再次使用自动装配]
我最初使用@Component将其自动连线,但由于尝试了不同的修复程序,因此将其移至应用程序上下文中。
我添加了订单,但没有使用
<mvc:annotation-driven/>
。这些是我在寻找解决方案时的一些帖子提出的。[/编辑]
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:context="http://www.springframework.org/schema/context"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsd"
default-autowire="byName">
<context:component-scan base-package="com.xxx"/>
<context:spring-configured/>
<!-- removed manual wiring -->
</beans>
最后,这是我的测试:
@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(locations = {"/test-app-context.xml"})
public class ControllerInterceptorTest {
@Autowired
private ApplicationContext applicationContext;
@Autowired
private TestController controller;
@Test
public void shouldInterceptMethod() {
Map<String, DefaultAnnotationHandlerMapping> mappings = applicationContext.getBeansOfType(DefaultAnnotationHandlerMapping.class);
for (String key : mappings.keySet()) {
DefaultAnnotationHandlerMapping mapping = mappings.get(key);
System.out.println(String.format("key [%s], order [%s], value = %s", key, mapping.getOrder(), mapping.getClass().getCanonicalName()));
}
controller.doSomething();
fail("should have thrown exception");
}
}
我得到以下输出:
HandlerInterceptorAnnotationAwareHandlerMapping initialised
InterceptorSpike initialised
key [handlerInterceptorAnnotationAwareHandlerMapping], order [2147483647], value = com.xxx.interceptors.HandlerInterceptorAnnotationAwareHandlerMapping
I'm doing something, have I been intercepted??
java.lang.AssertionError: should have thrown exception
at org.junit.Assert.fail(Assert.java:91)
...
从不调用我新的DefaultAnnotationHandlerMapping上的getHandlerExecutionChain。
感谢您阅读本文至今-我知道这里有很多东西!
谁能看到我错过或做错的事情?
谢谢!
最佳答案
问题可能在此行中:
private TestController controller = new TestController();
您需要从上下文中获取“控制器句柄”,而不是初始化自己。