如何获取spring mvc中的拦截器的bean
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2022-07-13 14:35:21
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举个例子Test2Interceptor要获取TestInterceptor来操作
得出原来spring mvc把<mvc:interceptors>配置的bean放到MappedInterceptor实例中
咱们看下MappedInterceptor源码
这里得出MappedInterceptor 持有HandlerInterceptor实例对象,HandlerInterceptor也就是我们刚刚写的拦截器的要实践的接口。
这样我们就明白了,大功告成。
<mvc:interceptors> <mvc:interceptor> <mvc:mapping path="/**"/> <bean class="com.xxx.TestInterceptor"> </bean> </mvc:interceptor> <mvc:interceptor> <mvc:mapping path="/**"/> <bean class="com.xxx.Test2Interceptor"> </bean> </mvc:interceptor> </mvc:interceptors>
public class TestInterceptor implements HandlerInterceptor { }
public class Test2Interceptor implements HandlerInterceptor,ApplicationContextAware { private ApplicationContext applicationContext; public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object object) throws Exception { Map<String,MappedInterceptor> map = applicationContext.getBeansOfType(MappedInterceptor.class); for(MappedInterceptor m : map.values()) { if(m.getInterceptor() instanceof TestInterceptor) { System.out.println(m.getInterceptor()); } } } public void setApplicationContext(ApplicationContext applicationContext) throws BeansException { this.applicationContext = applicationContext; } }
得出原来spring mvc把<mvc:interceptors>配置的bean放到MappedInterceptor实例中
咱们看下MappedInterceptor源码
public final class MappedInterceptor { private final String[] includePatterns; private final String[] excludePatterns; private final HandlerInterceptor interceptor; //省略 }
这里得出MappedInterceptor 持有HandlerInterceptor实例对象,HandlerInterceptor也就是我们刚刚写的拦截器的要实践的接口。
这样我们就明白了,大功告成。
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