Spring MVC中创建自定义的注释，并获得HttpServletRequest对象 [英] creating custom annotation in spring mvc and getting httpservletrequest object

问题描述

我要创建自定义的注释，并使用的HttpServletRequest 对象把那个标注方法上水平。到目前为止，我这样做：

I want to create custom annotation and put that annotation on method level using HttpServletRequest object. so far I did this:

创建注释

@Target(value={ElementType.METHOD,ElementType.PARAMETER})
@Retention(value=RetentionPolicy.RUNTIME)
@Documented
@Inherited
@Mapping
public @interface CheckSession{
    boolean isAuthenticate() default false;
}

创建处理程序类

@Component
public class CheckSessionClass implements HandlerMethodReturnValueHandler,HandlerMethodArgumentResolver {




    @Override
    public Object resolveArgument(MethodParameter arg0,
            ModelAndViewContainer arg1, NativeWebRequest arg2,
            WebDataBinderFactory arg3) throws Exception {
        logger.info("......MY ANNOTATION CALLEDD.....resolveArgument");
        return null;
    }


    @Override
    public boolean supportsParameter(MethodParameter arg0) {
        logger.info("......MY ANNOTATION CALLEDD.....supportsParameter");
        return false;
    }


    @Override
    public void handleReturnValue(Object retutnValue, MethodParameter returnType,
            ModelAndViewContainer mavContainer, NativeWebRequest webRequest) throws Exception {
        CheckSession annotation;
        annotation=returnType.getMethodAnnotation(CheckSession.class);
        if(annotation.isAuthenticate()){
logger.info("......got request is aurhenticated..true");
        }else{
            logger.info("......got request is aurhenticated..false");
        }
    }


    @Override
    public boolean supportsReturnType(MethodParameter arg0) {
        logger.info("......MY ANNOTAION CALLEDD.....supportsReturnType");
        return false;
    }

}

创建了一个控制器来调用的注释是这样的。

created a controller to invoke annotation like this.

@Controller
public class MyController 
{
@RequestMapping(method={RequestMethod.GET, RequestMethod.POST})
@CheckSession(isAuthenticate=true)
    public ResponseEntity<String> mymethod (HttpServletRequest request)
    {
            ///my code here....
        }
}

我applicationContext.xml文件配置为汽车零部件扫描，但仍是我的注解类是没有得到任何人called.can让我知道我的错误。

My applicationContext.xml file is configured as auto component scan , but still my annotations class is not getting called.can anyone let me know my mistake.

推荐答案

您还必须配置在拦截你的应用环境（尽管自动扫描）：

You still have to configure the interceptor in your application context (in spite of the auto-scan):

<bean id="checkSession" class="CheckSessionClass"/>

<bean class="org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerMapping">
    <property name="defaultHandler">
        <ref bean="checkSession"/>
    </property>
</bean>

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