Custom method interceptor @interface belongs to annotation annotation
import java.lang.annotation.ElementType;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import java.lang.annotation.Retention;
@Target(ElementType.METHOD)
@Retention(RetentionPolicy.RUNTIME)
public @interface AccessRequired {
}
Design: Inherit org.springframework.web.servlet.handler.HandlerInterceptorAdapter and override the preHandle method.
accomplish:
xxx-servlet.xml add:
<mvc:interceptors>
<mvc:interceptor>
<mvc:mapping path="/**"/>
<bean class="com.xxx.FrontInterceptor"/>
</mvc:interceptor>
</mvc:interceptors>
front-end interceptor
public class FrontInterceptor implrmrnts HandlerInterceptor{
private static Logger logger=Logger.getLogger(FrontInterceptor.class )
@override
public boolean preHandle(HttpServletRequest request,HttpServletresponse，Object handler){
HandlerMethod handlerMethod = (HandlerMethod) handler;
Method method = handlerMethod.getMethod();
AccessRequired annotation = method.getAnnotation(AccessRequired.class);
if (annotation != null) {
System.out.println("你遇到了：@AccessRequired");
String accessToken = request.getParameter("access_token");
/**
* Do something
*/
response.getWriter().write("没有通过拦截，accessToken的值为：" + accessToken);
}
// 没有注解通过拦截
return true;
}
}