springmvc用于方法鉴权的注解拦截器的解决方案代码

@Documented
@Inherited
@Target({ElementType.METHOD,ElementType.TYPE})
@Retention(RetentionPolicy.RUNTIME)
public @interface Auth {
  boolean validate() default true;
}

public class AuthInterceptor extends BaseInterceptor{
	@Override
	  public Boolean preHandle(HttpServletRequest request,
	      HttpServletResponse response, Object handler) throws Exception {
		if(handler.getClass().isAssignableFrom(HandlerMethod.class)){
			Auth authPassport = ((HandlerMethod) handler).getMethodAnnotation(Auth.class);
			//没有声明需要权限,或者声明不验证权限
			if(authPassport==null){
				return true;
			} else{
				//在这里实现自己的权限验证逻辑
				if(true){
					//如果验证成功返回true（这里直接写false来模拟验证失败的处理）
					System.out.println("执行权限校验了");
					return true;
				} else{
					//如果验证失败
					//返回到登录界面
					//          System.out.println("权限校验对了");
					//          response.sendRedirect("account/login");
					return false;
				}
			}
		} else{
			return true;
		}
	}
}

<mvc:interceptors>
	<bean class="com.benxq.shop.user.interceptors.AuthInterceptor"/>
</mvc:interceptors>

<servlet-mapping>
   <servlet-name>default</servlet-name>
   <url-pattern>*.jpg</url-pattern>
 </servlet-mapping>
 <servlet-mapping>
   <servlet-name>default</servlet-name>
   <url-pattern>*.png</url-pattern>
 </servlet-mapping>