自定义注解判断是否要做权限检查

创建一个springboot工程

pom文件中增加

        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-aspects</artifactId>
            <version>5.2.13.RELEASE</version>
        </dependency>

自定义一个注解

@Retention(RetentionPolicy.RUNTIME)//定义注解的使用范围，编译时，还是运行时。。。
@Target(ElementType.METHOD)//定义注解用在哪里class，method。。。
public @interface Login {
    String value() default "";
}

定义一个aop的类

@Aspect
@Component
public class MyAop {

    @Pointcut("execution(public * com.company.aop.annotation.aopannotation.controller.DemoController.*(..))")
    public void pt(){}

    @Before("pt()")
    public void deBefore(JoinPoint joinPoint)  {

        try {
            Class clazz = joinPoint.getTarget().getClass();
            String methodName = joinPoint.getSignature().getName();
            Method method = clazz.getDeclaredMethod(methodName,new Class[]{String.class});
            Login loginAnno = method.getAnnotation(Login.class);
            if(loginAnno!=null){
                System.out.println("检查用户是否登录");
            }else{
                System.out.println("不用检查用户是否登录");
            }
        } catch (Exception ex) {
            System.out.println(ex.toString());
        }
    }
}

启动类

@SpringBootApplication
@EnableAspectJAutoProxy
public class AopAnnotationApplication {

    public static void main(String[] args) {
        SpringApplication.run(AopAnnotationApplication.class, args);
    }

}

controller类

@RestController
public class DemoController {

    @GetMapping("hello1")
    @Login
    public String hello1(String name){
        return "hello1:"+name;
    }

    @GetMapping("hello2")
    public String hello2(String name){
        return "hello2:"+name;
    }
}

访问http://localhost:8080/hello2?name=zhangsan不需要登录检查
访问http://localhost:8080/hello1?name=zhangsan需要登录检查