springboot 基于注解路由方法

╰半橙微兮° 2022-05-10 05:50 261阅读 0赞

package com.example.demo13.annotation;
    
    import com.example.demo13.service.AnnoService;
    import org.springframework.beans.factory.annotation.Autowired;
    import org.springframework.web.bind.annotation.GetMapping;
    import org.springframework.web.bind.annotation.RequestMapping;
    import org.springframework.web.bind.annotation.RestController;
    
    @RestController
    @RequestMapping("/anno")
    public class AnnoController {
    
        @Autowired
        private AnnoService annoService;
    
        /**
         * 测试
         * @param requestInt
         * @return
         */
        @GetMapping("/hello")
        public String hello(int requestInt){
    
            return annoService.hello(requestInt);
        }
    }

package com.example.demo13.annotation;
    
    import org.springframework.stereotype.Service;
    
    /**
     * 基于注解来执行默认的还是切面插入的方法
     */
    @Service
    public class AnnotationImpl implements AnnotationInterface {
    
        @Override
        public Object execute(String annotation, Object[] args){
            return "通过注解返回";
        }
    }

package com.example.demo13.annotation;
    
    /**
     * 基于注解来执行默认的还是切面插入的方法
     */
    public interface AnnotationInterface {
    
        public Object execute(String annotation, Object[] args);
    }

package com.example.demo13.annotation;
    
    import org.aspectj.lang.annotation.*;
    import org.springframework.core.annotation.Order;
    import org.springframework.stereotype.Component;
    
    /**
     * 模拟日志
     */
    @Order(98)// 控制多个Aspect的执行顺序，越小越先执行
    @Aspect
    @Component
    public class AspectStyle {
        @Pointcut("execution(* com.example..*.*(..))")
        public void init() {
        }
    
        @Before(value = "init()")
        public void before() {
            System.out.println("方法执行前执行.....");
        }
    
        @AfterReturning(value = "init()")
        public void afterReturning() {
            System.out.println("方法执行完执行.....");
        }
    
        @AfterThrowing(value = "init()")
        public void throwss() {
            System.out.println("方法异常时执行.....");
        }
    
        @After(value = "init()")
        public void after() {
            System.out.println("方法最后执行.....");
        }
    
        /*@Around(value = "init()")
        public Object around(ProceedingJoinPoint pjp) {
            System.out.println("方法环绕start.....");
            Object o = null;
            try {
                o = pjp.proceed();
            } catch (Throwable e) {
                e.printStackTrace();
            }
            System.out.println("方法环绕end.....");
            return o;
        }*/
    }

package com.example.demo13.annotation;
    
    import java.lang.annotation.*;
    
    /**
     * 注解
     */
    @Target({ElementType.METHOD, ElementType.TYPE})
    @Retention(RetentionPolicy.RUNTIME)
    @Documented
    public @interface MyLog {
        String value() default "hello world";
    }

package com.example.demo13.annotation;
    
    import lombok.extern.slf4j.Slf4j;
    import org.apache.commons.lang3.StringUtils;
    import org.aspectj.lang.JoinPoint;
    import org.aspectj.lang.ProceedingJoinPoint;
    import org.aspectj.lang.annotation.Around;
    import org.aspectj.lang.annotation.Aspect;
    import org.aspectj.lang.annotation.Before;
    import org.aspectj.lang.annotation.Pointcut;
    import org.aspectj.lang.reflect.MethodSignature;
    import org.springframework.beans.factory.annotation.Autowired;
    import org.springframework.core.annotation.Order;
    import org.springframework.stereotype.Component;
    
    import java.lang.reflect.Method;
    
    /**
     * 基于注解来配置走老方法还是新切入的方法
     */
    @Order(99) //控制多个Aspect的执行顺序，越小越先执行
    @Aspect
    @Component
    @Slf4j
    public class OperateAspect {
    
        @Autowired
        private AnnotationInterface annoService;
    
        @Pointcut("@annotation(com.example.demo13.annotation.MyLog)")
        public void annotationPointCut() {
        }
    
        @Before("annotationPointCut()")
        public void before(JoinPoint joinPoint) {
            System.out.println(123);
            MethodSignature signature = (MethodSignature)joinPoint.getSignature();
            Method method = signature.getMethod();
            MyLog annotation = method.getAnnotation(MyLog.class);
            String value = annotation.value();
            System.out.println(value);
        }
    
        @Around("annotationPointCut()  && @annotation(annotation)")
        public Object around(ProceedingJoinPoint pjp, MyLog annotation) throws Throwable         {
            System.out.println("方法环绕start.....");
    
            /* 或者这种方式获取annotation MethodSignature signature = (MethodSignature)pjp.getSignature();
            Method method = signature.getMethod();
            MyLog annotation = method.getAnnotation(MyLog.class);*/
            String value = annotation.value();
            Object o ;
            if (StringUtils.equalsIgnoreCase("hello", value)){
                o = pjp.proceed();
            } else {
                Object[] args = pjp.getArgs();
                o = annoService.execute(value, args);
            }
            System.out.println("方法环绕end.....");
            return o;
        }
    }

package com.example.demo13.service;
    
    import com.example.demo13.annotation.MyLog;
    import org.springframework.stereotype.Service;
    
    @Service
    public class AnnoService {
    
        @MyLog("hello world")
        public String hello(int value){
            return "hello world" + value;
        }
    
        public String good(int value){
            return "good world" + value;
        }
    }