spring涓璦op涓嶇敓鏁堢殑鍑犵瑙ｅ喅鍔炴硶

Posted 2021-03-02

鏍囩锛?a href='http://www.mamicode.com/so/1/etc' title='etc'>etc   lan   object   contex   rac   璁板綍   exception   signature   

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package com.cnblogs.yjmyzz.springbootdemo.aspect;

import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;

@Retention(RetentionPolicy.RUNTIME)
@Target(ElementType.METHOD)
public @interface Log {

}

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package com.cnblogs.yjmyzz.springbootdemo.aspect;

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.Pointcut;
import org.springframework.stereotype.Component;

import java.lang.reflect.Method;

@Component
@Aspect
public class LogAspect {

    @Pointcut("execution (* com.cnblogs.yjmyzz.springbootdemo.service..*.*(..))")
    public void logPointcut() {

    }

    @Around("logPointcut()")
    public void around(JoinPoint point) {
        String methodName = point.getSignature().getName();
        Object[] args = point.getArgs();
        Class<?>[] argTypes = new Class[point.getArgs().length];
        for (int i = 0; i < args.length; i++) {
            argTypes[i] = args[i].getClass();
        }
        Method method = null;
        try {
            method = point.getTarget().getClass().getMethod(methodName, argTypes);
        } catch (Exception e) {
            e.printStackTrace();
        }
        //鑾峰彇鏂规硶涓婄殑娉ㄨВ
        Log log = method.getAnnotation(Log.class);
        if (log != null) {
            //婕旂ず鏂规硶鎵ц鍓嶏紝璁板綍涓€琛屾棩蹇?            System.out.println("before:" + methodName);
        }
        try {
            //鎵ц鏂规硶
            ((ProceedingJoinPoint) point).proceed();
        } catch (Throwable throwable) {
            throwable.printStackTrace();
        } finally {
            if (log != null) {
                //婕旂ず鏂规硶鎵ц鍚庯紝璁板綍涓€琛屾棩蹇?                System.out.println("after:" + methodName);
            }
        }
    }
}

鍐欎竴涓祴璇昐ervice绫伙細

package com.cnblogs.yjmyzz.springbootdemo.service;

import com.cnblogs.yjmyzz.springbootdemo.aspect.Log;
import org.springframework.stereotype.Component;

@Component
public class HelloService {
    
    @Log
    public void sayHi(String msg) {
        System.out.println("	sayHi:" + msg);
    }

    public void anotherSayHi(String msg) {
        this.sayHi(msg);
    }

}

鏈€鍚庢潵璺戜竴鎶婏細

package com.cnblogs.yjmyzz.springbootdemo;

import com.cnblogs.yjmyzz.springbootdemo.service.HelloService;
import org.springframework.context.annotation.AnnotationConfigApplicationContext;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.EnableAspectJAutoProxy;

/**
 * @author 鑿╂彁鏍戜笅鐨勬潹杩? */
@ComponentScan("com.cnblogs.yjmyzz")
@Configuration
@EnableAspectJAutoProxy
public class SampleApplication {

    public static void main(String[] args) {
        AnnotationConfigApplicationContext context = new AnnotationConfigApplicationContext(SampleApplication.class);
        HelloService helloService = context.getBean(HelloService.class);
        helloService.sayHi("hi-1");
        System.out.println("
");
        helloService.anotherSayHi("hi-2");
    }
}

杈撳嚭濡備笅锛?/p>

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鏈枃涓璈elloService骞朵笉鏄竴涓帴鍙ｏ紝鎵€浠ヤ粠涓婂浘鐨勬柇鐐逛腑鍙互鐪嬪嚭锛屽綋Spring杩愯鏃讹紝HelloService琚鍔犱负...EnhancerBySpringCGLib...銆備絾鏄綋璋冪敤鍒癮notherSayHi鏃?/p>

鏂规硶鐨勮皟鐢ㄦ柟锛屽叾瀹炴槸鍘熷鐨凥elloSerfvice瀹炰緥锛屽嵆锛氭槸鏈粡杩嘢pring AOP澧炲己鐨勫璞″疄渚嬨€傛墍浠ヨВ鍐抽棶棰樼殑鎬濊矾灏辨湁浜嗭紝鎯冲姙娉曠敤澧炲己鍚庣殑HelloService瀹炰緥鏉ヨ皟鐢紒

 

鏂规硶涓€锛氱敤Autowired 娉ㄥ叆鑷韩鐨勫疄渚?/p>

 

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鏂规硶浜?/span>锛氫粠Spring涓婁笅鏂囪幏鍙栧寮哄悗鐨勫疄渚嬪紩鐢?/p>

 

 鍘熺悊涓庢柟娉曚竴鍏跺疄绫讳技锛屼笉澶氳В閲娿€?/p>

 

鏂规硶涓?/span>: 鍒╃敤AopContext

 

涓嶈繃杩欎釜鏂规硶瑕佹敞鎰忕殑鏄紝涓荤被鍏ュ彛涓婏紝蹇呴』鍔犱笂exporseProxy=true锛屽弬鑰冧笅鍥撅細

 

 

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