SpringBoot的AOP面向切面

1.前言

遇到任务要求：
针对接口封装，所有的接口都要进行封装，并记录接口的调用次数，接口调用的成功与失败error code，以及接口的响应时长
解决办法：
SpringBoot的AOP面向切面编程有五种通知，环绕通知是最为强大的通知，具备了前置通知和后置通知的结合

2.依赖

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <groupId>Wechat</groupId>
    <artifactId>Wechat</artifactId>
    <version>1.0-SNAPSHOT</version>
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>1.3.3.RELEASE</version>
    </parent>
    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
    <!--AOP主要依赖-->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-aop</artifactId>
        </dependency>
    </dependencies>
    <build>
        <finalName>SpringSession</finalName>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>
</project>

3.配置类

import org.aspectj.lang.ProceedingJoinPoint;
import org.aspectj.lang.annotation.Around;
import org.aspectj.lang.annotation.Pointcut;
import org.springframework.stereotype.Component;

@Component
@org.aspectj.lang.annotation.Aspect
public class Aspect {

    //匹配com.wechat.lease.controller包及其子包下的所有类的所有方法
    @Pointcut("execution(* com.wechat.lease.controller..*.*(..))")
    public void executeService() {

    }

    /**
     * 环绕通知： 环绕通知非常强大，可以决定目标方法是否执行，什么时候执行，执行时是否需要替换方法参数，执行完毕是否需要替换返回值。 环绕通知第一个参数必须是org.aspectj.lang.ProceedingJoinPoint类型
     */
    @Around("execution(* com.wechat.lease.controller..*.*(..))")
    public Object doAroundAdvice(ProceedingJoinPoint point) {
        System.out.println("环绕通知被执行，目标方法执行之前");
        try {
            Object obj = point.proceed(); //执行方法
            System.out.println("环绕通知被执行，目标方法执行之后");
            return obj;
        } catch (Throwable throwable) {
            throwable.printStackTrace();
        }
        return null;
    }
}

4.controller类和启动类APP

import org.springframework.context.annotation.Configuration;
import org.springframework.scheduling.annotation.EnableScheduling;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RestController;

@RestController
public class WechatController {
    @RequestMapping(value="/aa", method=RequestMethod.GET)
    public String Wechat(){
        System.out.println("---------------");
        return "开心一刻";
    }
}

启动类
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.context.web.SpringBootServletInitializer;


@SpringBootApplication
public class App extends SpringBootServletInitializer {
        public static void main(String[] args) {
            SpringApplication.run(App.class, args);
        }

}

5.测试结果：

测试结果

指导qq：179061434

demo地址：链接: https://pan.baidu.com/s/1PgM5APWQHOyrFuXeLNh2GQ 密码: v4nj