1.項(xiàng)目結(jié)構(gòu)：

項(xiàng)目結(jié)構(gòu)

1.1 基于Aspect的AOP

1.1.1 父pom.xml配置

<?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>

    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.3.9.RELEASE</version>
    </parent>

    <groupId>com.lance.demo</groupId>
    <artifactId>com-lance-demo</artifactId>
    <version>1.0-SNAPSHOT</version>
    <packaging>pom</packaging>

</project>

1.1.2 module的pom.xml配置

<?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">
    <parent>
        <artifactId>com-lance-demo</artifactId>
        <groupId>com.lance.demo</groupId>
        <version>1.0-SNAPSHOT</version>
    </parent>
    <modelVersion>4.0.0</modelVersion>

    <artifactId>com-lance-demo-provider</artifactId>

    <dependencies>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-aop</artifactId>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>

        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>4.13</version>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>org.apache.commons</groupId>
            <artifactId>commons-lang3</artifactId>
            <version>3.11</version>
        </dependency>

        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId> 
        </dependency>

    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>

</project>

1.1.3 主類：

package com.lance.demo.main;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.context.annotation.ComponentScan;

@ComponentScan("com.lance.demo")
@SpringBootApplication
public class SpringBootDemoMain {

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

1.1.4 MyService.java

package com.lance.demo.service;

import com.lance.demo.exception.MyException;
import org.springframework.stereotype.Service;

@Service
public class MyService {

    public int myFunction() {
        System.out.println("MyFunction execute");
        return 0;
    }

    public int myBizFunction() throws MyException {
        System.out.println("myBizFunction execute");
        return 1;
    }
}

1.1.5 MyAspject.java

package com.lance.demo.aop;

import org.aspectj.lang.JoinPoint;
import org.aspectj.lang.ProceedingJoinPoint;
import org.aspectj.lang.annotation.*;
import org.springframework.stereotype.Component;

@Component
@Aspect
public class MyAspect {

    @Pointcut("execution(public * com.lance.demo.service.*.*(..))")
    public void aspect() {
        System.out.println("aspect");
    }

    @Before("aspect()")
    public void doBefore(JoinPoint joinPoint) {
        System.out.println("doBefore:"+ joinPoint.getArgs() +"," + joinPoint.getSignature());
    }

    @After("aspect()")
    public void doAfter(JoinPoint joinPoint) {
        System.out.println("doAfter:"+ joinPoint.getArgs() +"," + joinPoint.getSignature());
    }

    @AfterReturning("aspect()")
    public void doAfterReturning(JoinPoint joinPoint) {
        System.out.println("doAfterReturning:" + joinPoint.getArgs() +"," + joinPoint.getSignature());
    }

    @AfterThrowing(pointcut = "aspect()",throwing = "e")
    public void deAfterThrowing(JoinPoint joinPoint,Throwable e) {
        if(e == null) {
            System.out.println("deAfterThrowing");
        } else {
            System.out.println("deAfterThrowing:" + e);
        }
    }

    @Around("aspect()")
    public Object deAround(ProceedingJoinPoint joinPoint) throws Throwable {
        System.out.println("deAround before");
        Object object = joinPoint.proceed();
        System.out.println("deAround after");
        return object;
    }
}

1.1.6單元測(cè)試類MyServiceTest

package com.lance.demo.service;

import com.lance.demo.main.SpringBootDemoMain;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
import org.springframework.test.context.web.WebAppConfiguration;

import static org.junit.Assert.*;

@RunWith(SpringJUnit4ClassRunner.class)
@SpringBootTest(classes = SpringBootDemoMain.class)
@WebAppConfiguration
public class MyServiceTest {

    @Autowired
    private MyService myService;

    @Test
    public void myFunction(){
        myService.myFunction();
    }

    @Test
    public void myBizFunction(){
       int result =  myService.myBizFunction();
       System.out.println("result:" + result);
    }
}

1.1.7 輸出結(jié)果：

deAround before
doBefore:[Ljava.lang.Object;@444cc791,int com.lance.demo.service.MyService.myBizFunction()
myBizFunction execute
doAfterReturning:[Ljava.lang.Object;@444cc791,int com.lance.demo.service.MyService.myBizFunction()
doAfter:[Ljava.lang.Object;@444cc791,int com.lance.demo.service.MyService.myBizFunction()
deAround after
result:1

1.2 ControllerAdvice僅對(duì)controller層有效的AOP

1.2.1 MyController.java

package com.lance.demo.controller;

import com.lance.demo.service.MyService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

@RestController
public class MyController {

    @Autowired
    private MyService myService;

    @RequestMapping("/hello")
    public String hello() {
        int result = myService.myFunction();
        return "Hello World!" + result;
    }

    @RequestMapping("/biz/hello")
    public String bizHello() {
        int result = myService.myBizFunction();
        return "Hello World!" + result;
    }
}

1.2.2 GlobalExceptionHandler.java

package com.lance.demo.exception;

import lombok.extern.slf4j.Slf4j;
import org.springframework.web.bind.annotation.ControllerAdvice;
import org.springframework.web.bind.annotation.ExceptionHandler;
import org.springframework.web.bind.annotation.ResponseBody;

@Slf4j
@ControllerAdvice
public class GlobalExceptionHandler {

    @ExceptionHandler(Exception.class)
    @ResponseBody
    public Object exceptionHandler(Exception e) {
        log.error("exceptionHandler error.",e);
        return "Exception";
    }

    @ExceptionHandler(MyException.class)
    @ResponseBody
    public Object myExceptionHandler(Exception e) {
        log.error("myExceptionHandler error.",e);
        return "MyException";
    }
}

1.2.3 自定義異常類MyException.java

package com.lance.demo.exception;

public class MyException extends RuntimeException {

    public MyException(String message) {
        super(message);
    }
}