Spring AOP没有@EnableAspectJAutoProxy可以工作吗? [英] Spring AOP works without @EnableAspectJAutoProxy?
问题描述
我正在学习Spring(当前是其AOP框架).即使我阅读过的所有消息都说要启用AOP，也需要使用@EnableAspectJAutoProxy注释(或其XML副本)，但我的代码似乎可以注释掉注释.是因为我使用了Lombok还是Spring Boot(v.1.5.9.RELEASE，取决于Spring v.4.3.13.RELEASE)?
I am learning Spring (currently its AOP framework). Even though all sources I've read say that to enable AOP one needs to use @EnableAspectJAutoProxy annotation (or its XML counterpart) my code seems to work with annotation commented out. Is that because I use Lombok or Spring Boot (v. 1.5.9.RELEASE, dependent on Spring v. 4.3.13.RELEASE)?
最小示例如下:
build.gradle
buildscript {
ext {
springBootVersion = '1.5.9.RELEASE'
}
repositories {
mavenCentral()
}
dependencies {
classpath("org.springframework.boot:spring-boot-gradle-plugin:${springBootVersion}")
}
}
apply plugin: 'java'
apply plugin: 'org.springframework.boot'
group = 'lukeg'
version = '0.0.1-SNAPSHOT'
sourceCompatibility = 1.8
repositories {
mavenCentral()
}
dependencies {
compile('org.springframework.boot:spring-boot-starter')
compileOnly('org.projectlombok:lombok')
compile("org.aspectj:aspectjweaver:1.8.11")
testCompile('org.springframework.boot:spring-boot-starter-test')
}
ApplicationConfiguration.java (请注意，AOP注释已被注释掉)
ApplicationConfiguration.java (note the AOP annotation is commented out)
package lukeg;
import org.springframework.context.annotation.*;
@Configuration
@ComponentScan
//@EnableAspectJAutoProxy
public class ApplicationConfiguration {
@Bean
TestComponent testComponent() {
return new TestComponent();
}
}
LearnApplication.java
package lukeg;
import org.springframework.boot.CommandLineRunner;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.context.ApplicationContext;
import org.springframework.context.annotation.AnnotationConfigApplicationContext;
@SpringBootApplication
public class LearnApplication implements CommandLineRunner {
public static void main(String[] args) {
SpringApplication.run(LearnApplication.class, args);
}
@Override
public void run(String... args) throws Exception {
ApplicationContext context = new AnnotationConfigApplicationContext(ApplicationConfiguration.class);
TestComponent testComponent = context.getBean(TestComponent.class);
System.out.println(""+testComponent);
}
}
LoggerHogger.java
package lukeg;
import org.aspectj.lang.annotation.After;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Before;
import org.aspectj.lang.annotation.Pointcut;
import org.springframework.stereotype.Component;
@Component
@Aspect
public class LoggerHogger {
@Pointcut("execution(* lukeg*.*.toString(..))")
public void logToString() {}
@Before("logToString()")
public void beforeToString () {
System.out.println("Before toString");
}
}
TestComponent.java
package lukeg;
import lombok.Data;
@Data
public class TestComponent {
}
推荐答案
@SpringBootApplication批注包含@EnableAutoConfiguration批注.这种自动配置是Spring Boot的吸引力之一，并使配置更简单.自动配置使用@Conditional类型的批注(如@ConditionalOnClass和@ConditionalOnProperty)扫描类路径并查找触发模块"(如AOP)加载的键类.
The @SpringBootApplication annotation contains the @EnableAutoConfiguration annotation. This autoconfiguration is one of the attractions of Spring Boot and makes configuration simpler. The auto configuration uses @Conditional type annotations (like @ConditionalOnClass and @ConditionalOnProperty) to scan the classpath and look for key classes that trigger the loading of 'modules' like AOP.
