How to customize annotation configuration for simple logging in Spring?

To customize annotation configuration for simple logging in Spring, you can follow these steps:

1. Maintaining a native English language proficiency.
2. Duration
3. Objective

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 Loggable {
    String level() default "INFO";
}

1. Aspect-oriented programming.
2. Surrounding or encircling

import org.aspectj.lang.ProceedingJoinPoint;
import org.aspectj.lang.annotation.Around;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Pointcut;

@Aspect
public class LogAspect {
    @Pointcut("@annotation(Loggable)")
    public void loggablePointcut() {}

    @Around("loggablePointcut() && @annotation(loggable)")
    public Object logAround(ProceedingJoinPoint joinPoint, Loggable loggable) throws Throwable {
        String level = loggable.level();
        switch (level) {
            case "INFO":
                // 使用日志框架打印INFO级别的日志
                break;
            case "DEBUG":
                // 使用日志框架打印DEBUG级别的日志
                break;
            case "ERROR":
                // 使用日志框架打印ERROR级别的日志
                break;
            default:
                break;
        }

        // 执行被注解的方法
        Object result = joinPoint.proceed();

        return result;
    }
}

1. Configure the Spring container: Enable the aspect class by adding the following configuration to the Spring configuration file.

<aop:aspectj-autoproxy />
<bean class="com.example.LogAspect" />

1. Ready to be logged

@Loggable(level = "INFO")
public void doSomething() {
    // ...
}

Therefore, when a method annotated with @Loggable is called, the aspect class will determine the logging level based on the annotation’s attributes and use the corresponding logging framework to print the logs.