Java SpringBoot自定义注解的使用及说明

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

@Target(ElementType.METHOD) // 指定注解适用的目标类型为方法
@Retention(RetentionPolicy.RUNTIME) // 指定注解的保留策略为运行时
@Documented
public @interface LogAnnotation {
    String module() default ""; // 模块名称
    String operation() default ""; // 操作描述
}

import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Before;
import org.aspectj.lang.annotation.Pointcut;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.core.annotation.Order;
import org.springframework.stereotype.Component;

@Aspect
@Component
@Order(1) // 指定切面的顺序
public class LogAspect {
    private static final Logger logger = LoggerFactory.getLogger(LogAspect.class);

    @Pointcut("@annotation(LogAnnotation)") // 定义切点，匹配使用了 LogAnnotation 的方法
    public void logPointcut() {}

    @Before("logPointcut()")
    public void doBefore() {
        logger.info("方法执行前，添加日志记录逻辑");
    }
}

import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

@RestController
@RequestMapping("/api")
public class DemoController {
    @GetMapping("/test")
    @LogAnnotation(module = "测试模块", operation = "测试方法执行")
    public String test() {
        return "Hello, World!";
    }
}

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.context.annotation.ComponentScan;

@SpringBootApplication
@ComponentScan(basePackages = "your.package.name") // 指定扫描的包路径
public class Application {
    public static void main(String[] args) {
        SpringApplication.run(Application.class, args);
    }
}