springBoot+mybatis-plus 使用AOP 简单实现一个操作日志demo，保存操作记录到数据库

1、引入AOP依赖

<!--aop-->
<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-aop</artifactId>
</dependency>
 <!--mybatis-plus-->
<dependency>
    <groupId>com.baomidou</groupId>
    <artifactId>mybatis-plus-boot-starter</artifactId>
    <version>3.4.3.1</version>
</dependency>

2、自定义注解

@Target(ElementType.METHOD)
@Retention(RetentionPolicy.RUNTIME)
public @interface Log {
    String operation() default "";
}

3、aop文件

@Aspect
@Component
public class LogAspectAop {

    /**
     * 定义@Before增强，拦截带有@Log注解的方法，并记录操作日志
     */
    @Before("@annotation(com.example.demo.log.Log)")
    public void before(JoinPoint joinPoint){
        // 获取目标方法名
        String methodName = joinPoint.getSignature().getName();
        // 获取目标方法参数
        Object[] args = joinPoint.getArgs();
        // 获取Log注解信息
        MethodSignature signature = (MethodSignature) joinPoint.getSignature();
        Method method = signature.getMethod();
        Log log = method.getAnnotation(Log.class);

        // 记录操作日志，插入数据库，根据自己业务需求编写，我这里只是简单示范
        OperateLog operateLog =  OperateLog.builder().operateUser("hzs").operateName(log.operation()).methodName(methodName).params(Arrays.toString(args)).createTime(new Date()).build();
        operateLogService.save(operateLog);
            
    }

    @Resource
    private OperateLogService operateLogService;

}

4、随便写一个测试controller文件

@RestController
@RequestMapping("test")
public class testController {

    @Log(operation = "获取数据")
    @GetMapping(value = "hello/{id}")
    public String get(@PathVariable("id") Long id){
        return "ok";
    }

}

5、OperateLog 类，对应数据库表，这里一般还会有ip地址等其他重要字段，我这里只是简单示范

@Data
@Builder
@TableName("tb_operate_log")
public class OperateLog {
    //主键
    @TableId(type = IdType.AUTO)
    private Long id;
    //操作员
    private String operateUser;
    //操作接口注释名
    private String operateName;
    //方法名
    private String methodName;
    //参数
    private String params;
    //操作时间
    private Date createTime;
    
}

5、IOperateLogService 文件

public interface IOperateLogService extends IService<OperateLog> {
}

6、OperateLogServiceImpl 文件

@Service
public class OperateLogServiceImpl extends ServiceImpl<OperateLogMapper, OperateLog> implements IOperateLogService{
}

7、mapper文件

@Mapper
public interface OperateLogMapper extends BaseMapper<OperateLog> {
}