springBoot方法上或类上面添加@Transactional注解 A调用B问题【亲测】

一、A调用B，B调用C，B或者C加注解

@Component
public class Abc{
    public  void a(ApplyTaskOriginalDataCustomizeMapper applyTaskOriginalDataMapper){
        b(applyTaskOriginalDataMapper);
    }
    
    public  void b(ApplyTaskOriginalDataCustomizeMapper applyTaskOriginalDataMapper){
        c(applyTaskOriginalDataMapper);
    }

    @Transactional(rollbackFor = Throwable.class)
    public void c(ApplyTaskOriginalDataCustomizeMapper applyTaskOriginalDataMapper){
       // mapper操作数据库。。。。。
        throw new RuntimeException("异常！");
    }
}

结论1：A调用B，B调用C，B或者C加注解【无效】

二、A调用B，B调用C，A加注解

@Component
public class Abc{
	@Transactional(rollbackFor = Throwable.class)
    public  void a(ApplyTaskOriginalDataCustomizeMapper applyTaskOriginalDataMapper){
        b(applyTaskOriginalDataMapper);
    }
    
    public  void b(ApplyTaskOriginalDataCustomizeMapper applyTaskOriginalDataMapper){
        c(applyTaskOriginalDataMapper);
    }
   
    public void c(ApplyTaskOriginalDataCustomizeMapper applyTaskOriginalDataMapper){
        // mapper操作数据库。。。。。
        throw new RuntimeException("异常！");
    }
}

结论2：A调用B，B调用C，A加注解【有效】

三、A调用B，B调用C，类加注解

@Component
@Transactional(rollbackFor = Throwable.class)
public class Abc{
	
    public  void a(ApplyTaskOriginalDataCustomizeMapper applyTaskOriginalDataMapper){
        b(applyTaskOriginalDataMapper);
    }
    
    public  void b(ApplyTaskOriginalDataCustomizeMapper applyTaskOriginalDataMapper){
        c(applyTaskOriginalDataMapper);
    }
   
    public void c(ApplyTaskOriginalDataCustomizeMapper applyTaskOriginalDataMapper){
        // mapper操作数据库。。。。。
        throw new RuntimeException("异常！");
    }
}

结论3：A调用B，B调用C，类加注解【有效】

另注：springboot需要加@Component。如果直接new的，无效；

完。