不支持你这么搞

最简复现: MainApplication.java

@SpringBootApplication public class MainApplication { public static void main(String[] args) { SpringApplication.run(MainApplication.class, args); } }

application.properties

spring.datasource.url=url... spring.datasource.username=user... spring.datasource.password=pwd...

注意这里，加上后insertFill就不再起作用！！！

mybatis-plus.configuration.global-config.banner=false

DemoEntity.java

@Getter @Setter @TableName("t_demo") public class DemoEntity implements Serializable {

private static final long serialVersionUID = 1L;
@TableId(type = IdType.AUTO)
private Long id;

@TableField(fill = FieldFill.INSERT)
private Date createTime;

@TableField(fill = FieldFill.INSERT_UPDATE)
private Date updateTime;

@TableField(select = false)
private Integer isDeleted;

}

DemoMapper.java

@Mapper public interface DemoMapper extends BaseMapper { }

DemoTest.java

@Component @RequiredArgsConstructor public class DemoTest implements ApplicationListener { private final DemoMapper demoMapper;

@Override
public void onApplicationEvent(ApplicationReadyEvent event) {
    demoMapper.insert(new DemoEntity());
}

}

这个例子中，只要配置文件中配置了mybatis-plus.configuration.global-config前缀的任何属性，insertFill就会失效，因为只要配置了，MybatisConfigruation.setGlobalConfig就会被调用，之后再去调用GlobalConfigUtils.setGlobalConfig就无法覆盖了；

@miemieYaho 你看下

Originally posted by @heylear in https://github.com/baomidou/mybatis-plus/issues/3024#issuecomment-721119998

Comment From: miemieYaho

https://github.com/baomidou/mybatis-plus/blob/3.0/mybatis-plus-boot-starter/src/main/java/com/baomidou/mybatisplus/autoconfigure/MybatisPlusProperties.java 117行

https://github.com/baomidou/mybatis-plus/blob/3.0/mybatis-plus-core/src/main/java/com/baomidou/mybatisplus/core/MybatisConfiguration.java

Comment From: miemieYaho

Comment From: heylear

在注入MybatisPlusProperties时因为设置了mybatis-plus.configuration.global-config.banner属性会在bind过程中调用MybatisPlusProperties.configuration.setGlobalConfig方法，正如图所示的debug位置, 此时GlobalConfigUtils.GLOBAL_CONFIG已经有值了，然后待sqlfactory初始化后再去GlobalConfigUtils.setGlobalConfig由于使用putIfAbsent导致后面的metaObjectHandler没有设置生效 @miemieYaho 感谢大神的耐心解答，纯属交流，我项目可以移除这行配置，不影响业务；issue不再重开； 另：抱歉上面示例中没有贴自定义MetaObjectHandler类