文档地址 https://mybatis.plus/guide/interceptor.html#mybatisplusinterceptor

开启乐观锁

@EnableTransactionManagement
@Configuration
public class MyBatisPlusConfig {
    @Bean
    public MybatisPlusInterceptor optimisticLockerInnerInterceptor(){
        MybatisPlusInterceptor interceptor = new MybatisPlusInterceptor();
        interceptor.addInnerInterceptor(new OptimisticLockerInnerInterceptor());
        return interceptor;
    }
}

实体类字段加上

    /**
     * 乐观锁
     */
    @Version
    protected Long version;