boot

SpringBoot面试题及答案整理

邮差的信 提交于 2019-12-25 10:40:05
1、什么是 Spring Boot? 多年来,随着新功能的增加,spring 变得越来越复杂。访问spring官网页面,我们就会看到可以在我们的应用程序中使用的所有 Spring 项目的不同功能。如果必须启动一个新的 Spring 项目,我们必须添加构建路径或添加 Maven 依赖关系,配置应用程序服务器,添加 spring 配置。因此,开始一个新的 spring 项目需要很多努力,因为我们现在必须从头开始做所有事情。 Spring Boot 是解决这个问题的方法。Spring Boot 已经建立在现有 spring 框架之上。使用 spring 启动,我们避免了之前我们必须做的所有样板代码和配置。因此,Spring Boot 可以帮助我们以最少的工作量,更加健壮地使用现有的 Spring功能。 2、Spring Boot 有哪些优点? Spring Boot 的优点有: 1、减少开发,测试时间和努力。 2、使用 JavaConfig 有助于避免使用 XML。 3、避免大量的 Maven 导入和各种版本冲突。 4、提供意见发展方法。 5、通过提供默认值快速开始开发。 6、没有单独的 Web 服务器需要。这意味着你不再需要启动 Tomcat,Glassfish或其他任何东西。 7、需要更少的配置 因为没有 web.xml 文件。只需添加用@ Configuration 注释的类

How to configure a system-wide package in osgi?

≡放荡痞女 提交于 2019-12-25 08:47:53
问题 I need to made available a library to some bundles. This library makes use of RMI, so it needs (as far as I know, at least) to use the system class loader in order to work (I tried to "osgi-fy" the library, which results in classcastexceptions at runtime). So what I did was to remove the dependencies from the bundles that use that library, compile them with the library included in the property jars.extra.classpath (in the build.properties of the eclipse project). Then I added org.osgi

Cosmos(ZYNQ)编译运行Linux系统

岁酱吖の 提交于 2019-12-25 08:01:17
Author:Gary Data:2019-12-24 Ref: ug1144-petalinux-tools-reference-guide.pdf https://www.cnblogs.com/vacajk/p/6146146.html https://www.cnblogs.com/likaiwei/p/10223354.html https://blog.csdn.net/mcupro/article/details/91973744 https://blog.csdn.net/lulugay/article/details/99715402 https://www.shuzhiduo.com/A/ke5jxXQOzr/ http://www.openssd.io/ 文章目录 一.PetaLinux安装 二.PetaLinux编译配置 三.PetaLinux编译 四.PetaLinux镜像部署 五.Cosmos上电启动 由于项目所需,我需要在Cosmos开发板上运行Linux系统。Cosmos是一块用于开发SSD的开发板,开发板的主要部件是一颗ZYNQ芯片和两块OpenChannelSSD,Cosmos项目主页: http://www.openssd.io/ 。Cosmos上所搭载的ZYNQ型号为Xilinx Zynq-7000 AP SoC (XC7Z045

spring boot @Scheduled未生效原因

末鹿安然 提交于 2019-12-25 07:37:19
spring boot @Scheduled未生效原因以及相关坑 在spring boot中,支持多种定时执行模式(cron, fixRate, fixDelay),在Application或者其他Autoconfig上增加 @EnableScheduling注解开启。 然后在指定方法增加@Scheduled注解,如下: @Scheduled(cron="0 0 0/1 * * ?") public void updateTime() { current_log_time_appendix = sdf.format(new Date()); logger.info("日志文件切换, 切换后为:" + current_log_time_appendix); } 需要注意的是,如果在多个函数上使用了@Scheduled,那么一定是一个执行完毕,才能排下一个。这往往不是我们想要的效果。此时需要在Scheduling配置类为schedule返回一个预定的线程池,如下: @Configuration @EnableScheduling public class SchedulingConfiguration { @Bean(destroyMethod = "shutdown") public Executor taskScheduler() { return Executors

Allowing service time to start up

僤鯓⒐⒋嵵緔 提交于 2019-12-25 06:25:11
问题 I wish to enable automatic login to my app, yet the problem that is arising is that the service is being started and bound after the automatic login features are being called: 04-28 20:21:09.061 5427-5427/com.example.feastapp I/PersonaManager﹕ getPersonaService() name persona_policy 04-28 20:21:09.081 5427-5427/com.example.feastapp V/AUTO LOGIN TEST﹕ Waiting... 1/5 @ 268919454 04-28 20:21:14.086 5427-5427/com.example.feastapp V/AUTO LOGIN TEST﹕ Waiting... 2/5 @ 268924454 04-28 20:21:19.081

Does sysfs procfs devtmpfs mounted by kernel?

醉酒当歌 提交于 2019-12-25 05:50:05
问题 I'm looking into systemd. I thought systemd would mount sysfs(/sys), procfs(/proc), devtmpfs(/dev) during booting after kernel initialization. But my systemd debugging log show that systemd doesn't mount such file systems.(it only mounts cgroups, securityfs, etc...) By when, and whom does such file system is mounted? Does kernel mount sys, proc, dev? 回答1: Yes, those are mounted by systemd PID1, see src/core/mount-setup.c in the systemd sources. 回答2: First point: the Linux kernel can't mount

Install a msi at system startup time

时间秒杀一切 提交于 2019-12-25 05:16:13
问题 I have a bootable disk from a machine which is mounted on another machine. I need to make the bootable disk ready so that when i create a machine using that mounted bootable disk some of the msi's are installed. What is the best way to run the msi's at system startup without knowing the instance credentials? Note : I have tried using RunOnce and AutoAdminLogon, it works but i need to know the credentials for this method. Also, since i have only the bootable disk i need to use methods which

Install a msi at system startup time

流过昼夜 提交于 2019-12-25 05:16:02
问题 I have a bootable disk from a machine which is mounted on another machine. I need to make the bootable disk ready so that when i create a machine using that mounted bootable disk some of the msi's are installed. What is the best way to run the msi's at system startup without knowing the instance credentials? Note : I have tried using RunOnce and AutoAdminLogon, it works but i need to know the credentials for this method. Also, since i have only the bootable disk i need to use methods which

SpringBoot2.0项目集成Mybatis3、Druid、Mapper、PageHelper、Redis、Shiro、Swagger2、Log4j2 之IDEA搭建SpringBoot(一)

风流意气都作罢 提交于 2019-12-25 04:38:04
参考项目: https://github.com/zzycreate/spring-boot-seed Mapper: 摘自:https://mapperhelper.github.io/changelog/ SpringBoot: 摘自:https://www.jianshu.com/c/355260609973 什么是SpringBoot:   其设计目的是用来简化新Spring应用的初始搭建以及开发过程。该框架使用了特定的方式来进行配置,从而使开发人员不再需要定义样板化的配置。   从最根本上来讲,Spring Boot就是一些库的集合,它能够被任意项目的构建系统所使用。 为什么要用Sping Boot:    Spring Boot项目就是为了解决Spring配置繁琐的问题,最大化的实现convention over configuration(约定大于配置)。 SpringBoot的特点: 创建独立的Spring应用程序 嵌入的Tomcat,无需部署WAR文件 简化Maven配置 自动配置Spring 提供生产就绪型功能,如指标,健康检查和外部配置 绝对没有代码生成并且对XML也没有配置要求 IDEA快速搭建SpringBoot2.0: 来源: https://www.cnblogs.com/aaronRhythm/p/12094540.html

SpringBoot概述

不想你离开。 提交于 2019-12-25 03:52:46
SpringBoot概述 主要学习内容 Spring Boot的主要功能 SPring Boot只是一个 工具帮我们简化应用程序的配置过程,让Spring应用开发变得”简单粗暴“。 下面是Spring应用开发和Spring Boot应用开发的流程对比 SpringBoot应用开发流程及核心特性 来源: CSDN 作者: 紫蝶侠 链接: https://blog.csdn.net/yangshengwei230612/article/details/103686386