SpringBoot疾速入门

形式一:应用idea疾速创立SpringBoot我的项目(举荐)

形式二:代码实现

1. 创立Maven工程

应用idea工具创立一个maven工程,该工程为一般的java工程即可

2. 增加SpringBoot的起步依赖

SpringBoot要求,我的项目要继承SpringBoot的起步依赖spring-boot-starter-parent

<parent>    <groupId>org.springframework.boot</groupId>    <artifactId>spring-boot-starter-parent</artifactId>    <version>2.0.1.RELEASE</version></parent>

SpringBoot要集成SpringMVC进行Controller的开发,所以我的项目要导入web的启动依赖

<dependencies>    <dependency>        <groupId>org.springframework.boot</groupId>        <artifactId>spring-boot-starter-web</artifactId>    </dependency></dependencies>

3. 编写SpringBoot疏导类

要通过SpringBoot提供的疏导类起步SpringBoot才能够进行拜访

package com.itheima;import org.springframework.boot.SpringApplication;import org.springframework.boot.autoconfigure.SpringBootApplication;@SpringBootApplicationpublic class MySpringBootApplication {    public static void main(String[] args) {        SpringApplication.run(MySpringBootApplication.class);    }}

4. 编写Controller

在疏导类MySpringBootApplication同级包或者子级包中创立QuickStartController

package com.itheima.controller;import org.springframework.stereotype.Controller;import org.springframework.web.bind.annotation.RequestMapping;import org.springframework.web.bind.annotation.ResponseBody;@Controllerpublic class QuickStartController {        @RequestMapping("/quick")    @ResponseBody    public String quick(){        return "springboot 拜访胜利!";    }    }

5. 测试

执行SpringBoot起步类的主办法,控制台打印日志如下:

.   ____          _            __ _ _ /\\ / ___'_ __ _ _(_)_ __  __ _ \ \ \ \( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \ \\/  ___)| |_)| | | | | || (_| |  ) ) ) )  '  |____| .__|_| |_|_| |_\__, | / / / / =========|_|==============|___/=/_/_/_/ :: Spring Boot ::        (v2.0.1.RELEASE)2018-05-08 14:29:59.714  INFO 5672 --- [           main] com.itheima.MySpringBootApplication      : Starting MySpringBootApplication on DESKTOP-RRUNFUH with PID 5672 (C:\Users\muzimoo\IdeaProjects\IdeaTest\springboot_quick\target\classes started by muzimoo in C:\Users\muzimoo\IdeaProjects\IdeaTest)... ... ...o.s.w.s.handler.SimpleUrlHandlerMapping  : Mapped URL path [/**] onto handler of type [class org.springframework.web.servlet.resource.ResourceHttpRequestHandler]2018-05-08 14:30:03.126  INFO 5672 --- [           main] o.s.j.e.a.AnnotationMBeanExporter        : Registering beans for JMX exposure on startup2018-05-08 14:30:03.196  INFO 5672 --- [           main] o.s.b.w.embedded.tomcat.TomcatWebServer  : Tomcat started on port(s): 8080 (http) with context path ''2018-05-08 14:30:03.206  INFO 5672 --- [           main] com.itheima.MySpringBootApplication      : Started MySpringBootApplication in 4.252 seconds (JVM running for 5.583)

通过日志发现,Tomcat started on port(s): 8080 (http) with context path ''

tomcat曾经起步,端口监听8080,web利用的虚构工程名称为空

关上浏览器拜访url地址为:http://localhost:8080/quick

一些问题

1. 创立我的项目失败

提醒 无奈连贯到 https://start.spring.io/ 或 连贯超时

解决方案

①控制面板零碎和平安Windows 防火墙容许利用通过防火墙,把IDEA勾上

②更改 IDEA设置

点击IDEA setting之后,找到Http Proxy 抉择Atuo-detect proxy settings 之后点击check connection

③还不胜利 更换网络 (网线/wifi/热点)

2. 工程热部署

咱们在开发中重复批改类、页面等资源,每次批改后都是须要重新启动才失效,这样每次启动都很麻烦,节约了大量的工夫,咱们能够在批改代码后不重启就能失效,在 pom.xml 中增加如下配置就能够实现这样的性能,咱们称之为热部署。

<!--热部署配置--><dependency>    <groupId>org.springframework.boot</groupId>    <artifactId>spring-boot-devtools</artifactId></dependency>

留神:IDEA进行SpringBoot热部署失败起因

呈现这种状况,并不是热部署配置问题,其根本原因是因为Intellij IEDA默认状况下不会主动编译,须要对IDEA进行主动编译的设置,如下:

而后 Shift+Ctrl+Alt+/,抉择Registry