1、创建一个maven工程
填写项目相关信息之后等待项目引入相关依赖
2、在pom.xml中加入以下依赖
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<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.1.9.RELEASE</version>
<relativePath/>
</parent>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
</dependencies>
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3、在main下新建com.syl.MyFirstSpringBootApplication.java
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| package com.syl;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
@SpringBootApplication
public class MySpringBootApplication {
public static void main(String[] args) {
SpringApplication.run(MySpringBootApplication.class, args);
}
}
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4、在main下新建com.syl.controller.MyController.java
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| package com.syl.controller;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;
@Controller
public class MyColtroller {
@ResponseBody
@RequestMapping("/hello")
public String show(){
return "hello world";
}
}
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注意：MyFirstSpringBootApplication.java必须要在MyController.java的同包或者父包中，不然会报404错误
5、测试
浏览器输入http://localhost:8080/hello 回显helloworld表示入门程序创建成功
6、IDEA配置springBoot热部署
添加依赖
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| <dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-devtools</artifactId>
<scope>runtime</scope>
</dependency>
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右上角配置springBootApplication
Running Application Update Policies
On “Update’ action: Update classes and resources
On frame deactivation: Update classes and resources
重启项目即可
7、将项目打包成可执行jar
引入插件
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| <build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
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执行maven的package命令并等待执行完成
执行完成之后在项目目录下找到
target\firstspringboot-1.0-SNAPSHOT.jar
在此处打开命令行并执行
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| java -jar firstspringboot-1.0-SNAPSHOT.jar
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在浏览器中输入http://localhost:8080/hello，一样可以访问该项目
