一、如何学习SpringBoot
官网文档架构
二、Hello World
2.1、系统要求
- Java 8 & 兼容java14 .
- Maven 3.3+
- idea 2019.1.2
maven设置
<mirrors> <mirror> <id>nexus-aliyun</id> <mirrorOf>central</mirrorOf> <name>Nexus aliyun</name> <url>http://maven.aliyun.com/nexus/content/groups/public</url> </mirror> </mirrors> <profiles> <profile> <id>jdk-1.8</id> <activation> <activeByDefault>true</activeByDefault> <jdk>1.8</jdk> </activation> <properties> <maven.compiler.source>1.8</maven.compiler.source> <maven.compiler.target>1.8</maven.compiler.target> <maven.compiler.compilerVersion>1.8</maven.compiler.compilerVersion> </properties> </profile> </profiles>
2.1、创建maven工程
- 引入依赖
<parent> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-parent</artifactId> <version>2.3.4.RELEASE</version> </parent> <dependencies> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> </dependency> </dependencies>
- 创建主程序
/** * 主程序类 * @SpringBootApplication:这是一个SpringBoot应用 */ @SpringBootApplication public class MainApplication { public static void main(String[] args) { SpringApplication.run(MainApplication.class,args); } }
- 编写业务
@RestController public class HelloController { @RequestMapping("/hello") public String handle01(){ return "Hello, Spring Boot 2!"; } }
- 测试:直接运行main方法
- 简化配置
application.properties
server.port=8888
- 简化部署
<build> <plugins> <plugin> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-maven-plugin</artifactId> </plugin> </plugins> </build>
把项目打成jar包,直接在目标服务器执行即可。