使用eclipse创建第一个SpringBoot项目

1、new->maven->maven project,   勾选 Create a simple project，  下一个页面中填入group id（项目组织唯一标识, 如org.apache）和artifact id（应用名，本例子中为

SpringApplicationDemo），其他默认

2、配置pom.xml

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
      <modelVersion>4.0.0</modelVersion>
    <groupId>com.admin</groupId>
    <artifactId>SpringTest</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <packaging>jar</packaging>

    <name>SpringApplicationDemo</name>
    <description>Demo project for Spring Boot</description>

    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.0.3.RELEASE</version>
        <relativePath /> <!-- lookup parent from repository -->
    </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>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>
</project>

3、在src/main/java下新建包com.admin，新建类Application，作为程序入口

@SpringBootApplication
public class Application {

    public static void main(String[] args) {
        SpringApplication.run(Application.class, args);
    }
}

在包下新建类Controller类， 这里新建HelloController类

@RestController
public class HelloController {
    
    @RequestMapping("/hello")
    public String test() {
        return "Hello, World!";
    }
}

4、在src/main/resources下新建application.properties文件，写上

   server.port=8080

5、run as -> java application, 等待启动成功（查看console输出），

6、在浏览器中输入http://localhost:8080/hello

  即可在浏览器中看到HelloController类中hello对应的字符串