springboot helloworld示例

Spring Boot Hello World 示例:

1. 创建一个 Spring Boot 项目
2. 在项目中新建一个控制器类，如下代码所示:

import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

@RestController
public class HelloController {

    @RequestMapping("/hello")
    public String sayHello() {
        return "Hello Spring Boot";
    }

3. 在项目中新建一个启动类，如下代码所示:

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

@SpringBootApplication
public class HelloApplication {

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

4. 启动项目并在浏览器中访问 localhost:8080/hello, 应该会看到输出 "Hello Spring Boot".