[springboot 学习1] 快速开始

 

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Spring Quickstart Guide

代码

修改/src/main/java/com/example/demo/DemoApplication.java


package com.example.demo;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.RestController;

@SpringBootApplication
@RestController
public class DemoApplication {

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

    @GetMapping("/hello")
    public String hello(@RequestParam(value = "name", defaultValue = "World") String name) {
        return String.format("Hello %s!", name);
    }
}

运行

maven构建使用:

./mvnw spring-boot:run

gradle构建使用:

./gradlew bootRun

打开浏览器查看:http://localhost:8080/hello

可传入参数:?name=xyz

@SpringBootApplication将3个注解组合在一起@Configuration@ComponentScan@EnableAutoConfiguration