Spring Boot学习笔记1——搭建一个简单的Spring Boot项目

1.创建一个Maven项目导入相应的依赖

<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.xx</groupId>
	<artifactId>springboot-sgg</artifactId>
	<version>0.0.1-SNAPSHOT</version>

	<!-- 导入SpringBoot的父依赖,由他来管理依赖版本 -->
	<parent>
		<groupId>org.springframework.boot</groupId>
		<artifactId>spring-boot-starter-parent</artifactId>
		<version>1.5.9.RELEASE</version>
		<relativePath />
	</parent>

	<dependencies>
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-web</artifactId>
		</dependency>
	</dependencies>
</project>

2.创建一个主程序类，这里需要注意我的这个主程序类是放在com.xx这个包下的，会自动扫描com.xx下的所有包

package com.xx;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
/*
 * @SpringBootApplication用于标注一个主程序类,其底层@Import注解会将主配置类所在包下的所有子包里面的所有组件扫描到Spring容器中
 */
@SpringBootApplication
public class HelloWorldMainApplication {

	public static void main(String[] args) {
		//Spring启动入口
		SpringApplication.run(HelloWorldMainApplication.class, args);
	}
}

3.写一个Controller用来测试

package com.xx.controller;

import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;

@Controller
public class HelloController {

	@ResponseBody
	@RequestMapping("/hello")
	public String hello() {
		return "HelloWorld!";
	}
}

4.运行主程序类，输入http://localhost:8080/hello