首先使用Maven匯入必要的jar

<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>springboot</groupId>
  <artifactId
 
>springboot</artifactId>
  <version>0.0.1-SNAPSHOT</version>
  <packaging>jar</packaging>

  <name>springboot</name>
  <url>http://maven.apache.org</url>

  <properties>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding
 
>
  </properties>

  <!-- Spring Boot 啟動父依賴 -->
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>1.3.3.RELEASE</version>
    </parent>



  <dependencies
 
>

  <!-- Spring Boot web依賴 -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>

    <dependency>
      <groupId>junit</groupId>
      <artifactId>junit</artifactId>
      <scope>test</scope>
    </dependency>
  </dependencies>
</project>

加入一個Controller

package cn.springboot.controller;

import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

import cn.springboot.dto.People;

@EnableAutoConfiguration
@RestController
public class HelloController {

    @RequestMapping("/")
    public String sayHello() {
        return "Hello,World!";
    }

    @RequestMapping("/{id}")
    public People getPeople(@PathVariable Integer id) {
        People people = new People();
        people.setId(id);
        people.setAge("13");
        people.setName("lisi");
        return people;
    }
}

• @RestController告訴Spring以字串的形式渲染結果，並直接返回給呼叫者。
• @EnableAutoConfiguration 。這個註解告訴Spring Boot根據新增的jar依賴猜測你想如何配置Spring。

一個啟動類

package cn.springboot.application;

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

import cn.springboot.controller.HelloController;

@SpringBootApplication
public class Application {

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

我們的main方法通過呼叫run，將業務委託給了Spring Boot的SpringApplication類。SpringApplication將引導我們的應用，啟動Spring，相應地啟動被自動配置的Tomcat web伺服器。我們需要將 Example.class 作為引數傳遞給run方法來告訴SpringApplication誰是主要的Spring元件。為了暴露任何的命令列引數，args陣列也會被傳遞過去。

啟動後就可以進行訪問了

結果如下

參考

官方的《Spring Boot Reference Guide》