本文参考 Part II. Getting Started部分

特定版本如1.5.10.RELEASE版本官方文档地址：注：本文基于Spring Boot 1.5.10.RELEASE构建

The has also a you can run.（话说spring-boot在github上已经有23000多颗星了，足见spring-boot火爆程度）

Spring Boot简介

以下介绍引自

Spring Boot makes it easy to create stand-alone, production-grade Spring based Applications that you can "just run". We take an opinionated view of the Spring platform and third-party libraries so you can get started with minimum fuss. Most Spring Boot applications need very little Spring configuration.

Features

• Create stand-alone Spring applications
  创建独立的Spring应用程序
• Embed Tomcat, Jetty or Undertow directly (no need to deploy WAR files)
  直接嵌入Tomcat，Jetty或Undertow（无需部署WAR文件）
• Provide opinionated 'starter' POMs to simplify your Maven
  configuration
  提供自己的'入门'POM来简化你的Maven配置
• Automatically configure Spring whenever possible
  尽可能自动配置Spring
• Provide production-ready features such as metrics, health checks and
  externalized configuration
  提供生产就绪功能，如指标，运行状况检查和外部配置
• Absolutely no code generation and no requirement for XML
  configuration
  绝对不会生成代码，并且不需要XML配置

系统要求

Spring Boot 1.5.10.RELEASE版本需要

and Spring Framework 4.3.14.RELEASE or above 最好java8及以上

构建工具：Maven (3.2+), and Gradle 2 (2.9 or later) and 3.

Servlet容器：

构建工程

这里笔者采用构建Empty Project作为Spring Boot学习过程的总工程，以添加Module的方式构建不同学习过程如springboot-first-app、springboot-redis等

步骤演示

在Idea欢迎页点击Create New Project或File --> New Project，弹出以下界面并选择Empty Project

点击Next，填写Project name如SpringBootLearning

点击Finish完成创建，进入工程Idea会弹出Project Structure窗口，可以点击绿色的+按钮来New Module

也可以通过File --> New --> Module

使用Maven构建第一个Spring Boot应用

以上构建空工程的步骤只是笔者为了自身的系统学习，读者可以直接创建一个Spring Boot工程

方法一：在 在线构建工程再导入到Ide中

方法二：直接在Idea中Create New Project --> Spring Initializr --> 填写group、artifact -->钩上web --> 点下一步就行了，具体步骤参照笔者New Module步骤即可

工程目录结构

pom.xml

    
        
     
      4.0.0
         
     
      cn.fulgens.springbootlearning
         
     
      springboot-first-app-maven
         
     
      0.0.1-SNAPSHOT
         
     
      jar
         
     
      springboot-first-app-maven
         
     
      Demo project for Spring Boot
         
             
      
       org.springframework.boot
              
      
       spring-boot-starter-parent
              
      
       1.5.10.RELEASE
              
       
          
         
             
      
       UTF-8
              
      
       UTF-8
              
      
       1.8
          
         
             
                  
       
        org.springframework.boot
                   
       
        spring-boot-starter-web
               
              
                  
       
        org.springframework.boot
                   
       
        spring-boot-starter-test
                   
       
        test
               
          
         
             
                  
                       
        
         org.springframework.boot
                        
        
         spring-boot-maven-plugin
                    
               
          
     
    

编写HelloController

package cn.fulgens.springbootlearning.springbootfirstappmaven.web;import org.springframework.web.bind.annotation.RequestMapping;import org.springframework.web.bind.annotation.RestController;@RestControllerpublic class HelloController {    @RequestMapping("/")    public String hello() {        return "Hello Spring Boot!";    }}

启动第一个Spring Boot应用

方法一：直接运行SpringbootFirstAppMavenApplication中的main方法

package cn.fulgens.springbootlearning.springbootfirstappmaven;import org.springframework.boot.SpringApplication;import org.springframework.boot.autoconfigure.SpringBootApplication;@SpringBootApplicationpublic class SpringbootFirstAppMavenApplication {    public static void main(String[] args) {        SpringApplication.run(SpringbootFirstAppMavenApplication.class, args);    }}

启动后在浏览器输入localhost:8080

方法二：maven命令启动

cd到项目主目录后执行（其中-Dtest.skip=true表示跳过单元测试）

mvn clean package mvn spring-boot:run -Dtest.skip=true

如果是Gradle构建可执行

gradle buildgradle bootRun

方法三：以java -jar的方式启动

maven打包完成后cd到target目录下执行，jar包名称视自己情况而定

java -jar springboot-first-app-maven-0.0.1-SNAPSHOT.jar

单元测试

package cn.fulgens.springbootlearning.springbootfirstappmaven;import org.junit.Test;import org.junit.runner.RunWith;import org.springframework.beans.factory.annotation.Autowired;import org.springframework.boot.test.autoconfigure.web.servlet.AutoConfigureMockMvc;import org.springframework.boot.test.context.SpringBootTest;import org.springframework.http.HttpMethod;import org.springframework.test.context.junit4.SpringRunner;import org.springframework.test.web.servlet.MockMvc;import org.springframework.test.web.servlet.request.MockMvcRequestBuilders;import org.springframework.test.web.servlet.result.MockMvcResultMatchers;@RunWith(SpringRunner.class)@SpringBootTest@AutoConfigureMockMvcpublic class HelloControllerTest {    @Autowired    private MockMvc mockMvc;    @Test    public void helloControllerTest() throws Exception {        mockMvc.perform(MockMvcRequestBuilders.request(HttpMethod.GET, "/"))                .andExpect(MockMvcResultMatchers.status().isOk())                .andExpect(MockMvcResultMatchers.content().string("Hello Spring Boot!"));    }}

spring boot 1.4.0 版本之前使用以下三个注解，参考

@RunWith(SpringJUnit4ClassRunner.class)@SpringApplicationConfiguration(classes = DemoApplication.class) //在spring boot 1.4.0 版本之后取消了 //classes需要指定spring boot 的启动类如：DemoApplication.class 不然WebApplicationContext不被实例化@WebAppConfiguration