spring_reference/spring_boot_start.md

Spring Boot初级教程
=======================

### 一. Spring Boot安装
环境要求：Java 8，Maven 3.2或Gradle 1.12

#### 1.Maven方式
<pre>
&lt;?xml version="1.0" encoding="UTF-8"?&gt;
&lt;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"&gt;

    &lt;modelVersion&gt;4.0.0&lt;/modelVersion&gt;
    &lt;groupId&gt;com.example&lt;/groupId&gt;
    &lt;artifactId&gt;myproject&lt;/artifactId&gt;
    &lt;version&gt;0.0.1-SNAPSHOT&lt;/version&gt;

    &lt;!-- Inherit defaults from Spring Boot --&gt;
    &lt;parent&gt;
        &lt;groupId&gt;org.springframework.boot&lt;/groupId&gt;
        &lt;artifactId&gt;spring-boot-starter-parent&lt;/artifactId&gt;
        &lt;version&gt;1.2.1.RELEASE&lt;/version&gt;
    &lt;/parent&gt;

    &lt;!-- Add typical dependencies for a web application --&gt;
    &lt;dependencies&gt;
        &lt;dependency&gt;
            &lt;groupId&gt;org.springframework.boot&lt;/groupId&gt;
            &lt;artifactId&gt;spring-boot-starter-web&lt;/artifactId&gt;
        &lt;/dependency&gt;
    &lt;/dependencies&gt;

    &lt;!-- Package as an executable jar --&gt;
    &lt;build&gt;
        &lt;plugins&gt;
            &lt;plugin&gt;
                &lt;groupId&gt;org.springframework.boot&lt;/groupId&gt;
                &lt;artifactId&gt;spring-boot-maven-plugin&lt;/artifactId&gt;
            &lt;/plugin&gt;
        &lt;/plugins&gt;
    &lt;/build&gt;
&lt;/project&gt;
</pre>
注：Spring Boot依赖的groupId是org.springframework.boot，一般Maven pom需要继承spring-boot-starter-parent，然后声明相应[Starter POMs](http://docs.spring.io/spring-boot/docs/current/reference/htmlsingle/#using-boot-starter-poms).如果不想继承spring-boot-starter-parent，可以使用import作用域。

#### 2.Gradle方式

build.gradle脚本：
<pre>
buildscript {
    repositories {
        jcenter()
        maven { url "http://repo.spring.io/snapshot" }
        maven { url "http://repo.spring.io/milestone" }
    }
    dependencies {
        classpath("org.springframework.boot:spring-boot-gradle-plugin:1.2.2.BUILD-SNAPSHOT")
    }
}

apply plugin: 'java'
apply plugin: 'spring-boot'

jar {
    baseName = 'myproject'
    version =  '0.0.1-SNAPSHOT'
}

repositories {
    jcenter()
    maven { url "http://repo.spring.io/snapshot" }
    maven { url "http://repo.spring.io/milestone" }
}

dependencies {
    compile("org.springframework.boot:spring-boot-starter-web")
    testCompile("org.springframework.boot:spring-boot-starter-test")
}
</pre>

#### 3.安装Spring Boot命令行工具

<pre>
$ gvm install springboot
$ spring --version
$ gvm ls springboot
$ . ~/.gvm/springboot/current/shell-completion/bash/spring
$ spring <HIT TAB HERE>
  grab  help  jar  run  test  version
</pre>

#### 4.Quick Start

创建app.groovy，代码如下：
<pre>
@RestController
class ThisWillActuallyRun {
    @RequestMapping("/")
    String home() {
        "Hello World!"
    }
}
</pre>
运行：
<pre>
$ spring run app.groovy
</pre>