本例以Windows, JDK1.8, Spring Boot (1.5.4) 为基础，演示使用Spring Boot 创建Hello World项目。

使用到的技术

  1. Spring Boot 1.5.4.RELEASE
  2. Maven 3.10
  3. Java 8
  4. IntelliJ IDEA

项目的结构图

Maven pom.xml

File : pom.xml

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<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.devnp</groupId>
  <artifactId>spring-boot-hello</artifactId>
  <version>1.0-SNAPSHOT</version>
  <packaging>jar</packaging>

  <name>spring-boot-hello</name>
  <url>http://maven.apache.org</url>

  <properties>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    <java.vserion>1.8</java.vserion>
  </properties>

  <parent>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-parent</artifactId>
    <version>1.5.4.RELEASE</version>
  </parent>

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

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

  <build>
    <plugins>
      <!-- Package as an executable jar/war -->
      <plugin>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-maven-plugin</artifactId>
      </plugin>
    </plugins>
  </build>
</project>

控制器

创建两个简单的控制器，

  1. 用来Mapping “/“ 根目录
  2. 用来Mapping “/hello”
    File : HelloController.java
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    package com.devnp.controller;

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

    import java.util.Map;

    /**
     * Created by duliu on 23/7/2017.
     */
    @Controller
    public class HelloController {

        @RequestMapping("/")
        public String index(Map<String, Object> model){
            model.put("message", "Spring Boot Hello.");
            return "index" ;
        }

        @RequestMapping("/hello")
        @ResponseBody
        public String sayHello(){
            return  "SpringBoot Say Hello." ;
        }
    }

页面模板

本例使用Thymeleaf 模板
File : index.html
[code lang=”html”]

Spring Boot Hello 
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## Spring Boot
<a href="http://projects.spring.io/spring-boot/">Spring Boot</a>, 添加 <em>@SpringBootApplication</em> 作为Spring Boot 项目的入口。
File : <em>App.java</em>

```java
package com.devnp;

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

/**
 * Hello world!
 *
 */
@SpringBootApplication
public class App 
{
    public static void main( String[] args )
    {

        SpringApplication.run(App.class, args);
    }
}

测试

运行方式：

  1. 在IDE工具中直接运行App.java
  2. 在项目的目录下 运行maven命令
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    project$ mvn sping-boot:run
  3. 使用maven编译项目，在运行jar文件
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    project$ mvn clean install
    project$ java -jar target/spring-boot-hello-1.0-SNAPSHOT.jar

访问：
默认使用的端口是：8080
URL : http://localhost:8080/

URL : http://localhost:8080/hello

代码下载

spring-boot-hello-wolrd-thymeleaf.zip