Spring Boot入门例子

首先使用Maven导入必要的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 启动父依赖 -->
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>1.3.3.RELEASE</version>
</parent>

<dependencies>

<!-- Spring Boot web依赖 -->
<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>

加入一个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告诉Spring以字符串的形式渲染结果，并直接返回给调用者。

@EnableAutoConfiguration 。这个注解告诉Spring Boot根据添加的jar依赖猜测你想如何配置Spring。

一个启动类

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);
}
}

我们的main方法通过调用run，将业务委托给了Spring Boot的SpringApplication类。SpringApplication将引导我们的应用，启动Spring，相应地启动被自动配置的Tomcat web服务器。我们需要将 Example.class 作为参数传递给run方法来告诉SpringApplication谁是主要的Spring组件。为了暴露任何的命令行参数，args数组也会被传递过去。

启动后就可以进行访问了

结果如下

参考

官方的《Spring Boot Reference Guide》