SpringBoot搭建微服务（一）HelloWorld！

1.建立项目，写pom.xml

使用maven构建项目后，写依赖文件pom.xml内容如下：

<?xml version="1.0" encoding="UTF-8"?><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.breeze</groupId>    <artifactId>helloworld</artifactId>    <packaging>pom</packaging>    <version>1.0-SNAPSHOT</version>    <parent>        <groupId>org.springframework.boot</groupId>        <artifactId>spring-boot-starter-parent</artifactId>        <version>1.3.5.RELEASE</version>        <relativePath/>    </parent>    <properties>        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>        <java.version>1.8</java.version>    </properties>    <dependencies>        <dependency>            <groupId>org.springframework.boot</groupId>            <artifactId>spring-boot-starter-web</artifactId>            <version>1.3.5.RELEASE</version>        </dependency>        <!--这个gson包是用于让返回数据为json格式的-->        <dependency>            <groupId>com.google.code.gson</groupId>            <artifactId>gson</artifactId>            <version>2.7</version>        </dependency>    </dependencies>    <build>        <plugins>            <plugin>                <groupId>org.springframework.boot</groupId>                <artifactId>spring-boot-maven-plugin</artifactId>                <version>1.3.2.RELEASE</version>            </plugin>        </plugins>    </build></project>

2.写main函数还有controller

项目结构如下：

Application内容如下：

package com.breeze.helloworld.server;import org.springframework.boot.SpringApplication;import org.springframework.boot.autoconfigure.SpringBootApplication;import org.springframework.context.annotation.ComponentScan;/** * Created by Breeze on 2016/12/14. */ //这个ComponentScan的作用是去扫描controller，并把各个函数的url映射起来@ComponentScan("com.breeze.helloworld")//这句是配置当前项目的@SpringBootApplicationpublic class Application {    public static void main(String[] args)    {        SpringApplication.run(Application.class,args);    }}

Controller里的内容如下：

package com.breeze.helloworld.controller;import org.springframework.stereotype.Controller;import org.springframework.web.bind.annotation.RequestMapping;import org.springframework.web.bind.annotation.ResponseBody;/** * Created by Breeze on 2016/12/14. */ //使当前的类作为Controller@Controllerpublic class HelloController {    //ResponseBody是使用刚才添加的gson依赖让这个函数返回的内容格式为json    @ResponseBody    //映射的url    @RequestMapping("/hello")    public String hello()    {        return "helloWorld";    }}

3.运行效果

是不是效果还不错，搭建起来一个简单的服务器的效率还是很高的。