从零开始使用IDEA创建SpringBoot项目(图文)

<!-- SpringBoot项目的基础库文件-->
  <parent>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-parent</artifactId>
    <version>2.0.1.RELEASE</version>
    <relativePath/> <!-- lookup parent from repository -->
  </parent>

<!-- SpringBoot项目的基础库文件-->
  <dependencies>
<!-- web项目库-->
    <dependency>
      <groupId>org.springframework.boot</groupId>
      <artifactId>spring-boot-starter-web</artifactId>
    </dependency>
<!-- 测试所需库-->
    <dependency>
      <groupId>org.springframework.boot</groupId>
      <artifactId>spring-boot-starter-test</artifactId>
      <scope>test</scope>
    </dependency>
  </dependencies>

package com.example.springbootdemo.service;
import org.springframework.stereotype.Service;
@Service
public interface HelloService {
  String sayHello();
}

package com.example.springbootdemo.service.impl;
import com.example.springbootdemo.service.HelloService;
import org.springframework.stereotype.Component;

@Component
public class HelloServiceImpl implements HelloService {
 @Override
 public String sayHello() {
   return "Hello World!";
 }
}

package com.example.springbootdemo.service.impl;
import com.example.springbootdemo.service.HelloService;
import org.springframework.stereotype.Component;

@Component
public class HelloServiceImpl implements HelloService {
 @Override
 public String sayHello() {
   return "Hello World!";
 }
}