How to use IDEA to create a SpringBoot project

1. Create a new Project on IDEA, select Spring Initializr,

Project SDK and select the installed JDK;

Choose Initializr Service URL select Default: https://start.spring.io )

Select the project template

Click Next

2. Configure the project

Set the project array (group), project identification (Artifact), Type select a Maven Project to indicate a maven project

Version: project version number

Name ：Project name

Description：Project description

Package：Project package name

Project configuration

Click Next Step

3. Select the project template

Let’s choose to create a Web project

Select the Spring Boot version

Select project template

4. Set project name and project path

Set project name and project path

After setting the project path and project name, click FINish to complete the project creation. You need to build the project and wait for a while to complete.

5. After the creation is completed, we delete the .mvn folder, mvnw file and mvnw.cmd file

##Delete the file

6. Let's take a look at the pom.xml file configured by maven, which contains the version library required to run the SpringBoot project

pom.xml

SpringBoot runtime The required library is:

<!-- 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></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>

7. Create a HelloService

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

8. Create the HelloService implementation class HelloServiceImpl, implement the sayHello() method, and 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!";
 }
}

9. Create HelloController, call the HelloService implementation class, and print "Hello World!" to the browser

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!";
 }
}

10. At the moment of witnessing the miracle, let's run the built project to see if it works as we expected. Enter the access address http://localhost:8080/hello

in the browser to see Hello World!

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