Crazy God said that day1: idea2019.3.2+maven set up springboot project

Why do you want to use Alibaba cloud image? If you do not configure the alicloud image, it will take a lot of time to download maven dependency from the central warehouse by default, so I choose to use the alicloud image to download dependency, and soon all the dependencies can be downloaded.

2. Use IDEA to quickly build springboot project

Reference documents: https://www.cnblogs.com/hellokuangshen/p/11255967.html

Pop up window after file - > New - > Project

1. Select project construction method: default to go to official website.

Or go to the official website https://start.spring.io The compressed package is generated and then imported into Idea.

2. Fill in project information

3. Select dependent components

4. Project name and project path

3. Running the spring boot project in IDEA

1. Project structure

2.pom.xml file

<?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 https://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <!--Part I: Inheritance spring-boot-starter-parent Dependency management, version control and packaging-->
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.2.4.RELEASE</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>

    <!--Part II: basic elements-->
    <groupId>com.example</groupId>
    <artifactId>demo0211</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>demo0211</name>
    <description>Demo project for Spring Boot</description>

    <properties>
        <java.version>1.8</java.version>
    </properties>

    <!--Part three: Project dependence-->
    <dependencies>
        <!-- web Dependency: Integration tomcat,dispatcherservlet,xml etc.-->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>

        <!--unit testing-->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
            <exclusions>
                <exclusion>
                    <groupId>org.junit.vintage</groupId>
                    <artifactId>junit-vintage-engine</artifactId>
                </exclusion>
            </exclusions>
        </dependency>
    </dependencies>

    <!--The fourth part: build configuration.
        Default use spring-boot-maven-plugin，Coordination spring-boot-starter-parent You can take it. Spring Boot Package the project into Jar To run
    -->
    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>

</project>

3. Write controller

package com.example.demo0211.controller;

import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

@RestController
public class HelloController {

    @RequestMapping("/demo1")
    public String demo1(){
        return "hello demo";
    }

}