IDEA 创建Springboot 2.x.x 项目

1. 创建项目

2. 设置 url

url 修改为 start.aliyun.com/\

https://start.aliyun.com/

3. 设置 项目名 和 java 版本

java 版本选为 8

4. 勾选依赖

勾选常用依赖：
web -> spring web
nosql -> redis
sql -> spring jpa + mysql

5. 修正 mysql 依赖版本

创建项目后，下载依赖可能会报错：

Could not find artifact com.mysql:mysql-connector-j:pom:unknown in alimaven

这主要是 mysql依赖没有指定版本， 需要修改 pom.xml, 添加 mysql 版本

6. 修改文件编码

当进入项目编辑文件时，可能出现乱码现象，这时需要:

1. 修改文件编码

文件 -> 设置 -> 编辑器 -> 文件编码

2. 修改编译器编码

文件 -> 设置 -> 构建、执行、部署 -> 编译器 -> java 编译器

7. 配置setting.xml

如果不配置setting.xml 的话，下载mvn依赖会非常慢

7.1 创建setting.xml

选中项目目录，点击鼠标右键

7.2 配置阿里云国内镜像源

【设置Maven镜像库为[阿里云镜像]库和Junit镜像库】

填充以下内容：

<?xml version="1.0" encoding="UTF-8"?>
<settings xmlns="http://maven.apache.org/SETTINGS/1.0.0"
          xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
          xsi:schemaLocation="http://maven.apache.org/SETTINGS/1.0.0 http://maven.apache.org/xsd/settings-1.0.0.xsd">
<mirrors>
 
<!--    <mirror>-->
<!--      <id>mirrorId</id>-->
<!--      <mirrorOf>repositoryId</mirrorOf>-->
<!--      <name>Human Readable Name for this Mirror.</name>-->
<!--      <url>http://my.repository.com/repo/path</url>-->
<!--    </mirror>-->
 
    <mirror>
        <id>alimaven</id>
        <name>aliyun maven</name>
        <url>http://maven.aliyun.com/nexus/content/groups/public/</url>
        <mirrorOf>central</mirrorOf>
    </mirror>
 
    <mirror>
        <id>uk</id>
        <mirrorOf>central</mirrorOf>
        <name>Human Readable Name for this Mirror.</name>
        <url>http://uk.maven.org/maven2/</url>
    </mirror>
 
    <mirror>
        <id>CN</id>
        <name>OSChina Central</name>
        <url>http://maven.oschina.net/content/groups/public/</url>
        <mirrorOf>central</mirrorOf>
    </mirror>
 
    <mirror>
        <id>nexus</id>
        <name>internal nexus repository</name>
        <url>http://repo.maven.apache.org/maven2</url>
        <mirrorOf>central</mirrorOf>
    </mirror>
 
    <!-- junit镜像地址 -->
    <mirror>
        <id>junit</id>
        <name>junit Address/</name>
        <url>http://jcenter.bintray.com/</url>
        <mirrorOf>central</mirrorOf>
    </mirror>
 
<!--    <mirrors>-->
        <!-- mirror
         | Specifies a repository mirror site to use instead of a given repository. The repository that
         | this mirror serves has an ID that matches the mirrorOf element of this mirror. IDs are used
         | for inheritance and direct lookup purposes, and must be unique across the set of mirrors.
         |
        <mirror>
          <id>mirrorId</id>
          <mirrorOf>repositoryId</mirrorOf>
          <name>Human Readable Name for this Mirror.</name>
          <url>http://my.repository.com/repo/path</url>
        </mirror>
         -->
 
        <mirror>
            <!--This sends everything else to /public -->
            <id>nexus-aliyun</id>
            <mirrorOf>*</mirrorOf>
            <name>Nexus aliyun</name>
            <url>http://maven.aliyun.com/nexus/content/groups/public</url>
        </mirror>
 
        <mirror>
            <id>osc</id>
            <mirrorOf>*</mirrorOf>
            <url>http://maven.oschina.net/content/groups/public/</url>
        </mirror>
 
        <mirror>
            <id>repo2</id>
            <mirrorOf>central</mirrorOf>
            <name>Human Readable Name for this Mirror.</name>
            <url>http://repo2.maven.org/maven2/</url>
        </mirror>
 
        <mirror>
            <id>net-cn</id>
            <mirrorOf>central</mirrorOf>
            <name>Human Readable Name for this Mirror.</name>
            <url>http://maven.net.cn/content/groups/public/</url>
        </mirror>
 
        <mirror>
            <id>ui</id>
            <mirrorOf>central</mirrorOf>
            <name>Human Readable Name for this Mirror.</name>
            <url>http://uk.maven.org/maven2/</url>
        </mirror>
 
        <mirror>
            <id>ibiblio</id>
            <mirrorOf>central</mirrorOf>
            <name>Human Readable Name for this Mirror.</name>
            <url>http://mirrors.ibiblio.org/pub/mirrors/maven2/</url>
        </mirror>
 
        <mirror>
            <id>jboss-public-repository-group</id>
            <mirrorOf>central</mirrorOf>
            <name>JBoss Public Repository Group</name>
            <url>http://repository.jboss.org/nexus/content/groups/public</url>
        </mirror>
 
        <mirror>
            <id>JBossJBPM</id>
            <mirrorOf>central</mirrorOf>
            <name>JBossJBPM Repository</name>
            <url>https://repository.jboss.org/nexus/content/repositories/releases/</url>
        </mirror>
 
    </mirrors>
</settings>

7.3 重新加载依赖

8.配置自动导入依赖包

• 操作路径：

文件->设置->编辑器->常规->自动导入->勾选显示自动导入类->粘贴时自动导入
->动态添加明确的import

9. 创建配置文件

/src/main/resources/application.yaml

server:
  port: 8080
spring:
  application:
    name: test-spring
  datasource:
    driver-class-name: com.mysql.cj.jdbc.Driver
    url: jdbc:mysql://192.168.88.151:3306/test-spring?serverTimezone=UTC&useUnicode=true&characterEncoding=utf8&useSSL=false
    username: root
    password: root
  jpa:
    properties:
      hibernate:
        hbm2ddl:
          auto: update
        dialect: org.hibernate.dialect.MySQL57InnoDBDialect