spring boot 001 —— quick start

Step 1:  Start a new Spring Boot project

1. select spring boot version: before 3.0.0 (the lateset version maybe deprecated some apis)

2. idea short cut
   - delete line --> cmd + backspace
   -

3. maven use aliyun source
   - find pom.xml in project
   - add the following code in <project></project>

    <repositories>
        <repository>
            <id>alimaven</id>
            <url>https://maven.aliyun.com/repository/public</url>
        </repository>
    </repositories>
   
    <pluginRepositories>
        <pluginRepository>
            <id>alimaven</id>
            <url>https://maven.aliyun.com/repository/public</url>
        </pluginRepository>
    </pluginRepositories>`
   

4. Error: Cannot resolve symbol 'String'
   - probably need to reinstall java sdk
   - so delete your installed sdk, and reinstall

5. idea log plugin (initial: sout --> System.out.println("");)
   - debug code always need a great log plugin - quickily and clearly - use Grep console