1、Spring boot，Mybatis 啟動報錯 Failed to auto-configure a DataSource
*************************** APPLICATION FAILED TO START *************************** Description: Failed to configure a DataSource: 'url' attribute is not specified and no embedded datasource could be configured. Reason: Failed to determine a suitable driver class Action: Consider the following: If you want an embedded database (H2, HSQL or Derby), please put it on the classpath. If you have database settings to be loaded from a particular profile you may need to activate it (no profiles are currently active).
解決方法：
注解這樣寫：@SpringBootApplication(exclude= {DataSourceAutoConfiguration.class})
2、非法反射，報錯信息
WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by org.springframework.cglib.core.ReflectUtils$1 (file:/C:/Users/%e5%85%b3%e6%96%87%e5%b3%b0/.m2/repository/org/springframework/spring-core/5.0.6.RELEASE/spring-core-5.0.6.RELEASE.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int,java.security.ProtectionDomain) WARNING: Please consider reporting this to the maintainers of org.springframework.cglib.core.ReflectUtils$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release
警告信息，暫時沒影響
3、idea運行springBoot項目報錯 Process finished with exit code 0
Deleting provided scope of spring-boot-starter-tomcat dependency helps me.
在pom.xml中添加，然后導入
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-tomcat</artifactId>
</dependency>
4、alt + enter 導入類
在使用idea開發java項目的時候，經常需要導入jdk或者是第三方類庫的類，如果是自己手工導入的話，非常麻煩，效率很低，下面來介紹下如何設置idea，就可以實現自動導入
設置自動導入的方式，來自動批量導入，打開idea的settings設置對話框
在左上角的輸入框中輸入auto import關鍵字搜索，找到Editor>General>Auto Import
勾選上add unambiguous imports on the fly選項，點擊確認，關閉對話框
在設置自動導入的窗口，還有一個Optimize imports on the fly選項，也可以勾選上，可以幫助我們自動去除不需要的導入類