新建Spring boot 啟動報錯 Failed to auto-configure a DataSource
今天學習springboot,使用idea建立專案。在選擇元件時添加了mysq 然後在第一次啟動的時候啟動報錯,錯誤資訊如下:
***************************
APPLICATION FAILED TO START
***************************
Description:
Failed to auto-configure a DataSource: 'spring.datasource.url' is not specified and no embedded datasource could be auto-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).
在多方查證後,需要在啟動類的@EnableAutoConfiguration或@SpringBootApplication中新增exclude
= {DataSourceAutoConfiguration.class},排除此類的autoconfig。啟動以後就可以正常執行。
這是因為添加了資料庫元件,所以autoconfig會去讀取資料來源配置,而我新建的專案還沒有配置資料來源,所以會導致異常出現。
解決問題方法2:不用改動新增語句,注意專案檔案結構的正確性
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