springboot 取消starter的自動(dòng)注入

starer是spring boot中一個(gè)很重要的概念，starter相當(dāng)于一個(gè)模塊，它能將所需要的的依賴整合在一起并對(duì)模塊內(nèi)的bean自動(dòng)裝配到spring IOC容器，使用者只需要在maven中依賴相應(yīng)的starter包并無(wú)需做過(guò)多的依賴即可進(jìn)行開(kāi)發(fā)。

看例子

比如，我們導(dǎo)入了mybatis相關(guān)的依賴，但是我可能暫時(shí)沒(méi)用到數(shù)據(jù)庫(kù)，所以就沒(méi)有做數(shù)據(jù)庫(kù)相關(guān)的配置，這時(shí)候項(xiàng)目就會(huì)無(wú)法啟動(dòng)

2020-03-08 22:13:10.396 WARN 10692 --- [ main] ConfigServletWebServerApplicationContext : Exception encountered during context initialization - cancelling refresh attempt:

org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'dataSource' defined in class path resource

[org/springframework/boot/autoconfigure/jdbc/DataSourceConfiguration$Hikari.class]: Bean instantiation via factory method failed;

nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate
[com.zaxxer.hikari.HikariDataSource]: Factory method 'dataSource' threw exception;

nested exception is org.springframework.boot.autoconfigure.jdbc.DataSourceProperties$DataSourceBeanCreationException: Failed to determine a suitable driver class

因?yàn)閟pringboot中默認(rèn)的數(shù)據(jù)庫(kù)連接池是hikari，你沒(méi)有在application.properties里面進(jìn)行數(shù)據(jù)庫(kù)相關(guān)的配置的話，那么就會(huì)無(wú)法自動(dòng)裝載dataSource

Error creating bean with name 'dataSource' defined in class path resource [org/springframework/boot/autoconfigure/jdbc/DataSourceConfiguration$Hikari.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [com.zaxxer.hikari.HikariDataSource]

重點(diǎn)來(lái)了

如何取消相關(guān)starer的自動(dòng)注入？

我們還是以數(shù)據(jù)庫(kù)的這個(gè)為例子：

@SpringBootApplication(exclude = DataSourceAutoConfiguration.class)

那么，就需要在啟動(dòng)類加上如上配置，取消DataSourceAutoConfiguration的自動(dòng)注入

springbootApplication是一個(gè)組合注解，其實(shí)里面真正實(shí)現(xiàn)自動(dòng)注入功能的，是這個(gè)EnableAutoConfiguration注解

SpringBoot 自動(dòng)注入問(wèn)題

Description:

Field service in com.test.controller.UserController required a bean of type 'com.test.service.UserService' that could not be found.

Action:

Consider defining a bean of type 'com.test.service.UserService' in your configuration.

項(xiàng)目啟動(dòng)的時(shí)候出現(xiàn)出現(xiàn)問(wèn)題

run

controller

service

dao

配置文件如下

項(xiàng)目目錄

找了幾個(gè)類，該注解的也注解了。

以上為個(gè)人經(jīng)驗(yàn)，希望能給大家一個(gè)參考，也希望大家多多支持腳本之家。

最新評(píng)論