Failed to bind properties under 'spring.datasource' to javax.sql.DataSource

在配置SpringBoot中在application.yml文件中配置瞭如下代碼:

spring:
  datasource:
    username: root
    password: root
    url: jdbc:mysql://localhost:3306/appinfodb
    driver-class-name: com.mysql.jdbc.Driver
    type: com.alibaba.druid.pool.DruidDataSource

    initialSize: 5
    minIdle: 5
    maxActive: 20
    maxWait: 60000
    timeBetweenEvictionRunsMillis: 60000
    minEvictableIdleTimeMillis: 300000
    validationQuery: SELECT 1 FROM DUAL
    testWhileIdle: true
    testOnBorrow: false
    testOnReturn: false
    poolPreparedStatements: true
#   配置監控統計攔截的filters，去掉後監控界面sql無法統計，'wall'用於防火牆
    filters: stat,wall,log4j
    maxPoolPreparedStatementPerConnectionSize: 20
    useGlobalDataSourceStat: true
    connectionProperties: druid.stat.mergeSql=true;druid.stat.slowSqlMillis=500

在測試類Debug時,出現如下錯誤:

Error creating bean with name 'druid': Could not bind properties to 'DruidDataSource' : prefix=spring.datasource, ignoreInvalidFields=false, ignoreUnknownFields=true; nested exception is org.springframework.boot.context.properties.bind.BindException: Failed to bind properties under 'spring.datasource' to javax.sql.DataSource

最後查明原因是在application.yml文件中配置了日誌:

filters: stat,wall,log4j

而在pom,xml中並沒有引入log4j依賴包
最後在pom.xml中加入如下代碼

<dependency>
			<groupId>log4j</groupId>
			<artifactId>log4j</artifactId>
			<version>1.2.17</version>
</dependency>

最後測試成功