springboot bug示例4

在引入阿里druid的时候，需要配置相关的druid属性，给它用起来
配置信息如下：
yaml配置：

server:
  port: 8088
spring:
  datasource:
    username: root
    password: 112358
    url: jdbc:mysql://127.0.0.1:3306/testjdbc?serverTimezone=GMT&useUnicode=true&characterEncoding=UTF-8&useSSL=false
    driver-class-name: com.mysql.cj.jdbc.Driver
    type: com.alibaba.druid.pool.DruidDataSource 
    #   数据源其他配置
    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
#   配置监控统计拦截的filters，去掉后监控界面sql无法统计，'wall'用于防火墙  
    filters: stat,wall,log4j
    maxPoolPreparedStatementPerConnectionSize: 20
    useGlobalDataSourceStat: true  
    connectionProperties: druid.stat.mergeSql=true;druid.stat.slowSqlMillis=500

配置组件注入springboot

@Configuration
public class DruidConfig {
    @ConfigurationProperties(prefix="spring.datasource")
    @Bean
    public DataSource druid() {
        return new DruidDataSource();
    }

}

但在运行时出现如下bug

---

APPLICATION FAILED TO START

---

Description:

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

Property: spring.datasource.filters
Value: stat,wall,log4j
Origin: class path resource [application.yml]:24:14
Reason: org.apache.log4j.Logger

Action:

Update your application's configuration

经排查发现需要导入log4j，因为yaml中配置了

image.png

在pom文件中配置

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

问题解决。

image.png