轉載自：https://blog.csdn.net/xingkongtianma01/article/details/81624313

網上查了下，沒有找打相關的報錯解決辦法，所以在解決問題後，整理到網上，幫助有需要的朋友。

springboot整合druid時，引入了druid的資料來源，在配置檔案application.yml中配置了相關配置

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
# 配置監控統計攔截的filters，去掉後監控介面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
也作了相關配置 DruidConfig.class
 

@Configuration
public class DruidConfig {
 
    @ConfigurationProperties(prefix = "spring.datasource")
    @Bean
    public DataSource druid() {
        return new DruidDataSource();
    }
 
    // 配置Druid的監控
    // 1、配置一個管理後臺的Servlet
    @Bean
    public ServletRegistrationBean statViewServlet() {
        ServletRegistrationBean bean 
 
= new ServletRegistrationBean(new StatViewServlet(), "/druid/*");
        Map<String, String> initParams = new HashMap<>();
 
        initParams.put("loginUsername", "admin");
        initParams.put("loginPassword", "123456");
        initParams.put("allow", "");// 預設就是允許所有訪問
        initParams.put("deny", "10.18.172.124");
 
        bean.setInitParameters(initParams);
        
 
return bean;
    }
 
    // 2、配置一個web監控的filter
    @Bean
    public FilterRegistrationBean webStatFilter() {
        FilterRegistrationBean bean = new FilterRegistrationBean();
        bean.setFilter(new WebStatFilter());
 
        Map<String, String> initParams = new HashMap<>();
        initParams.put("exclusions", "*.js,*.css,/druid/*");
 
        bean.setInitParameters(initParams);
 
        bean.setUrlPatterns(Arrays.asList("/*"));
 
        return bean;
    }
}

但是在啟動時報錯：

***************************
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

根據報錯提示在配置檔案的24行，檢視配置檔案，該行程式碼是 filters: stat,wall,log4j

看報錯原因Reason: org.apache.log4j.Logger，於是猜想少了log4j的相關依賴，在pom中引入相關依賴

<!-- https://mvnrepository.com/artifact/log4j/log4j -->
<!-- https://mvnrepository.com/artifact/log4j/log4j -->
        <dependency>
            <groupId>log4j</groupId>
            <artifactId>log4j</artifactId>
            <version>1.2.17</version>
        </dependency>

再次啟動，成功！