前提：在SpringBoot整合JDBC的基础上完成Druid的整合

SpringBoot整合JDBC 可参考-------->  SpringBoot整合JDBC_Maiko Star的博客-CSDN博客

1.  添加Druid依赖

在pom.xml文件中添加Druid的依赖项。例如：

<dependency>
    <groupId>com.alibaba</groupId>
    <artifactId>druid-spring-boot-starter</artifactId>
    <version>1.2.6</version>
</dependency>

2.  配置Druid连接池

在application.properties或application.yml配置文件中，添加以下Druid连接池的配置：

使用application.properties：

spring.datasource.url=jdbc:mysql://localhost:3306/mydatabase
spring.datasource.username=root
spring.datasource.password=your_password
spring.datasource.driver-class-name=com.mysql.cj.jdbc.Driver

# Druid配置
spring.datasource.type=com.alibaba.druid.pool.DruidDataSource
spring.datasource.druid.initial-size=5
spring.datasource.druid.min-idle=5
spring.datasource.druid.max-active=20
spring.datasource.druid.test-on-borrow=false
spring.datasource.druid.test-while-idle=true
spring.datasource.druid.time-between-eviction-runs-millis=60000
spring.datasource.druid.min-evictable-idle-time-millis=30000
spring.datasource.druid.pool-prepared-statements=true
spring.datasource.druid.max-pool-prepared-statement-per-connection-size=20
spring.datasource.druid.filters=stat,wall,log4j
spring.datasource.druid.connectionProperties=druid.stat.mergeSql=true;druid.stat.slowSqlMillis=5000

 使用application.yml：

spring:
  datasource:
    url: jdbc:mysql://localhost:3306/mydatabase
    username: root
    password: your_password
    driver-class-name: com.mysql.cj.jdbc.Driver

  ## Druid配置
    type: com.alibaba.druid.pool.DruidDataSource
    druid:
      initial-size: 5
      min-idle: 5
      max-active: 20
      test-on-borrow: false
      test-while-idle: true
      time-between-eviction-runs-millis: 60000
      min-evictable-idle-time-millis: 30000
      pool-prepared-statements: true
      max-pool-prepared-statement-per-connection-size: 20
      filters: stat,wall,log4j
      connectionProperties: druid.stat.mergeSql=true;druid.stat.slowSqlMillis=5000

3. 创建数据源配置

创建一个Java配置类，用于配置Druid数据源，并注入到Spring Boot中。例如：

@Configuration
public class DataSourceConfig {

    @ConfigurationProperties(prefix = "spring.datasource")
    @Bean
    public DataSource dataSource() {
        return DruidDataSourceBuilder.create

4.测试

 可以通过测试类打断点的方式，debug查看配置参数是否生效