Spring Boot 2.+默认使用的就是连接池HikariCP
所以，只要引入相关包即可

引入

        <dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-web</artifactId></dependency><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-data-jpa</artifactId></dependency><dependency><groupId>mysql</groupId><artifactId>mysql-connector-java</artifactId><version>8.0.26</version></dependency>

application.yaml

spring:########-spring datasource-########datasource:#账号配置url: jdbc:mysql://127.0.0.1:3306/test?useUnicode=true&characterEncoding=utf8&serverTimezone=GMT%2B8username: rootpassword: root#hikari数据库连接池hikari:pool-name: Retail_HikariCPminimum-idle: 5 #最小空闲连接数量idle-timeout: 180000 #空闲连接存活最大时间，默认600000（10分钟）maximum-pool-size: 10 #连接池最大连接数，默认是10auto-commit: true  #此属性控制从池返回的连接的默认自动提交行为,默认值：truemax-lifetime: 1800000 #此属性控制池中连接的最长生命周期，值0表示无限生命周期，默认1800000即30分钟connection-timeout: 30000 #数据库连接超时时间,默认30秒，即30000connection-test-query: SELECT 1

输出

  .   ____          _            __ _ _/\\ / ___'_ __ _ _(_)_ __  __ _ \ \ \ \
( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \\\/  ___)| |_)| | | | | || (_| |  ) ) ) )'  |____| .__|_| |_|_| |_\__, | / / / /=========|_|==============|___/=/_/_/_/:: Spring Boot ::                (v2.5.2)2021-08-09 14:25:51.322  INFO 1298 --- [           main] com.example.demorsa.DemoRsaApplication   : Starting DemoRsaApplication using Java 11.0.2 on foxdeiMac with PID 1298
2021-08-09 14:25:51.324  INFO 1298 --- [           main] com.example.demorsa.DemoRsaApplication   : No active profile set, falling back to default profiles: default
2021-08-09 14:25:51.905  INFO 1298 --- [           main] .s.d.r.c.RepositoryConfigurationDelegate : Bootstrapping Spring Data JPA repositories in DEFAULT mode.
2021-08-09 14:25:51.921  INFO 1298 --- [           main] .s.d.r.c.RepositoryConfigurationDelegate : Finished Spring Data repository scanning in 8 ms. Found 0 JPA repository interfaces.
2021-08-09 14:25:52.272  INFO 1298 --- [           main] o.s.b.w.embedded.tomcat.TomcatWebServer  : Tomcat initialized with port(s): 8080 (http)
2021-08-09 14:25:52.279  INFO 1298 --- [           main] o.apache.catalina.core.StandardService   : Starting service [Tomcat]
2021-08-09 14:25:52.279  INFO 1298 --- [           main] org.apache.catalina.core.StandardEngine  : Starting Servlet engine: [Apache Tomcat/9.0.48]
2021-08-09 14:25:52.350  INFO 1298 --- [           main] o.a.c.c.C.[Tomcat].[localhost].[/]       : Initializing Spring embedded WebApplicationContext
2021-08-09 14:25:52.350  INFO 1298 --- [           main] w.s.c.ServletWebServerApplicationContext : Root WebApplicationContext: initialization completed in 954 ms
2021-08-09 14:25:52.456  INFO 1298 --- [           main] com.zaxxer.hikari.HikariDataSource       : Retail_HikariCP - Starting...
2021-08-09 14:25:52.600  INFO 1298 --- [           main] com.zaxxer.hikari.HikariDataSource       : Retail_HikariCP - Start completed.
2021-08-09 14:25:52.633  INFO 1298 --- [           main] o.hibernate.jpa.internal.util.LogHelper  : HHH000204: Processing PersistenceUnitInfo [name: default]
2021-08-09 14:25:52.661  INFO 1298 --- [           main] org.hibernate.Version                    : HHH000412: Hibernate ORM core version 5.4.32.Final
2021-08-09 14:25:52.740  INFO 1298 --- [           main] o.hibernate.annotations.common.Version   : HCANN000001: Hibernate Commons Annotations {5.1.2.Final}
2021-08-09 14:25:52.814  INFO 1298 --- [           main] org.hibernate.dialect.Dialect            : HHH000400: Using dialect: org.hibernate.dialect.MySQL55Dialect
2021-08-09 14:25:52.919  INFO 1298 --- [           main] o.h.e.t.j.p.i.JtaPlatformInitiator       : HHH000490: Using JtaPlatform implementation: [org.hibernate.engine.transaction.jta.platform.internal.NoJtaPlatform]
2021-08-09 14:25:52.927  INFO 1298 --- [           main] j.LocalContainerEntityManagerFactoryBean : Initialized JPA EntityManagerFactory for persistence unit 'default'
2021-08-09 14:25:52.958  WARN 1298 --- [           main] JpaBaseConfiguration$JpaWebConfiguration : spring.jpa.open-in-view is enabled by default. Therefore, database queries may be performed during view rendering. Explicitly configure spring.jpa.open-in-view to disable this warning
2021-08-09 14:25:53.236  INFO 1298 --- [           main] o.s.b.w.embedded.tomcat.TomcatWebServer  : Tomcat started on port(s): 8080 (http) with context path ''
2021-08-09 14:25:53.245  INFO 1298 --- [           main] com.example.demorsa.DemoRsaApplication   : Started DemoRsaApplication in 2.233 seconds (JVM running for 2.8)

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SpringBoot4.5.2 整合HikariCP 数据库连接池

引入

application.yaml

输出

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