<!--mysql依賴-->
        <dependency>
            <groupId>com.mysql</groupId>
            <artifactId>mysql-connector-j</artifactId>
            <version>8.3.0</version>
        </dependency>
        <!-- druid連接池 -->
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>druid</artifactId>
            <version>1.2.23</version>
        </dependency>
        <!--spring依賴-->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-context</artifactId>
            <version>6.1.12</version>
        </dependency>
        <!--spring操作jdbc依賴-->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-jdbc</artifactId>
            <version>6.1.12</version>
        </dependency>

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
    <!-- 整合Druid數(shù)據(jù)源連接池 -->
    <bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource">
        <!-- 注入相關(guān)的連接屬性 -->
        <property name="driverClassName" value="com.mysql.cj.jdbc.Driver"/>
        <property name="url" value="jdbc:mysql://localhost:3306/demo?useSSL=false&amp;useUnicode=true&amp;characterEncoding=utf-8&amp;timeZone=Asia/Shanghai"/>
        <property name="username" value="root"/>
        <property name="password" value="1234"/>
        <!-- 連接池的屬性配置-->
        <!-- 最大連接池?cái)?shù)量-->
        <property name="maxActive" value="200"/>
        <!-- 初始化連接池的時(shí)候建立的連接個數(shù)-->
        <property name="initialSize" value="10"/>
        <!-- 連接池最小連接數(shù)-->
        <property name="minIdle" value="10"/>
        <!-- 獲取連接的最大等待時(shí)間，單位：毫秒-->
        <property name="maxWait" value="2000"/>
        <!-- 檢測連接是否有效-->
        <property name="testWhileIdle" value="true"/>
        <property name="testOnReturn" value="false"/>
        <!-- 用一條偽sql來檢查連接-->
        <property name="validationQuery" value="select 1"/>
        <!-- 是否緩存PreparedStatement，mysql中建議關(guān)閉-->
        <property name="poolPreparedStatements" value="false"/>
    </bean>
</beans>

public class Main {
    public static void main(String[] args) throws Exception {
        ApplicationContext context = new ClassPathXmlApplicationContext("applicationContext.xml");
        //從容器中獲取數(shù)據(jù)源連接池（Druid實(shí)現(xiàn)）
        DataSource dataSource = context.getBean("dataSource", DataSource.class);
        //可以強(qiáng)轉(zhuǎn)為DruidDataSource
        DruidDataSource ds = (DruidDataSource) dataSource;
        //從池中獲取連接(當(dāng)?shù)谝淮潍@取連接時(shí)才初始化)
        Connection connection = ds.getConnection();
        System.out.println("池大?。? + ds.getPoolingCount());
        connection.close();
        System.out.println("池大小：" + ds.getPoolingCount());
    }
}