MySQL连接池DataSource的使用及实践

import com.alibaba.druid.pool.DruidDataSource;

public class DruidDataSourceDemo {

    public static void main(String[] args) {
        DruidDataSource dataSource = new DruidDataSource();
        dataSource.setDriverClassName("com.mysql.cj.jdbc.Driver");
        dataSource.setUrl("jdbc:mysql://localhost:3306/test?useSSL=false&serverTimezone=UTC");
        dataSource.setUsername("root");
        dataSource.setPassword("your_password");
        
        // 设置初始连接数
        dataSource.setInitialSize(5);
        // 设置最大连接数
        dataSource.setMaxActive(20);
        // 设置最小空闲连接数
        dataSource.setMinIdle(5);
        
        // 测试连接池
        testDataSource(dataSource);
    }
    
    private static void testDataSource(DruidDataSource dataSource) {
        try {
            // 获取连接
            java.sql.Connection conn = dataSource.getConnection();
            System.out.println("Connection successful!");
            // 关闭连接
            conn.close();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}

<!-- pom.xml -->
<dependency>
    <groupId>com.alibaba</groupId>
    <artifactId>druid-spring-boot-starter</artifactId>
    <version>1.2.10</version>
</dependency>

# application.properties
spring.datasource.type=com.alibaba.druid.pool.DruidDataSource
spring.datasource.url=jdbc:mysql://localhost:3306/test?useSSL=false&serverTimezone=UTC
spring.datasource.username=root
spring.datasource.password=your_password
spring.datasource.druid.initial-size=5
spring.datasource.druid.max-active=20
spring.datasource.druid.min-idle=5

// DruidDataSource实例
DruidDataSource dataSource = new DruidDataSource();
dataSource.setDriverClassName("com.mysql.cj.jdbc.Driver");
dataSource.setUrl("jdbc:mysql://localhost:3306/test?useSSL=false&serverTimezone=UTC");
dataSource.setUsername("root");
dataSource.setPassword("your_password");

// 启用SQL监控
dataSource.setProxyFilters(new ArrayList<>(Arrays.asList(
    new FilterStatName(), new SlowerStatementLogFilter(), new WallFilter()
)));