Druid（德鲁伊）数据库连接池

Druid（德鲁伊）数据库连接池

​ Druid 是阿里巴巴开源平台上的一个数据库连接池实现，它结合了C3P0、DBCP、Proxool 等DB池的优点，同时加入了日志监控，可以很好的监控DB池连接和SQL的执行情况，可以说是针对监控而生的DB连接池，可以说是目前最好的连接池之一。

1.Druid数据库连接池实现

​ src目录下创建配置文件

driverClassName=com.mysql.jdbc.Driver
url=jdbc:mysql:///test
username=root
password=root

initialSize=10
maxActive=20

​ DruidTest.java

package com.sammery.connection;

import java.io.InputStream;
import java.sql.Connection;
import java.util.Properties;

import javax.sql.DataSource;

import org.junit.Test;

import com.alibaba.druid.pool.DruidDataSourceFactory;

public class DruidTest {
	
	@Test
	public void getConnection() throws Exception{
		
		Properties pros = new Properties();
		InputStream is = ClassLoader.getSystemClassLoader().getResourceAsStream("druid.properties");
		pros.load(is);
		DataSource source = DruidDataSourceFactory.createDataSource(pros);
		
		Connection conn = source.getConnection();
		System.out.println(conn);
	}

}

2. JDBCUtils中使用Druid数据库连接技术获取连接

package com.sammery.util;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;
import java.sql.Connection;
import java.sql.SQLException;
import java.util.Properties;

import javax.sql.DataSource;

import org.apache.commons.dbcp.BasicDataSourceFactory;

import com.alibaba.druid.pool.DruidDataSourceFactory;
import com.mchange.v2.c3p0.ComboPooledDataSource;

public class JDBCUtils {
	
	/*
	 * 使用DBCP数据库连接池技术获取数据库连接*/
	private static DataSource source;
	
	static {
		try {
			Properties pros = new Properties();
			InputStream is = ClassLoader.getSystemClassLoader().getResourceAsStream("druid.properties");
			pros.load(is);
			source = DruidDataSourceFactory.createDataSource(pros);
		} catch (Exception e) {
			e.printStackTrace();
		}
	}
	
	public static Connection getConnection() throws SQLException{
		return source.getConnection(); 
	}
	
}