com.sd.utils/Druidutils.java-连接池

package com.sd.utils;

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

import javax.sql.DataSource;

import com.alibaba.druid.pool.DruidAbstractDataSource;
import com.alibaba.druid.pool.DruidDataSource;
import com.alibaba.druid.pool.DruidDataSourceFactory;

public class Druidutils {
	
	//1加载配置文件，初始化连接池
	//静态代码块，整个程序之执行一次
	private static DruidDataSource dataSource;
	static {
		//1.1加载配置文件
		Properties properties = new Properties();
		InputStream is = Druidutils.class.getResourceAsStream("/database.properties");
		try {
			properties.load(is);
			is.close();
			//1.2初始化连接池
			dataSource = (DruidDataSource) DruidDataSourceFactory.createDataSource(properties);
		} catch(Exception e){
			e.printStackTrace();
		}
	}
	
	//2返回连接池
	public static DataSource getDataSource() {
		return dataSource;
	}
}