阿里druid数据库连接及配置文件

package com.jdbc.utils;

import java.io.IOException;
import java.sql.Connection;
import java.sql.SQLException;
import java.util.Properties;

import com.alibaba.druid.pool.DruidDataSource;
import com.alibaba.druid.pool.DruidPooledConnection;

public class JDBCDruid {
	
	private static Properties properties;
	private static  JDBCDruid druid;
	private static DruidDataSource ds;
	
	
	static {
		properties=new Properties();
		try {
			properties.load(Thread.currentThread().getContextClassLoader().getResourceAsStream("druid.properties"));
		} catch (IOException e) {
			e.printStackTrace();
		}
	}
	/**
	 * 创建单列模式
	 * @return JDBCDruid实例
	 */
	public static synchronized JDBCDruid getInstance() {
		if(druid==null) {
			druid=new JDBCDruid();
			return druid;
		}
		return druid;
	}
	
	private JDBCDruid() {

		ds=new DruidDataSource();
		ds.setDriverClassName(properties.getProperty("driverClassName"));
		ds.setUrl(properties.getProperty("url"));
		ds.setUsername(properties.getProperty("username"));
		ds.setPassword(properties.getProperty("password"));
		ds.setMaxActive(Integer.parseInt(properties.getProperty("maxActive")));
		
		
	}
	
	
	  public  Connection getConnection() throws SQLException {
		  Connection connection = ds.getConnection();
		  return connection;
	  }
	 

}

　　下面是druid.properties文件的配置

driverClassName=com.mysql.jdbc.Driver
url=jdbc:mysql://127.0.0.1:3306/mybase
username=root
password=abc123
initialSize=5
maxActive=10
maxWait=3000
maxIdle=8
minIdle=3