(java 功能篇) Java MySQL数据库连接工具类

package com.vixuan.database; 
 
import java.io.IOException; 
import java.sql.Connection; 
import java.sql.DriverManager; 
import java.sql.ResultSet; 
import java.sql.SQLException; 
import java.sql.Statement; 
import java.util.HashMap; 
import java.util.Map; 
import java.util.Properties; 
 
 
public class MySQLUtil { 
	public Map getURL() { 
		// 读取配置文件类 
		Properties p = new Properties(); 
		try { 
			// Java反射机制--加载Oracle数据库配置文件 
			p.load(getClass().getClassLoader().getResourceAsStream( 
					"jdbc.properties")); 
		} catch (IOException e) { 
			// TODO Auto-generated catch block 
			e.printStackTrace(); 
		} 
		String url = p.getProperty("url"); 
		String username = p.getProperty("username"); 
		String pwd = p.getProperty("password"); 
		Map map = new HashMap(); 
		map.put("url", url); 
		map.put("uname", username); 
		map.put("pwd", pwd); 
		return map; 
	} 
 
	public static Connection getConn() { 
		MySQLUtil jdbc = new MySQLUtil(); 
		Map cmap = jdbc.getURL(); 
		String url = (String) cmap.get("url"); 
		String user = (String) cmap.get("uname"); 
		String password = (String) cmap.get("pwd"); 
		// Oracle 数据库连接类 
		Connection conn = null; 
		try { 
			// 加载oracle 数据库驱动 
			Class.forName("com.mysql.jdbc.Driver").newInstance(); 
			conn = DriverManager.getConnection(url, user, password); 
			System.out.println("Mysql数据库连接成功！"); 
		} catch (InstantiationException e) { 
			// TODO Auto-generated catch block 
			e.printStackTrace(); 
		} catch (IllegalAccessException e) { 
			// TODO Auto-generated catch block 
			e.printStackTrace(); 
		} catch (ClassNotFoundException e) { 
			// TODO Auto-generated catch block 
			e.printStackTrace(); 
		} catch (SQLException e) { 
			// TODO Auto-generated catch block 
			e.printStackTrace(); 
		} 
		return conn; 
 
	} 
 
	// 关闭Oracle 数据库连接方法一 
	public static void closeCSR(Connection conn, Statement st, ResultSet rs) { 
		try { 
			if (rs != null) 
				rs.close(); 
			if (st != null) 
				st.close(); 
			if (conn != null) { 
				conn.close(); 
			} 
		} catch (Exception e) { 
			// TODO: handle exception 
			e.printStackTrace(); 
		} 
 
	} 
 
	// 关闭oracle 数据库连接方法二 
	public static void closeCS(Connection conn, Statement st) { 
		try { 
			if (st != null) { 
				st.close(); 
			} 
			if (conn != null) { 
				conn.close(); 
			} 
		} catch (SQLException e) { 
			// TODO Auto-generated catch block 
			e.printStackTrace(); 
		} 
 
	} 
 
	// OracleUtil数据库工具类测试方法 
	public static void main(String[] args) { 
		MySQLUtil util = new MySQLUtil(); 
		util.getConn(); 
	} 
 
}

url=jdbc:mysql://127.0.0.1:3306/location 
username=root 
password=123456