connectionutil.java

JavaEE订餐项目的功能：用户登录、用户注册、添加订餐信息、查询订餐、结算、权限验证

package com.amaker.util;

import java.sql.Connection;
import java.sql.DriverManager;
import java.util.Properties;

public class ConnectionUtil {
	public Connection getConnection() {
		/*String username = "root";
		String password = "1";
		String url = "jdbc:mysql://localhost:3306/struts_db";
		String driver = "com.mysql.jdbc.Driver";
*/
		
		String username =null;
		String password = null;
		String url = null;
		String driver = null;
		
		Properties prop = new Properties();
		
		try {
			prop.load(this.getClass().getClassLoader().getResourceAsStream("DBConfig.properties"));
			username = prop.getProperty("username");
			password = prop.getProperty("password");
			url = prop.getProperty("url");
			driver = prop.getProperty("driver");
			Class.forName(driver);
			return DriverManager.getConnection(url, username, password);
		} catch (Exception e) {
			e.printStackTrace();
		}
		return null;
	}
	
	public static void main(String[] args) {
		ConnectionUtil cu = new ConnectionUtil();
		Connection conn = cu.getConnection();
		System.out.println(conn);
	}
}