JDBCUtils 简单的封装

public class JDBCUtils {
    /**
     * 获取数据库连接
     */
    public static Connection getConnection() throws Exception {
        //1.读取配置文件中的4个基本信息
        InputStream is = ClassLoader.getSystemClassLoader().getResourceAsStream("jdbc.properties");
        Properties pros = new Properties();
        pros.load(is);
        String user = pros.getProperty("user");
        String password = pros.getProperty("password");
        String url = pros.getProperty("url");
        String driverClass = pros.getProperty("driverClass");

        //2.加载驱动
        Class.forName(driverClass);

        //3.获取连接
        Connection conn = DriverManager.getConnection(url, user, password);
        return conn;
    }
    /**
     * 释放资源
     * @param conn
     * @param ps
     */
    public static void closeResourse(Connection conn, Statement ps){
        try {
            if (ps != null){
                ps.close();
            }
        } catch (SQLException throwables) {
            throwables.printStackTrace();
        }
        try {
            if (conn != null){
                conn.close();
            }
        } catch (SQLException throwables) {
            throwables.printStackTrace();
        }
    }
    public static void closeResourse(Connection conn, Statement ps,ResultSet rs){
        try {
            if (ps != null){
                ps.close();
            }
        } catch (SQLException throwables) {
            throwables.printStackTrace();
        }
        try {
            if (conn != null){
                conn.close();
            }
        } catch (SQLException throwables) {
            throwables.printStackTrace();
        }
        try {
            if (rs != null){
                rs.close();
            }
        } catch (SQLException throwables) {
            throwables.printStackTrace();
        }
    }
}