Java中Class.forName()在代码上无法执行报错NotFound的解决过程

driverClassName=com.mysql.jdbc.Driver
url=jdbc:mysql://localhost:3306/userlogin
username=root
password=guoyuhang
initialSize=5
maxActive=10
maxWait=3000

package cn.itcast.util;
import java.io.FileReader;
import java.io.IOException;
import java.net.URL;
import java.sql.*;
import java.util.Properties;
public class JDBCUtils {
    private static String url;
    private static String password;
    private static String user;
    private static String driverClassName;
    static {
        try {
            //开始读数据
            Properties properties = new Properties();
            //获取到该类所在的目录
            ClassLoader classLoader = JDBCUtils.class.getClassLoader();
            URL resource = classLoader.getResource("druid.properties");
            String path = resource.getPath();
            properties.load(new FileReader(path));
            //获取数据，赋值
            url = properties.getProperty("url");
            user = properties.getProperty("username");
            password = properties.getProperty("password");
            driverClassName = properties.getProperty("driverClassName");
            Class.forName(driverClassName);
        } catch (IOException e) {
            e.printStackTrace();
        } catch (ClassNotFoundException e) {
            e.printStackTrace();
        }
    }
    public static Connection getConnection() throws SQLException {
        return DriverManager.getConnection(url, user, password);
    }
    /**
     * 释放资源的方法  这里实现了重载 双参数和三参数
     */
    public static void close(Statement stmt, Connection conn){
        if(stmt!=null){
            try {
                stmt.close();
            } catch (SQLException e) {
                e.printStackTrace();
            }
        }
        if(conn!=null){
            try {
                conn.close();
            } catch (SQLException e) {
                e.printStackTrace();
            }
        }
    }
    public static void close(ResultSet rs, Statement stmt, Connection conn){
        if(rs!=null){
            try {
                rs.close();
            } catch (SQLException e) {
                e.printStackTrace();
            }
        }
        if(stmt!=null){
            try {
                stmt.close();
            } catch (SQLException e) {
                e.printStackTrace();
            }
        }
        if(conn!=null){
            try {
                conn.close();
            } catch (SQLException e) {
                e.printStackTrace();
            }
        }
    }
}