Centos 7 mysql 配置JDBC驱动问题，写的jsp出现错误

<%@ page language="java" %>
<%@ page import="com.mysql.jdbc.Driver" %>
<%@ page import="java.sql.*" %>
<%
String driverName="com.mysql.jdbc.Driver";
String userName="root";
String userPasswd="119110";
String dbName="school";
String url="jdbc:mysql://localhost/"+dbName+"?user="+userName+"&password="+userPasswd;
Class.forName("com.mysql.jdbc.Driver").newInstance();
try
{
Connection connection=DriverManager.getConnection(url);
..................................

driverClass="com.mysql.jdbc.Driver";
url="jdbc:mysql://localhost:3306/xiao002";
username="root";
password="123456";
Class.forName(driverClass);
conn= DriverManager.getConnection(url,username,password);

我觉得 你差一个 3306 或许 不是吧 你看看我的这个