jsp链接数据库一直抛出异常？

Question

<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<%@page import="java.sql.*"%>

通过JSP读取数据库中的表

<%

try {

Class.forName("com.mysql.jdbc.Driver"); ////加载数据库驱动
String url = "jdbc:mysql://localhost:3306/csf?serverTimezone=UTC&characterEncoding=utf-8"; //指向数据库table1
String username = "root"; //数据库用户名
String password = "1234"; //数据库用户密码
Connection conn = DriverManager.getConnection(url, username, password); //连接数据库
if(conn != null){

out.print("数据库连接成功！");
out.println("
");
out.println("-------------------------------");
out.print("
");

    }
    else{  
        out.print("连接失败！");  
          }           
    }
    catch (Exception e) {        
        out.print("数据库连接异常！");  
         }  

%>

Answer 1

https://www.cnblogs.com/szhx/articles/3219366.html