JSP页面代码：
<%@ page language="java" import="java.sql.*" pageEncoding="GB2312"%>
<html>
<head>
<title>MySQL</title>
</head>
<body>
连接MySQL数据库<br>
<%
String driverClass="com.mysql.jdbc.Driver";
String url="jdbc:mysql://localhost:3306/db_vote";
String username = "root";
String password = "chinaydtg0933";
Class.forName(driverClass); // 加载数据库驱动
Connection conn=DriverManager.getConnection(url, username, password); //建立连接
Statement stmt=conn.createStatement();
ResultSet rs = stmt.executeQuery("select * from tb_vote"); //执行SQL语句
while(rs.next()){
out.println("<br>用户名："+rs.getString(2)+" 密码："+rs.getString(3));
}
rs.close();
stmt.close();
conn.close();
%>
</body></html>
运行NetBean时出现的错误：
严重: StandardWrapperValve[jsp]: PWC1406: Servlet.service() for servlet jsp threw exception
运行后的页面：