web界面直连MySql数据库

<%@ page language="java" contentType="text/html; charset=utf-8"
    pageEncoding="utf-8"%>
 <%@page import="java.sql.ResultSet"%>
<%@page import="java.sql.Statement"%>
<%@page import="java.sql.Connection"%>
<%@page import="java.sql.DriverManager"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>Insert title here</title>
</head>
<body>
<%
Connection conn=null;
String db_url="jdbc:mysql://localhost:3306/shop?serverTimezone=UTC";
try {
	Class.forName("com.mysql.cj.jdbc.Driver");
	conn = DriverManager.getConnection(db_url, "root", "123456");
	 System.out.println("Success connect MySql server!");  
} catch (Exception e) {
	e.printStackTrace();
}
try {
	Statement state = conn.createStatement();
	System.out.println("添加信息");
	String username="dada";
	String password="123";
	state.execute("insert into admin (username,password) values('" + username + "','" + password+ "')");
	state.close();
} catch (Exception e) {
	e.printStackTrace();

}
conn.close();
%>
	
</body>
</html>
　　要到了我想要的结果，连上了数据库，并且添加了数据。