用 Jsp 连接 mySQL 数据库，从表里取数据，写一段代码测试一下：
程序代码1：
<!--首先导入一些必要的packages-->
<%@ page import="java.io.*"%>
<%@ page import="java.util.*"%>
<!--告诉编译器使用SQL包-->
<%@ page import="java.sql.*"%>
<!--设置中文输出-->
<%@ page contentType="text/html; charset=GB2312" %>
<html>
<head>
<title>mySQL test</title>
</head>
<body>
<%
Connection con;
Statement stmt;
ResultSet rs;
//加载驱动程序，下面的代码为加载MySQL驱动程序
Class.forName("com.mysql.jdbc.Driver");
//注册MySQL驱动程序
DriverManager.registerDriver(new com.mysql.jdbc.Driver());
//用适当的驱动程序连接到数据库
//String dbUrl = "jdbc:mysql://localhost:3306/mysql?useUnicode=true&characterEncoding=GB2312";
//String dbUser = "root"; //用户名
//String dbPwd = "abcd1001"; //密码
//建立数据库连接
//con = java.sql.DriverManager.getConnection(dbUrl, dbUser, dbPwd);
String dbUrl ="jdbc:mysql://localhost:3306/mysql?user=root&password=abcd1001&useUnicode=true&characterEncoding=gb2312";
con = DriverManager.getConnection(dbUrl);
//创建一个JDBC声明
stmt = con.createStatement();
//增加新记录
//stmt.executeUpdate("INSERT INTO books (id,name,title,price) VALUES ('999','Tom','Tomcat Bible',44.5)");
//查询记录
rs = stmt.executeQuery("select * from user");
//输出查询结果
out.println("<table border=1 width=400>");
while (rs.next())
{
String col1 = rs.getString(1);
String col2 = rs.getString(2);
String col3 = rs.getString(3);
String col4 = rs.getString(4);
//打印所显示的数据
out.println("<tr><td>"+col1+"</td><td>"+col2+"</td><td>"+col3+"</td><td>"+col4+"</td></tr>");
}
out.println("</table>");
//关闭数据库连结
