接上次JDBC 使用Derby数据库连接之后 这次尝试使用MySql 连接=-=
我们得先下载Mysql的驱动包：mysql-connector-java-5.1.41-bin.jar
下载之后 导入：
完成这个之后我们打开MySql Workbench 开启本地数据库 并创建 USERINFO 库
然后再到index.jsp中写入：
<%@ page language="java" import="java.util.*,java.sql.*" pageEncoding="ISO-8859-1"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<base href="<%=basePath%>">
<title>My JSP ‘index.jsp‘ starting page</title>
<meta http-equiv="pragma" content="no-cache">
<meta http-equiv="cache-control" content="no-cache">
<meta http-equiv="expires" content="0">
<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
<meta http-equiv="description" content="This is my page">
<!--
<link rel="stylesheet" type="text/css" href="styles.css">
-->
</head>
<body>
<%
//声明Connection对象
Connection con;
//驱动程序名
String driver = "com.mysql.jdbc.Driver";
//URL指向要访问的数据库名mydata
String url = "jdbc:mysql://localhost:3306/USERINFO";
//MySQL配置时的用户名
String user = "root";
//MySQL配置时的密码
String password = "699307";
//遍历查询结果集
Connection conn = null;
try {
//加载驱动程序
Class.forName(driver);
//1.getConnection()方法，连接MySQL数据库！！
conn = DriverManager.getConnection(url,user,password);
if(!conn.isClosed())
System.out.println("Succeeded connecting to the Database!");
//2.创建statement类对象，用来执行SQL语句！！
Statement st = conn.createStatement();
//执行sql语句
String sql = "select * from USERINFO";
//增删改查表中的内容，用executeUpdate方法
st.executeUpdate("insert into USERINFO(USERID, USERNAME) values (1, ‘NOSTRING‘)");
st.executeUpdate("insert into USERINFO(USERID, USERNAME) values (2, ‘BECHAR‘)");
st.executeUpdate("insert into USERINFO(USERID, USERNAME) values (3, ‘ALEXVIEW‘)");
//读取表的内容，用executeQuery方法
ResultSet rs = st.executeQuery("select * from USERINFO");
//循环输出内容
while(rs.next()){
int userID = rs.getInt(1);
String username = rs.getString(2);
out.println("-------------------<br>");
out.println("uerid:"+ userID +"<br>");
out.println("username:"+ username +"<br>");
out.println("-------------------<br>");
}
}catch(SQLException e){
out.print(e.getErrorCode() + "<br>");
out.print(e.getCause() + "<br>");
out.print(e.getMessage() + "<br>");
if(conn != null )
conn.close();
}
%>
</body>
</html>
写入之后日常访问：
时间： 2024-08-01 20:24:27