Question

jsp怎么连接mysql数据库

Answer 1

1.首先新建一个Java web项目；
2.第二部导入mysql驱动包；
3.然后编写测试代码如下：
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<%@ page language="java" %>
<%@ page import="com.mysql.jdbc.Driver" %>
<%@ page import="java.sql.*" %>
<%
String driverName="com.mysql.jdbc.Driver";
String userName="root";
String userPasswd="root";
String dbName="goods";
String tableName="t_admin";
String url="jdbc:mysql://localhost/"+dbName+"?user="+userName+"&password="+userPasswd;
Class.forName("com.mysql.jdbc.Driver").newInstance();
Connection connection=DriverManager.getConnection(url);
Statement statement = connection.createStatement();
String sql="SELECT * FROM "+tableName;
ResultSet rs = statement.executeQuery(sql);
ResultSetMetaData rmeta = rs.getMetaData();
int numColumns=rmeta.getColumnCount();
out.print("id");
out.print("|");
out.print("num");
out.print("<br>");
while(rs.next()) {
out.print(rs.getString(1)+" ");
out.print("|");
out.print(rs.getString(2));
out.print("<br>");
}
out.print("<br>");
out.print("数据库操作成功，恭喜你");
rs.close();
statement.close();
connection.close();
%>

4.把mysql的驱动包拷贝到tomcat的lib目录一份；
5.打开浏览器，运行测试文件，数据库操作成功。

Answer 2

通过jsp链接java程序，再用java程序链接数据库