jsp连接mysql数据库

1.新建一个Java web项目。

2.导入mysql驱动包。（这个跟上一篇写的Java连接mysql类似）

3.编写测试代码

<%@ 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。