jsp 配置MySQL服务器 以及数据的插入和读取

时间:2021-08-21 19:48:58

不多说,直接上代码。百度上面也是一大堆,大家多问百度就行。

在利用JDBC访问数据库过程中,主要涉及三种资源:对数据库的连接的连接对象Connection,SQL语句对象 Statement,访问结果集ResultSet 或 RowSet

package ShopCar;

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement; public class JDBCTest {
public static void main(String[] args) {
//驱动程序
String driver = "com.mysql.jdbc.Driver";
String url = "jdbc:mysql://127.0.0.1:3306/db";
String user = "root";
String password = "";
try {
Class.forName(driver);//加载驱动
Connection conn = DriverManager.getConnection(url,user,password);
// 连接URL为 jdbc:mysql://服务器地址/数据库名 ,后面的2个参数分别是登陆用户名和密码
System.out.println("Success connect Mysql server!");
// statement用来执行SQL语句
Statement stmt = conn.createStatement();
// 结果集
ResultSet rs = stmt.executeQuery("select * from `student`");
// student 为你表的名称
while (rs.next()) {
System.out.println(rs.getString("Sno"));
}
} catch (Exception e) {
// TODO: handle exception
System.out.print("get data error!");
e.printStackTrace();
}
}
}

如何向数据库中插入数据

import java.sql.*;

publicclass Myjproject {
publicstaticvoid main(String args[])
{
try {
Class.forName("com.mysql.jdbc.Driver"); //加载MYSQL JDBC驱动程序
//Class.forName("org.gjt.mm.mysql.Driver");
System.out.println("Success loading Mysql Driver!");
}
catch (Exception e) {
System.out.print("Error loading Mysql Driver!");
e.printStackTrace();
}
try {
Connection connect = DriverManager.getConnection( "jdbc:mysql://localhost:3306/test","root",""); int num=;
PreparedStatement Statement=connect.prepareStatement("INSERT INTO user VALUES(?,?)");
for(int i=;i<num;i++) //定义个100次的循环,往表里插入一百条信息。
{
Statement.setString(,"chongshi"+i);
Statement.setString(,"bo"+i);
Statement.executeUpdate();
} // } catch (ClassNotFoundException e) {
// TODO Auto-generated catch block
// System.out.println("An error has occurred:"+e.toString());
// e.printStackTrace();
}catch(SQLException e)
{
}
}
}