个登录页面，要用到数据库，代码怎么写

import java.sql.Connection

import java.sql.DriverManager

import java.sql.ResultSet

import java.sql.Statement

//这是一个查询表tbl_books中的数据的代码可以看下

public class Connec {

public static void main(String[] args) {

Connection con=null

Statement st=null

ResultSet rs=null

try {

String sql="select * from tbl_books"

Class.forName("oracle.jdbc.OracleDriver")

con=DriverManager.getConnection("jdbc:oracle:thin:@:1521:orcl", "c##jz", "m1234")

st=con.createStatement()

rs=st.executeQuery(sql)

while(rs.next()){

System.out.println(rs.getString("title"))

}

} catch (Exception e) {

e.printStackTrace()

}

}

}

using System.Data.SqlClient

string strconn="server=(local)database=xwxtuid=数据库用户名pwd=数据库密码"

sqlconnection conn=new sqlconnection(strconn)

string str="select count(*) from denglu where username='"+txtuser.Text+"' and password='"+txtpassword.Text+"'"

SqlCommand cmd=new SqlCommand(str,conn)

conn.open

int count=Convert.ToInt32(cmd.ExecuteScalar())

if(count>0)

{ Response.Redirect("index.aspx")

}

else

{

Response.Write("<script>alert('用户名或密码不正确！')</script>")

}

conn.Close()

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