数据库I/O连接不了

数据库I/O连接不了

给你这段代码看看 import java.sql.*;
import java.net.*;
public class sqltry { public static void main (String[] args)
{ String sDBDriver="com.microsoft.sqlserver.jdbc.SQLServerDriver"; String dbURL = "jdbc:microsoft:sqlserver://localhost:1433;DatabaseName=test;user=lysander;password=";
Connection dbconn=null; try {
Class.forName(sDBDriver); dbconn=DriverManager.getConnection(dbURL); System.out.println("Connection Successful!"); sqltry.executeUpdateStatement(dbconn); }
catch (Exception e)
{ e.printStackTrace(); } } public static void executeUpdateStatement(Connection con)

{
try

{

String SQL = "SELECT * FROM [test].[dbo].[学校代码表] ORDER BY 最低分数";

String SQL2 ="INSERT INTO [test].[dbo].[学校代码表]([学校代码],[学校名],[招生人数],[最低分数]) VALUES (001,ybo1,2000,469)";

Statement stmt = con.createStatement();

int count = stmt.executeUpdate(SQL2);

//关了Statement

stmt.close();

System.out.println("use test datebase "+"ROWS AFFECTED: " + count);

//再建一Statement,下边的ResultSet用这个得到

Statement st = con.createStatement();
ResultSet rs = st.executeQuery(SQL);
while(rs.next())
{
System.out.println(rs.getString("学校名") + ", " + rs.getString("学校代码")); }

//关闭后来建的Statement

st.close();

rs.close();

}
catch (Exception e)

{e.printStackTrace();} }

//public sqltry()

//{

//}
}

为什么呢？