Frame计算器设计

import java.sql.*;
public class connectURL {
public static void main(String[] args) {
String connectionUrl = "jdbc:sqlserver://localhost:1433;" +
"databaseName=stu_mag;user=sa;password=12";
Connection con = null;
Statement stmt = null;
ResultSet rs = null;
try {
Class.forName("com.microsoft.sqlserver.jdbc.SQLServerDriver");
con = DriverManager.getConnection(connectionUrl);
String SQL = "SELECT * FROM dbo.class";
stmt = con.createStatement();
rs = stmt.executeQuery(SQL);
while (rs.next()) {
System.out.println(rs.getString(1) + " " + rs.getString(2)+""+rs.getInt(3));
}
}
catch (Exception e) {
e.printStackTrace();
}
finally {
if (rs != null) try { rs.close(); } catch(Exception e) {}
if (stmt != null) try { stmt.close(); } catch(Exception e) {}
if (con != null) try { con.close(); } catch(Exception e) {}
}
}
}

运行效果：