连接数据库

public class Test {
 
     //常量定义（一般用全大写）
  public static final String DBDRIVER="net.sourceforge.jtds.jdbc.Driver";
  public static final String DBURL
   ="jdbc:jtds:sqlserver://127.0.0.1:1433;DatabaseName=pengmengyue";//数据库名称
//  public static final String DBDRIVER="com.microsoft.sqlserver.jdbc.SQLServerDriver";
//  public static final String DBURL="jdbc:sqlserver://127.0.0.1:1433;DatabaseName=testdb";
  public static final String USER="sa";
  public static final String PASSWORD="123";
  public static void main(String[] args) throws Exception {
   try
  {   Class.forName(DBDRIVER);//加载驱动
   Connection cn=DriverManager.getConnection(DBURL,USER,PASSWORD);
   Statement st=cn.createStatement();//执行命令
   st.executeUpdate("insert into Grade values('1011','123','98')");
   cn.close();//关闭连接
  }
  catch(Exception ex){ex.printStackTrace();}
     }
}