databasemanager.java

学生成绩管理系统,可以修改

import java.sql.*;
public class DataBaseManager
{
	String driverName = "com.microsoft.sqlserver.jdbc.SQLServerDriver";
	String dbURL = "jdbc:sqlserver://localhost:1433; DatabaseName=XSCJGL";
	String Username = "sa";
	String Password = "123"; 
	Connection con;
	ResultSet rs;
	Statement stmt;
	public DataBaseManager()
	{
		try{
		Class.forName(driverName);
	    con=DriverManager.getConnection(dbURL, Username, Password);
		stmt=con.createStatement(ResultSet.TYPE_SCROLL_SENSITIVE,ResultSet.CONCUR_UPDATABLE);
	}
	 catch ( ClassNotFoundException cnfex ) {
         System.out.println("连接数据库失败!" );
         cnfex.printStackTrace();
         System.exit(0);  
      }
	catch(SQLException sqle)
	{
		System.out.println(sqle.toString());
	}
	}
	public ResultSet getResult(String strSQL)
	{
		try{
		rs=stmt.executeQuery(strSQL);
		return rs;
	}
	catch(SQLException sqle)
	{
		System.out.println(sqle.toString());
		return null;
	}
	
}
        public boolean updateSql(String strSQL)
        {
        	try{
        	stmt.executeUpdate(strSQL);
        	con.commit();
             return true;
        	
        }
        catch(SQLException sqle)
        {
        	System.out.println(sqle.toString());
        	return false;
        }
        
        }
        public void closeConnection()
        {
        	try
        	{
        		con.close();
        	}
        	catch(SQLException sqle)
        	{
        		System.out.println(sqle.toString());
        	}
        }
       
}