databasemanager.java

这是一个图书管理系统

import java.sql.*;
public class DataBaseManager
{
	Connection con;
	ResultSet rs;
	Statement stmt;
	public DataBaseManager()
	{
	
	String url=	"jdbc:microsoft:sqlserver://DELL05:1433;databaseName=library";
	String user="sa"; 
    String password="sa"; 
		try{
		Class.forName( "com.microsoft.jdbc.sqlserver.SQLServerDriver" );
	  
	    con=DriverManager.getConnection(url,user,password);
		stmt=con.createStatement(ResultSet.TYPE_SCROLL_SENSITIVE,ResultSet.CONCUR_UPDATABLE);
	}
	 catch ( ClassNotFoundException cnfex ) {
         System.err.println("Failed to load JDBC/ODBC driver." );
         cnfex.printStackTrace();
         System.exit( 1 );  // terminate program
      }
	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());
        	}
        }
       
}