databasemanager.java

图书馆管理系统

import java.sql.*;
public class DataBaseManager
{

    Connection con;
	ResultSet rs;
	Statement stmt;
    String url="jdbc:odbc:sample";
	public DataBaseManager()
	{
        try{
	    Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
		con=DriverManager.getConnection(url);
		stmt=con.createStatement(ResultSet.TYPE_SCROLL_SENSITIVE,ResultSet.CONCUR_UPDATABLE);
	}

        catch(SQLException sqle)
	{
		System.out.println(sqle.toString());
	}
	   catch(Exception sqle1)
		{
			System.out.println(sqle1.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());
        	}
        }

}