对一些文件的上传下载

				/**
				 * @(#)conn.java
				 *
				 *
				 * @author 
				 * @version 1.00 2008/10/8
				 *访问数据库的javabean
				 *
				 */
				package download;
				import java.sql.*;
				
				public class conn {
					String sDBDriver="sun.jdbc.odbc.JdbcOdbcDriver";
					String sConnStr="jdbc:odbc:driver={Microsoft Access Driver (*.mdb)};DBQ=C:/Program Files/Apache Group/Tomcat 4.1/webapps/download/download.mdb";
					Connection connect=null;
					ResultSet rs=null;
				    public conn() {
				    	try{
				    		Class.forName(sDBDriver);
				    	}
				    	catch(java.lang.ClassNotFoundException e){
				    		System.err.println(e.getMessage());
				    	}
				    }
				    
				    public ResultSet executeQuery(String sql){
				    	try{
				    		connect=DriverManager.getConnection(sConnStr);
				    		Statement stmt=connect.createStatement(ResultSet.TYPE_FORWARD_ONLY,ResultSet.CONCUR_READ_ONLY);
				    		rs=stmt.executeQuery(sql);
				    	}
				    	catch(SQLException ex){
				    		System.err.println(ex.getMessage());
				    	}
				    	return rs;
				    }
				    public int executeUpdate(String sql){
				    	int result=0;
				    	try{
				    		connect=DriverManager.getConnection(sConnStr);
				    		Statement stmt=connect.createStatement();
				    		result=stmt.executeUpdate(sql);
				    	}
				    	catch(SQLException ex){
				    		System.out.println(ex.getMessage());
				    	}
				    	return result;
				    }
				    
				}