databean.java

图片管理功能：图片的上载及下载

package beans;

import java.sql.*;
import java.util.Vector;


/**
 * Created by IntelliJ IDEA.
 * User: Administrator
 * Date: 2006-6-20
 * Time: 10:05:59
 * To change this template use File | Settings | File Templates.
 */
public class DataBean {
    Connection con = null;
    Statement state = null;
    ResultSet rs = null;
    String sql = null;
     public DataBean() { //构造函数
        try {
            Class.forName("com.microsoft.jdbc.sqlserver.SQLServerDriver");
            con = DriverManager
                   .getConnection(
                           "jdbc:microsoft:sqlserver://127.0.0.1:1433;databasename=Pictures",
                           "sa", "sa");
        } catch (SQLException ex) {
            System.out.println(ex.getMessage() + "路径错误");
        } catch (ClassNotFoundException ex) {
            System.out.println(ex.getMessage() + "驱动错误");
        }
    }
     public void Close() { //关闭方法
        try {
            if (rs != null) {
                rs.close();
            }
            if (state != null) {
                state.close();
            }
            if (con != null) {
                con.close();
            }
        } catch (SQLException ex) {
            ex.printStackTrace();
        }
        System.out.println("关闭成功");
    }
  public  ResultSet selectObj(String sql) throws Exception{
        ResultSet retvalSet = null;
        Statement state  = con.createStatement(ResultSet.TYPE_FORWARD_ONLY , ResultSet.CONCUR_READ_ONLY ) ;
        retvalSet = state.executeQuery(sql) ;
        return retvalSet;
    }
   public  void insertObj(String sql) throws Exception{
        Statement state  = con.createStatement(ResultSet.TYPE_FORWARD_ONLY , ResultSet.CONCUR_READ_ONLY ) ;
        state.executeUpdate(sql); 
    }
}