newproduct.java~9~

对项目

package zhaobiao.db;

import java.util.*;
import java.sql.*;
import zhaobiao.db.*;
import zhaobiao.date.*;
/**
 * <p>Title: 招标管理信息系统</p>
 * <p>Description: 招标管理信息系统的前台设计</p>
 * <p>Copyright: Copyright (c) 2003</p>
 * <p>Company: 北京王者无敌</p>
 * @author csk
 * @version 1.0
 */

public class NewProduct {

  public NewProduct() {
  }
  public static void main(String[] args) {
    NewProduct newProduct1 = new NewProduct();
  }

  public void addProduct(Product pd)
  {
    db=DBConnectionManager.getInstance();
    con=db.getConnection("idb");
    long maxid=0;
    try {
      PreparedStatement ps1 = con.prepareStatement("select max(product_id) as id from product");
      rs =ps1.executeQuery();
      if(rs.next() ){
        maxid = rs.getLong("id")+1 ;
      }
      else
        maxid=1;
      if(ps1!=null)
        ps1.close();
    }
    catch (SQLException ex) {
      ex.printStackTrace() ;
    }
    String sql="insert into product(product_id,product_name,type_id,product_content,maker_id)values(?,?,?,?,?)";
    try {
      ps=con.prepareStatement(sql);
      ps.setLong(1,maxid);
      ps.setString(2,pd.getProduct_name()) ;
      ps.setLong(3,pd.getType_id());
      ps.setString(4,pd.getProduct_content());
      ps.setLong(5,pd.getMaker_id());
      ps.executeUpdate();
    }
    catch (SQLException ex) {
      freeCon();
      ex.printStackTrace();
    }
    freeCon();
  }

  public void delProductid(long pdid)
  {
    db=DBConnectionManager.getInstance();
    con=db.getConnection("idb");
   String sql="delete from product where product_id=?";
   try {
     ps=con.prepareStatement(sql);
     ps.setLong(1,pdid);
     ps.executeUpdate();
                                          //删除所有的ppm表中的该产品记录
     NewPPM newppm=new NewPPM();
     newppm.delPPMProductid(pdid);
     newppm.freeCon();
   }
   catch (SQLException ex) {
    freeCon();
    ex.printStackTrace();
  }

   freeCon();
 }
/**更新一个产品信息
 *
 *
 */

 public void upateProduct(Product pd)
 {
   db=DBConnectionManager.getInstance();
    con=db.getConnection("idb");
    String sql="update product set product_name=?,type_id=?,product_content=?,maker_id=? where product_id=?";
    try {
      ps=con.prepareStatement(sql);
      ps.setString(1,pd.getProduct_name());
      ps.setLong(2,pd.getType_id());
      ps.setString(3,pd.getProduct_content());
      ps.setLong(4,pd.getMaker_id());
      ps.setLong(5,pd.getProduct_id());

      ps.executeUpdate();
    }
    catch (SQLException ex) {
      freeCon();
      ex.printStackTrace();
    }
    freeCon();
 }

 /**根据typeid删除产品表中的有关产品
  *
  * @param typeid
  */
 public void delProductUpid(long typeid)
 {
   db=DBConnectionManager.getInstance();
    con=db.getConnection("idb");
    String sql="delete from product where type_id=?";
    try {
      ps=con.prepareStatement(sql);
      ps.setLong(1,typeid);
      ps.executeUpdate();
    }
    catch (SQLException ex) {
      freeCon();
      ex.printStackTrace();
    }
    freeCon();
 }

 public Vector getProductMakerid(long maker_id)
{
  Basic basic=new Basic();
  Vector list=new Vector();
  db=DBConnectionManager.getInstance();
  con=db.getConnection("idb");
  String sql="select *from product where maker_id=?";
  try {
    ps=con.prepareStatement(sql);
    ps.setLong(1,maker_id);
    rs=ps.executeQuery();
    while(rs.next())
    {
       Product pd=new Product();
      pd.setProduct_id(rs.getLong("product_id"));
      pd.setProduct_name(rs.getString("product_name"));
      pd.setType_id(rs.getLong("type_id"));
      pd.setProduct_content(rs.getString("product_content"));
      pd.setMaker_id(rs.getLong("maker_id"));
      list.add(pd);
    }
  }
  catch (SQLException ex) {
    ex.printStackTrace();
  }

  freeCon();
  return list;
}

 /**
  * 释放数据库资源<p>
  *PreparedStatement和ResultSep将关闭，Connection返回给连接池
  * @param      无
   * @repurn     无
   * @exception  SQLException
   *
   */
  public void freeCon(){
    try {
      if (rs!=null)
        rs.close() ;
      if (ps!=null)
        ps.close() ;
    }
    catch (SQLException ex) {
    }
    if (db!=null)
      db.freeConnection("idb",con) ;
  }

  private PreparedStatement ps=null;
  private DBConnectionManager db;
  private Connection con=null;
  private ResultSet rs=null;
}