productmanager.java

经典的“招标信息管理系统”JSP源代码

package zhaobiao.db;

import java.util.*;
import java.sql.*;
import zhaobiao.db.*;
import zhaobiao.data.*;

/**
 * <p>Title: 产品信息管理类</p>
 * <p>Description: 有关产品的浏览操作</p>
 * <p>Copyright: Copyright (c) 2003</p>
 * <p>Company: </p>
 * @author unascribed
 * @version 1.0
 */

public class ProductManager {

  public ProductManager() {
  }

  /**  获得所有的类别集合
   * @param 无
   * @return Vector类别集合
   */
  public Vector getTypeList()
  {
    Vector list=new Vector();
    db=DBConnectionManager.getInstance();
    con=db.getConnection("idb");
    String sql="select *from type";
    try {
      ps=con.prepareStatement(sql);
      rs=ps.executeQuery();
      while(rs.next())
      {
        Type type=new Type();
        type.setType_id(rs.getLong("type_id"));
        type.setType_name(rs.getString("type_name"));
        type.setType_content(rs.getString("type_content"));
        list.add(type);
      }
    }
    catch (SQLException ex) {
      freeCon();
      ex.printStackTrace();
    }
    freeCon();
    return list;

  }

  /**  根据类别id，获得类别下的所有产品集合
   * @param long page
   * @param long pagemax
   * @param long type_id
   * @return Vector产品集合
   */

  public  Vector getProductList(long page ,long pagemax,long type_id)
  {
    page=page-1;
    Vector list=new Vector();
    db=DBConnectionManager.getInstance();
    con=db.getConnection("idb");
    String sql="select *from product where type_id=?";
    try {
      ps=con.prepareStatement(sql);
      ps.setLong(1,type_id) ;
      rs=ps.executeQuery();
      int count=1;
      while(rs.next())
      {
        if (count>(page*pagemax)&&count<=(page*pagemax+pagemax)){
          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);
        }
        count++;
      }
    }
    catch (SQLException ex) {
      freeCon();
      ex.printStackTrace();
    }
    freeCon();
    return list;
  }

  /**  根据类别id，获得类别下的所有产品集合的数目
   * @param long type_id（类别id）
   * @return long 类别下的所有产品集合的数目
   */
  public long getProductListCount(long type_id)
  {
    long count=0;
    Vector list=new Vector();
    db=DBConnectionManager.getInstance();
    con=db.getConnection("idb");
    String sql="select *from product where type_id=?";
    try {
      ps=con.prepareStatement(sql);
      ps.setLong(1,type_id) ;
      rs=ps.executeQuery();

      while(rs.next())
      {
        count++;
      }
    }
    catch (SQLException ex) {
      freeCon();
      ex.printStackTrace();
    }

    freeCon();
    return count;
  }

  /**根据该产品id获得PPM表中的项目集合（去掉PPM表中重复的project_id
   * @param long page
   * @param long pagemax
   * @param long product_id(产品id)
   * @return Set 产品id相关的PPM表中的项目集合
   */

  public Set getProjectList(long page ,long pagemax,long product_id)
  {
    page=page-1;
    Set set1=new TreeSet();
    Set set2=new TreeSet();
    Basic basic=new Basic();
    db=DBConnectionManager.getInstance();
    con=db.getConnection("idb");
    String sql="select *from ppm where product_id=?";
    try {
      ps=con.prepareStatement(sql);
      ps.setLong(1,product_id);
      rs=ps.executeQuery();
      int count=1;
      while(rs.next())
      {
        long projectid;
        Project pj=new Project();
        projectid=rs.getLong("project_id");
        pj=basic.getProject(projectid);
        if(set1.add(pj))
        {
          if (count>(page*pagemax)&&count<=(page*pagemax+pagemax))
          {
            set2.add(pj);;
          }
          count++;          //计数器加1
        }
      }

    }
    catch (SQLException ex) {
      freeCon();
      ex.printStackTrace();
    }
    basic.freeCon();
    freeCon();
    return set2;
  }

  /**  根据该产品id获得PPM表中的项目集合数量（去掉PPM表中重复的project_id）
   * @param long product_id（产品id）
   * @return long 产品id获得PPM表中的项目集合数量
   */

  public long getProjectListCount(long product_id)
  {
    Set set1=new TreeSet();
    long count=0;
    Basic basic=new Basic();
    db=DBConnectionManager.getInstance();
    con=db.getConnection("idb");
    String sql="select *from ppm where product_id=?";
    try {
      ps=con.prepareStatement(sql);
      ps.setLong(1,product_id);
      rs=ps.executeQuery();
      while(rs.next())
      {
        long projectid;
        Project pj=new Project();
        projectid=rs.getLong("project_id");
        pj=basic.getProject(projectid);
        if(set1.add(pj))
        {
          count++;          //计数器加1
        }
      }

    }
    catch (SQLException ex) {
      freeCon();
      ex.printStackTrace();
    }
    basic.freeCon();
    freeCon();
    return count;
  }

  /** 根据厂商id获的该厂商的所有产品的集合
   *
   * @param maker_id（厂商id）
   * @return Vector该厂商的所有产品的集合
   */

  public Vector getProductMakerid(long maker_id)
  {
    Basic basic=new Basic();
    Vector list=new Vector();
    Product pd=new Product();
    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())
      {
        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) ;
  }

  public static void main(String[] args) {
    ProductManager productManager1 = new ProductManager();
  }
  private DBConnectionManager db;
  private Connection con=null;
  private ResultSet rs=null;
  private PreparedStatement ps=null;
}