productmanagerservlet.java

一个基于java工厂模式的 的实现

/*
 * ProductAddServlet.java
 *
 * Created on 2007年4月30日, 上午9:58
 *
 * To change this template, choose Tools | Template Manager
 * and open the template in the editor.
 */

package com.ebuy.web.servlets;

import com.ebuy.businessfacade.ProductFacade;
import com.ebuy.entities.ProductEntity;
import java.io.File;
import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.commons.fileupload.FileItem;
import org.apache.commons.fileupload.FileUploadException;
import org.apache.commons.fileupload.disk.DiskFileItemFactory;
import org.apache.commons.fileupload.servlet.ServletFileUpload;

/**
 *
 * @author Administrator
 */
public class ProductManagerServlet extends HttpServlet
{
    private File tempDir;
    public void init()
    {
        // String path= this.getServletContext().getRealPath("temp");
        String path="c:\\temp\\";
        this.tempDir=new File(path);
        if(!this.tempDir.exists())
        {
            this.tempDir.mkdirs();
        }
    }
    public void doPost(HttpServletRequest request,HttpServletResponse response) throws IOException
    {
        //  String type=request.getParameter("exectype");
        //  if(type.equalsIgnoreCase("add"))
        {
            this.execAdd(request,response);
        }
    }
    private void execAdd(HttpServletRequest request,HttpServletResponse response) throws IOException
    {
        String productname=null;
        String strcategoryid=null;
        String strprice=null;
        String strquantity=null;
        String strdown=null;
        String script=null;
        DiskFileItemFactory factory=new DiskFileItemFactory();
        factory.setSizeThreshold(1024*4);
        factory.setRepository(this.tempDir);
        ServletFileUpload upload=new ServletFileUpload(factory);
        upload.setSizeMax(1024*1000);
        try
        {
            java.util.List list = upload.parseRequest(request);
            java.util.Iterator<FileItem> iter=list.iterator();
            FileItem item=null;
            FileItem postfile=null;
            while(iter.hasNext())
            {
                item=iter.next();
                if(item.isFormField())
                {
                    String paraname=item.getFieldName();
                    if(paraname.equalsIgnoreCase("productname"))
                    {
                        String temp=item.getString();
                        byte[] b=temp.getBytes("ISO8859_1");
                        productname=new String(b,"gb2312");                      
                    }
                    else if(paraname.equalsIgnoreCase("categoryid"))
                    {
                        strcategoryid=item.getString();
                    }
                    else if(paraname.equalsIgnoreCase("unitlprice"))
                    {
                        strprice=item.getString();
                    }
                    else if(paraname.equalsIgnoreCase("quantity"))
                    {
                        strquantity=item.getString();
                    }
                    else if(paraname.equalsIgnoreCase("downbound"))
                    {
                        strdown=item.getString();
                    }
                }
                else
                {
                    postfile=item;
                    
                }
            }
            String postfilename=postfile.getName();
            int pos=postfilename.lastIndexOf(".");
            String filetype=postfilename.substring(pos);
            String imagename=System.currentTimeMillis()+filetype;
            String imageDir=this.getServletContext().getRealPath("ProductImage");
            ProductEntity p=new ProductEntity();
            p.setCategoryid(Integer.parseInt(strcategoryid));
            p.setDownbound(Integer.parseInt(strdown));
            p.setImagename(imagename);
            p.setProductname(productname);
            p.setQuantity(Integer.parseInt(strquantity));
            p.setUnitprice(Double.parseDouble(strprice));
            //数据库操作成功以后
            boolean b= ProductFacade.addPrdouct(p);
            if(b)
            {
                File f=new File(imageDir,imagename);
                postfile.write(f);
               script="<script>window.alert('保存成功');window.location='productadd.jsp';</script>"; 
            }
            else
            {
                 script="<script>window.alert('数据库错误');window.location='productadd.jsp';</script>";
            }
                      
        }
        catch (Exception ex)
        {
            script="<script>window.alert('文件操作失败');window.location='productadd.jsp';</script>";
            ex.printStackTrace();
        }
        PrintWriter out=response.getWriter();
        out.write(script);
        out.close();
    }
}