java使用BeanUtils封装file类型表单数据到一个对象中

package com.cc.web.servlet;

import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.apache.commons.beanutils.BeanUtils;
import org.apache.commons.fileupload.FileItem;
import org.apache.commons.fileupload.disk.DiskFileItemFactory;
import org.apache.commons.fileupload.servlet.ServletFileUpload;
import org.apache.commons.io.IOUtils;

import com.cc.domain.Category;
import com.cc.domain.Product;
import com.cc.utils.CommonsUtils;
import com.cc.web.service.AdminService;

public class AdminProductServlet extends HttpServlet {

    public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        Product product=new Product();
        //收集数据的容器
        Map<String, Object> map=new HashMap<String, Object>();
        try {
            //目的：收集表单的数据并封装成实体Product 将上传图片存到服务器磁盘上
            
            //创建磁盘文件项工厂
            DiskFileItemFactory factory=new DiskFileItemFactory();
            //创建文件上传的核心对象
            ServletFileUpload upload=new ServletFileUpload(factory);
            //解析request获得文件项对象集合
            List<FileItem> parseRequest = upload.parseRequest(request);
            for (FileItem item : parseRequest) {
                //判断是否是普通表单项
                boolean formField = item.isFormField();
                if(formField){
                    //普通表单项获得数据 封装到Product实体中
                    String fieldName = item.getFieldName();    
                    String fieldVlue=item.getString("UTF-8");
　　　　　　　　　　　　//放进map里可以自动封装数据
                    map.put(fieldName, fieldVlue);
                    
                }else{
                    //文件上传项获得文件的名称，获得文件的内容
                    String filename=item.getName();
                    String path=this.getServletContext().getRealPath("upload");
                    InputStream in=item.getInputStream();
                    OutputStream out=new FileOutputStream(path+"/"+filename);
                    IOUtils.copy(in, out);
                    in.close();
                    out.close();
                    item.delete();
                    
                    map.put("pinmage", "/"+filename);
                }
            }
            BeanUtils.populate(product, map);
            //是否product对象封装数据完全，表单不具备的需要手动封装
            //private String pid;
            product.setPid(CommonsUtils.getUUID());
            //private Date pdate
            SimpleDateFormat format=new SimpleDateFormat("yyyy-MM-dd");
            Date date=new Date();
            String format2 = format.format(date);
            Date pdate=format.parse(format2);
            
            product.setPdate(pdate);
            //private int pflag;
            product.setPflag(0);
            //private Category category;
            Category category=new Category();
            category.setCid(map.get("cid").toString());
            product.setCategory(category);
            
            //将Product传递给service层
            AdminService service =new AdminService();
            service.saveProduct(product);
        } catch (Exception e) {
            e.printStackTrace();
        }
        
    }

    public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {

        doGet(request, response);
    }

}