文件上传



判断是否是文件上传

public static final boolean isMultipartContent(HttpServletRequest request)
    {
        if(!"post".equals(request.getMethod().toLowerCase()))
            return false;
        String contentType = request.getContentType();
        if(contentType == null)
            return false;
        return contentType.toLowerCase().startsWith("multipart/");
    }

package cn.wuyou.controllerServlet;

import java.io.File;
import java.io.IOException;
import java.util.HashMap;
import java.util.Iterator;
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 javax.servlet.http.HttpSession;

import org.apache.commons.fileupload.FileItem;
import org.apache.commons.fileupload.FileItemFactory;
import org.apache.commons.fileupload.disk.DiskFileItemFactory;
import org.apache.commons.fileupload.servlet.ServletFileUpload;

import cn.wuyou.dobean.Shangpin;
import cn.wuyou.service.impl.ManagerService;

public class AddSPServlet extends HttpServlet {

 private Map<String,String> fields = new HashMap<String,String>();
 
 @Override
 protected void service(HttpServletRequest request, HttpServletResponse response )
   throws ServletException, IOException {
   boolean isMultipart = ServletFileUpload.isMultipartContent(request);
   if (isMultipart) {
    try {
     // Create a factory for disk-based file items
     FileItemFactory factory = new DiskFileItemFactory();

     // Create a new file upload handler
     ServletFileUpload upload = new ServletFileUpload(factory);

     // Parse the request
     List /* FileItem */items = upload.parseRequest(request);

     // Process the uploaded items
     Iterator iter = items.iterator();
     while (iter.hasNext()) {
      FileItem item = (FileItem) iter.next();

      if (item.isFormField()) {
       processFormField(item);
      } else {
       processUploadedFile(item);
      }
     }
    } catch (Exception e) {
     e.printStackTrace();
    }
   }
   HttpSession session = request.getSession();
   
   int cp_xiaoType = (Integer)session.getAttribute("xiaoTypeId");
   int cp_daType = (Integer)session.getAttribute("daTypeId");
   
   String cp_name = fields.get("hw_name");//产品名称
   String cp_price = fields.get("hw_price1");//产品 市场价格
   String cp_pp = fields.get("pinpai_id");//品牌
   String cp_kucun = fields.get("hw_kucun");//库存
   String cp_bianhao = fields.get("hw_sn");//产品编号
   String cp_localPrice = fields.get("hw_price2");// 本站价格
   String cp_px = fields.get("hw_xu");//排序号
   
   String cp_select1 = fields.get("kxaa");//可选 项 1名称
   String cp_select1_content = fields.get("kxab");//可选项1 内容
   
   String  cp_select2 = fields.get("kxba");//可选 项2名称
   String cp_select2_content = fields.get("kxbb");//可选项2 内容
   
   String cp_simple = fields.get("hw_content");//商品简介
   String cp_xiangqi = fields.get("hw_content1");//商品详情
   
   String cp_zx = fields.get("tjsort");//最新上架
   String cp_jp = fields.get("tjindex");//精品推荐
   String cp_tj = fields.get("tejia");//特价商品
   
   String cp_path = fields.get("hw_pic");//商品图片的路径
   
   //创建一个商品对象，将数据封装
   Shangpin shangpin = new Shangpin();
   
   shangpin.setSpId(Integer.parseInt(cp_bianhao));
   shangpin.setXlbId(cp_xiaoType);
      shangpin.setPpId(Integer.parseInt(cp_pp)); 
      shangpin.setDlbId(cp_daType);
   shangpin.setSpName(cp_name);
   shangpin.setSpPrice(Float.parseFloat(cp_price));
   shangpin.setSpBprice(Float.parseFloat(cp_localPrice));
   shangpin.setSpCount(Integer.parseInt(cp_kucun));
   shangpin.setSpInfo(cp_simple);
   shangpin.setSpIntrocuce(cp_xiangqi);
   shangpin.setSpUlr(cp_path);
   shangpin.setSpJp("1".equals("cp_jp"));
   shangpin.setSpTj("1".equals("cp_tj"));
   shangpin.setSpZx("1".equals("cp_zx"));
   shangpin.setSpPx(Integer.parseInt(cp_px));
   shangpin.setSpTz1Lr(cp_select1_content);
   shangpin.setSpTz1Name(cp_select1);
   shangpin.setSpTz2Lr(cp_select2_content);
   shangpin.setSpTz2Name(cp_select2);
   
   ManagerService manager = new ManagerService();
   
   int flag = manager.addShangPin(shangpin);
   if(flag==1){
    request.setAttribute("MSG", "添加成功");
   }else{
    request.setAttribute("MSG", "添加失败");
   }
   request.getRequestDispatcher("ad_addhw.jsp").forward(request, response);
  }

  
 
 private void processUploadedFile(FileItem item) throws Exception {
  // Process a file upload
  if (!item.isFormField()) {
   String fieldName = item.getFieldName();
   String fileName = item.getName();
   long sizeInBytes = item.getSize();
   // Process a file upload
   if (fileName != null && !(fileName=fileName.trim()).equals("")) {
    int index = fileName.lastIndexOf("\\");
    if (index != -1) {
     fileName = fileName.substring(index);
    }
    String pic_path = this.getServletContext().getRealPath("images");
    File uploadedFile = new File(pic_path +"\\"+ fileName);
    item.write(uploadedFile);
   }

   
  }
 }
 
 public String getFieldValue(String fieldName) {
  return (String) this.fields.get(fieldName);
 }
  
 private void processFormField(FileItem item) {
  try {
   String fieldName = item.getFieldName();
   String fileName = item.getName();
   String tValue = item.getString();
   this.fields.put(fieldName, tValue);
  } catch (Exception e) {
   e.printStackTrace();
  }
 }
 
}