上传文件的doPost()

//上传文件的控制层

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package com.YY.Upload.Servlet;

import java.io.File;
import java.io.IOException;
import java.util.*;
 

import javax.servlet.ServletConfig;
import javax.servlet.ServletContext;
import javax.servlet.ServletException;
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;

import com.actionsoft.Util.CreateFileUtil;
 

public class FileUploadServlet extends HttpServlet {
 
 private static final long serialVersionUID = -7744625344830285257L;
 private ServletContext sc;
 private String savePath;
 
 public void doGet(HttpServletRequest request, HttpServletResponse response)
   throws ServletException, IOException {
  doPost(request, response);
 }
 
 
 public void init(ServletConfig config) {
  // 在web.xml中设置的一个初始化参数
  savePath = config.getInitParameter("savePath");
  sc = config.getServletContext();
 }
 
 public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
  request.setCharacterEncoding("UTF-8");
  DiskFileItemFactory factory = new DiskFileItemFactory();
  ServletFileUpload upload = new ServletFileUpload(factory);
  try {
   List items = upload.parseRequest(request);
   Iterator itr = items.iterator();
   while (itr.hasNext()) {
    FileItem item = (FileItem) itr.next();
    if (item.isFormField()) {
     System.out.println("表单参数名:" + item.getFieldName() + "，表单参数值:" + item.getString("UTF-8"));
    } else {
     if (item.getName() != null && !item.getName().equals("")) {
      int kb=(int) (item.getSize()/1024);
      System.out.println("上传文件的大小:" + kb+"kb");
      System.out.println("上传文件的类型:" + item.getContentType());
      // item.getName()返回上传文件在客户端的完整路径名称
      System.out.println("上传文件的名称:" + item.getName());
 
      File tempFile = new File(item.getName());
 
      //上传文件的保存路径

     // String dirName = "E:/temp/SqlFile";
      File dir = new File(sc.getRealPath("/") + savePath);
      if(dir.exists()) {
      File file = new File(sc.getRealPath("/") + savePath, tempFile.getName());
      item.write(file);
      }else{
       CreateFileUtil.createDir(sc.getRealPath("/") + savePath);
       File file = new File(sc.getRealPath("/") + savePath, tempFile.getName());
          item.write(file); 
      }
      request.setAttribute("upload.message", tempFile.getName()+"上传成功！"+kb+"kb");
     }else{
      request.setAttribute("upload.message", "没有选择上传文件！");
     }
    }
   }
  }catch(FileUploadException e){
   e.printStackTrace();
  } catch (Exception e) {
   e.printStackTrace();
   request.setAttribute("upload.message", "上传文件失败！");
  }
  request.getRequestDispatcher("/uploadResult.jsp").forward(request, response);
 }
}