package cn.itcast.web.servlet;



import java.io.File;

import java.io.FileOutputStream;

import java.io.IOException;

import java.io.InputStream;

import java.util.List;

import java.util.UUID;



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;



public class UploadServlet1 extends HttpServlet {



	public void doGet(HttpServletRequest request, HttpServletResponse response)

			throws ServletException, IOException {

		/*//request.getParameter("username");//***错误

		request.setCharacterEncoding("UTF-8");//表单为上传文件，设置request 编码无效

*/		

		//得到上传文件的保存目录

		try {

			String savePath=this.getServletContext().getRealPath("/WEB-INF/upload");

			System.out.println("文件上传的保存路径为：" + savePath);

			

			DiskFileItemFactory factory=new DiskFileItemFactory();

			factory.setRepository(new File(this.getServletContext().getRealPath("/WEB-INF/temp")));//设置临时文件路径

			

			ServletFileUpload upload=new ServletFileUpload(factory);

			

			

			upload.setHeaderEncoding("utf-8");//解决上传文件名的中文乱码问题

			if(!upload.isMultipartContent(request)){

				//按照传统方式获取数据

				return;

			}

			

			List<FileItem> list=upload.parseRequest(request);

			for(FileItem item:list){

				if(item.isFormField()){

					//fileitem中封装的是普通输入项的数据

					String name=item.getFieldName();

					System.out.println("字段名是：" + name);

					String value=item.getString("utf-8");

					System.out.println("字段值是：" + value);

				}else{

					String filename=item.getName();//不同的浏览器提交的文件是不一样的 c:\a\b\1.txt 1.txt

					System.out.println(filename);

					if(filename==null|| filename.trim().equals("")){

						continue;//进行下一次循环

					}

					filename=filename.substring(filename.lastIndexOf("\\")+1);//获取文件名称

					String saveFilename=makeFileName(filename);//设定保存的文件名称

					

					InputStream in=item.getInputStream();

					String realSavePath=makePath(saveFilename,savePath);//得到文件保存的目录

					FileOutputStream out=new FileOutputStream(realSavePath + "\\" + saveFilename);

					byte buffer[]=new byte[1024];

					int len=0;

					while((len=in.read(buffer))>0){

						out.write(buffer, 0, len);

					}

					in.close();

					out.close();

					item.delete();//删除临时文件

					

				}

			}

		} catch (FileUploadException e) {

			// TODO Auto-generated catch block

			e.printStackTrace();

		}

		

	}



	

	

	private String makePath(String saveFil