学步园

package com.wildcat.servlet;

import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.io.PrintWriter;
import java.util.List;

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

public class UploadServlet extends HttpServlet {

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

		DiskFileItemFactory factory=new DiskFileItemFactory();
		String path=request.getRealPath("/upload");
		factory.setRepository(new File(path));
		factory.setSizeThreshold(1024*1024);
		
		ServletFileUpload upload=new ServletFileUpload(factory);
//      这里就是中文文件名处理的代码，其实只有一行，serheaderencoding就可以了
	    upload.setHeaderEncoding("utf-8");
		try{
			List <FileItem> list=(List <FileItem>)upload.parseRequest(request);
			
			for(FileItem item:list){
				String name=item.getFieldName();//调教的文本 域名
				if (item.isFormField()){//如果上传的是文本域
					
					String value=item.getString();//提交的内容
					
					System.out.println(name+" : "+value);
					request.setAttribute(name, value);
					
				}else {//如果上传的是文件
					String value=item.getName();
					//下面是对特殊浏览器的处理
					int start=value.lastIndexOf("\\");
					String fileName=value.substring(start+1);
					request.setAttribute(name, fileName);
					//写入指定目录
					item.write(new File(path,fileName));
	/*				
					OutputStream os=new FileOutputStream(new File(path,fileName));
					InputStream in=item.getInputStream();
					byte [] buffer=new byte[400];
					long sumL=item.getSize();
					int length=0;
					double sumR = 0;
					while((length=in.read(buffer))!=-1){
						sumR+=length;
						//下面百分比可以显示进度
						System.out.println(sumR/sumL);
						os.write(buffer, 0, length);
					}
					
					in.close();
					os.close();
					
					
	*/
				}
			}
			
		}catch(Exception e){
			e.printStackTrace();
		}
		
		request.getRequestDispatcher("fileuploadResult.jsp").forward(request, response);
		
	}

}