Go语言视频零基础入门到精通

huigeas

我做了一个关于文件上传的测试，用到common-io与common-upload.
工程运行后，txt文件上传成功，但是上传的txt文件的内容是空的，求助。

Servlet如下:
package com.hui.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.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;
public class UploadServlet extends HttpServlet {
public void doGet(HttpServletRequest request, HttpServletResponse response)
   throws ServletException, IOException {
              this.doGet(request, response);
}

public void doPost(HttpServletRequest request, HttpServletResponse response)
   throws ServletException, IOException {
  response.setContentType("text/HTML");
  PrintWriter out = response.getWriter();
     String task=request.getParameter("task");
     if(task.equals("upload")){
          request.getRequestDispatcher("/upload/fileupload.jsp").forward(request, response);
     }else if(task.equals("save")){
          /*  int  i=0;
            InputStream inputStream=request.getInputStream();
            while(!((i=inputStream.read())==-1)){
             System.out.print((char)i);
            }*/
      DiskFileItemFactory factory=new DiskFileItemFactory();
      ServletFileUpload upload=new ServletFileUpload(factory);
         try {
    List<FileItem>filelist=upload.parseRequest(request);
    for(FileItem item:filelist){
     if(item.isFormField()==true){
        String filedname=item.getFieldName();
        String filedvalue=item.getString("UTF-8");
           System.out.println(filedname+"======"+filedvalue);
       }else{
        String filename=item.getName();
        InputStream inputStream=request.getInputStream();
        ServletContext servletContext=this.getServletContext();
        String filepath=servletContext.getRealPath("/uploads");
        OutputStream outputStream=new FileOutputStream(filepath+"/"+filename);
        System.out.println(filepath);
        int i=0;
        byte[] b=new byte[1024];
        while((i=inputStream.read(b))!=-1){
         outputStream.write(b,0,i);
        }
         inputStream.close();
         outputStream.close();
       }
    }
   } catch (FileUploadException e) {
                e.printStackTrace();
   }
     }
  out.flush();
  out.close();
}
}