tbwshc

1、把上傳的文件寫入到指定目錄的時候，出現了磁盤拒絕訪問的問題。

      解決：根據mark的回復，試了下，分析出現的原因：

                item.write(new File(path));                 //原來只寫入到目錄，沒有指定寫入的是哪個文件

                item.write(new File(path,fileName));     //修改后，指定寫入的是fileName這個文件

 

2、上傳文件出現中文亂碼的問題：

      由于jsp文件默認的編碼是UTF-8，所以上產出現中文名稱的文件時，會出現中文亂碼。

      這個問題在網上找到解決的途徑：http://m.tkk7.com/duduli/archive/2008/11/11/239845.html

    解決思路：
          ServletFileUpload upload = new ServletFileUpload(factory);

          upload.setHeaderEncoding("UTF-8");

 

3、關于“Apache FileUpload文件上傳組件API解析”可以在這里查看到：http://ajava.org/blog-273-584.html

      FileUpload 相關的 API詳解。

 

以下是今天寫的Servelt類，完成的功能：文件上傳

package com.way.fileupload.servlet;

import java.io.File;
import java.io.IOException;
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 FileUploadServelt extends HttpServlet {

        public void doGet(HttpServletRequest request, HttpServletResponse response)
                        throws ServletException, IOException {
               
                this.doPost(request, response);
        }

       
        public void doPost(HttpServletRequest request, HttpServletResponse response)
                        throws ServletException, IOException {
                       
                        DiskFileItemFactory factory = new DiskFileItemFactory();
                       
                        //String path = request.getRealPath("/UploadFiles");
                        String path = "D:" + File.separator+ "upload" + File.separator;
                       
                        factory.setSizeThreshold(1024*1024);
                       
                        ServletFileUpload upload = new ServletFileUpload(factory);
                        upload.setHeaderEncoding("UTF-8");
                        try {
                                List<FileItem> list = upload.parseRequest(request);
                               
                                for(FileItem item : list){
                                       
                                        String name = item.getFieldName();
                                       
                                        if(item.isFormField()){
                                               
                                                String value = item.getString("UTF-8");
                                               
                                                ///System.out.println("name:" + name + "  value:" + value);
                                               
                                                request.setAttribute(name, value);
                                        }else{
                                               
                                                String value = item.getName();
                                               
                                                int start = value.lastIndexOf("\\");
                                               
                                                String fileName = value.substring(start + 1);
                                                //String fileName = new String(file.getBytes("ISO-8859-1"),"UTF-8");
                                                request.setAttribute(name, fileName);
                                                //StringBuffer sb = new StringBuffer();
                                                //sb.append(path);
                                                //sb.append(fileName);
                                                item.write(new File(path,fileName));
                                        }
                                }
                        } catch (Exception e) {
                                e.printStackTrace();
                        }
                       
                        request.getRequestDispatcher("filetbUploadSuccess.jsp").forward(request, response);
        }
       
}