上传文件时报（文件名、目录名或卷标语法不正确）原因调查

来源：互联网发布：ssh使用的端口号编辑：程序博客网时间：2024/04/27 20:23

举例说明：

<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%><!DOCTYPEhtml PUBLIC "-//W3C//DTDHTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"><html><head><metahttp-equiv="Content-Type" content="text/html; charset=UTF-8"><title>upload file</title></head><body><form action="GetPost" method="post" enctype="multipart/form-data">    <input name="name" type="text">    <input name="sex" type="text">    <input name="file" type="file">    <input type="submit" value="提交"></form></body></html>

package com.servlet;import java.io.File;import java.io.IOException;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.FileItemFactory;import org.apache.commons.fileupload.disk.DiskFileItemFactory;import org.apache.commons.fileupload.servlet.ServletFileUpload;/** * Servlet implementation class GetPost */public class GetPost extends HttpServlet {    private static final long serialVersionUID = 1L;    protected void doGet(HttpServletRequest request,HttpServletResponse response)throws ServletException, IOException {        String name = request.getParameter("name");        String sex = request.getParameter("sex");        System.out.println("name = " + name);        System.out.println("sex = " + sex);    }    protected void doPost(HttpServletRequest request,HttpServletResponse response)throws ServletException, IOException {        boolean isMultipart = ServletFileUpload.isMultipartContent(request);        if (isMultipart) {            String dir =request.getSession().getServletContext().getRealPath("/upload");            // String dir = "C:/upload";            File dirFile = new File(dir);            if (!dirFile.exists()) {                dirFile.mkdirs();            }            try {                FileItemFactory factory = newDiskFileItemFactory();                ServletFileUpload fileUpload = newServletFileUpload(factory);                @SuppressWarnings("unchecked")                List<FileItem> items = fileUpload.parseRequest(request);                for (FileItem item : items) {                    //不是文件类型                    if (item.isFormField()) {                        String name =item.getFieldName();                        String value =item.getString();                        System.out.println(name +" = " + value);                    } else {                        //文件类型                        System.out.println(dir);                        System.out.println(item.getName());                        String longFileName = item.getName();                        char indexChar = '\\';                        String fileName = item.getName().substring(longFileName.lastIndexOf(indexChar) + 1,longFileName.length());                        System.out.println(fileName);                        //注：如果fileName带路径，则会报错（文件名、目录名或卷标语法不正确）                        //如：fileName = “C:/upload/xxx.txt”就会报错，此时可以截取fileName的最后一部分，结果就不会再报错                        File saveFile = new File(dirFile,fileName);                        item.write(saveFile);                    }                }            } catch (Exception e) {                e.printStackTrace();            }        }        doGet(request, response);    }}