Form表单上传文件（type="file"）的使用

时间：2021-05-28

一，单个文件的上传

1.html/jsp页面

<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%><!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://.ser;import java.io.File;import java.io.IOException;import javax.servlet.ServletConfig;import javax.servlet.ServletException;import javax.servlet.annotation.MultipartConfig;import javax.servlet.annotation.WebServlet;import javax.servlet.http.HttpServlet;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;import javax.servlet.http.Part;/** * Servlet implementation class FileSer */@WebServlet("/FileSer")@MultipartConfig(location="e://uploadFile", fileSizeThreshold=1024*1024*1000, maxFileSize=1024*1024*1000, maxRequestSize=1024*1024*1024 )public class FileSer extends HttpServlet { private static final long serialVersionUID = 1L; private static final String location="e://uploadFile"; /** * @see HttpServlet#HttpServlet() */ public FileSer() { } @Override public void init(ServletConfig config) throws ServletException { File file =new File("e://uploadFile"); if(!file.exists()&& !file.isDirectory()) { file.mkdir(); } } /** * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response) */ protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { } /** * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response) */ protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { Part part= request.getPart("fileN"); String fileType=part.getContentType(); String fileHeader=part.getHeader("content-disposition"); //String fileName=part.getName(); long size=part.getSize(); System.out.println(part); System.out.println(fileType); System.out.println(fileHeader); //System.out.println(fileName); System.out.println(size); String filename=fileHeader.substring(fileHeader.indexOf("filename=")+10, fileHeader.lastIndexOf("\"")); part.write(filename); response.getWriter().print(filename+"上传成功"); }}

总结

以上所述是小编给大家介绍的Form表单上传域（type="file"）的使用(上传文件)，希望对大家有所帮助，如果大家有任何疑问请给我留言，小编会及时回复大家的。在此也非常感谢大家对网站的支持！

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