一，單個文件的上傳
1.html/jsp頁面
<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%><!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"><html><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"><title>Insert title here</title><% String path=request.getContextPath(); request.setAttribute("path", path);%></head><body><form action="${path}/FileSer" method="post" enctype="multipart/form-data"> <table> <tr> <td>上傳文件</td> <td> <input type="file" name="fileN" /> </td> </tr> <tr> <td colspan="2"> <input type="submit" /> <input type="reset" /> </td> </tr> </table> </form></body></html>2.過濾器解決中文亂碼問題
package com.ser;import java.io.IOException;import javax.servlet.Filter;import javax.servlet.FilterChain;import javax.servlet.FilterConfig;import javax.servlet.ServletException;import javax.servlet.ServletRequest;import javax.servlet.ServletResponse;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;public class Filter01 implements Filter{ @Override public void destroy() { } @Override public void doFilter(ServletRequest arg0, ServletResponse arg1, FilterChain arg2) throws IOException, ServletException { HttpServletRequest request= (HttpServletRequest)arg0; HttpServletResponse response=(HttpServletResponse)arg1; request.setCharacterEncoding("utf-8"); response.setCharacterEncoding("utf-8"); response.setContentType("text/html charset=utf-8"); arg2.doFilter(request, response); } @Override public void init(FilterConfig arg0) throws ServletException { }}3.處理html/jsp
package com.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+"上傳成功"); }}總結
以上所述是小編給大家介紹的Form表單上傳域（type="file"）的使用(上傳文件)，希望對大家有所幫助，如果大家有任何疑問請給我留言，小編會及時回復大家的。在此也非常感謝大家對武林網網站的支持！
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