form.jsp
<%@ 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> </head> <body> <form action="/day22/demo1" enctype="multipart/form-data" method="post"> 用户名:<input type="text" name="username"><br> 文件:<input type="file" name="f"><br> <input type="submit"><br> </form> </body> </html>
Demo1Servlet
package com; import java.io.IOException; import java.io.InputStream; 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.FileUploadException; import org.apache.commons.fileupload.disk.DiskFileItemFactory; import org.apache.commons.fileupload.servlet.ServletFileUpload; /** *文件上传 */ public class Demo1Servlet extends HttpServlet { protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { /*String username = request.getParameter("username"); String f=request.getParameter("f"); System.out.println(username); System.out.println(f);*/ //创建磁盘文件项工厂 DiskFileItemFactory factory = new DiskFileItemFactory(); //创建核心上传对象 ServletFileUpload upload = new ServletFileUpload(factory); //解析请求 try { List<FileItem> list = upload.parseRequest(request); //遍历list for (FileItem fi : list) { //判断是普通的上传组件还是文件上传组件 if(fi.isFormField()){ //普通的上传组件 //获取name属性 String name = fi.getFieldName(); //获取值 String string = fi.getString("utf-8"); System.out.println(name+"::"+string); }else{ //文件上传组件 //获取name属性 String name = fi.getFieldName(); //获取文件的名称 String filename = fi.getName(); //获取文件内容 InputStream is = fi.getInputStream(); System.out.println("文件:"+name+"::"+filename+"::"+is); } } } catch (FileUploadException e) { e.printStackTrace(); } } protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { // TODO Auto-generated method stub doGet(request, response); } }
