独角兽企业重金招聘Python工程师标准>>>
引入jar包
<dependency><groupId>commons-fileupload</groupId><artifactId>commons-fileupload</artifactId><version>1.3.3</version></dependency><!-- /artifact/commons-io/commons-io --><dependency><groupId>commons-io</groupId><artifactId>commons-io</artifactId><version>2.5</version></dependency>
前端页面
<%@ page contentType="text/html; charset=UTF-8"%><html><head><meta charset="utf-8"></head><body><h2>Hello World!</h2><form action="http://localhost:8080/web_3/FileUploadHandler" enctype="multipart/form-data" method="post"><input type="file" name="file" multiple="multiple"/><label>姓名</label>:<input name="name"/><input type="submit"/></form></body></html>
java后台
package handler;import java.io.File;import java.io.IOException;import java.util.Iterator;import java.util.List;import javax.servlet.ServletContext;import javax.servlet.ServletException;import javax.servlet.annotation.WebServlet;import javax.servlet.http.HttpServlet;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;import mons.fileupload.FileItem;import mons.fileupload.FileUploadException;import mons.fileupload.disk.DiskFileItemFactory;import mons.fileupload.servlet.ServletFileUpload;/*** Servlet implementation class FileUploadHandler*/@WebServlet("/FileUploadHandler")public class FileUploadHandler extends HttpServlet {private static final long serialVersionUID = 1L;/*** @see HttpServlet#HttpServlet()*/public FileUploadHandler() {super();}/*** @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse*response)*/protected void doGet(HttpServletRequest request,HttpServletResponse response) throws ServletException, IOException {doPost(request, response);}/*** @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse*response)*/protected void doPost(HttpServletRequest request,HttpServletResponse response) throws ServletException, IOException {boolean isMultipart = ServletFileUpload.isMultipartContent(request);if (isMultipart) {// Create a factory for disk-based file itemsDiskFileItemFactory factory = new DiskFileItemFactory();// Configure a repository (to ensure a secure temp location is used)ServletContext servletContext = this.getServletConfig().getServletContext();File repository = (File) servletContext.getAttribute("javax.servlet.context.tempdir");factory.setRepository(repository);// Create a new file upload handlerServletFileUpload upload = new ServletFileUpload(factory);// Parse the requesttry {List<FileItem> items = upload.parseRequest(request);System.out.print(items.size());Iterator<FileItem> iter=items.iterator();while (iter.hasNext()) {/*type type = (type) en.nextElement();*/FileItem item=iter.next();if (item.isFormField()) {String name=item.getFieldName();String value=item.getString();}else {String fieldName = item.getFieldName();String fileName = item.getName();item.write(new File("D://"+fileName));/* System.out.println("fieldName:"+fieldName);System.out.println("fileName:"+fileName);*/}}} catch (Exception e) {e.printStackTrace();}}}}
